💰 Commutator Surface Chart « Electrographite Carbon Co.

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Performance of Carbon Brushes CommutatorAppearance In addition to the physical appearance of the surface of the commutator, the skin or patina is of Normal Skin or Patina Formation equal importance for the good running of the carbon brushes. Each carbon brush builds a characteristic patina which is affected by operating and ambient conditions.


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Commutator wear patterns - Drives and Automation
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This guide helps you in making the judgement about the lifespan, commutation set and running behaviour of commutator by analyzing its appearance.
Moreover, if you observe the symptoms of commutator damage, you can easily replace carbon brushes by following the steps mentioned in this guide.
Being a please click for source person, we are much familiar with the term of electrical machine i.
Adding more, is a thin layer formed as a result of the and other chemical processes on the surface of wooden articles, certain stones and metals like copper, brass, bronze and other similar metals.
Consequently, patination reduces the lifespan of a metal.
Patination is prominent in metals.
The patina layer is of different colors depending upon the level of patination and characteristic of metal.
But, blue and green are the most frequent colors of patina.
Commutator Assessment In addition to the appearance of the surface of the commutator, patina is also important in the good running of commutators.
Each commutator builds a characteristic patina layer comprised of copper oxides, graphite deposits and absorbed water.
Operating and ambient conditions affect this layer.
Commutator manufacturers and users consider the following figures as a guide to assist in judging the operation.
Commutator with Acceptable Condition It contains three subordinate types.
Commutator with satisfactory condition determines the normal operation and more useful life.
It indicates good carbon brush performance, whale slot machine commutator whale slot machine for maximum brush and commutator useful life and commutator slot bar marking acceptable condition of the commutator respectively.
At this stage, we can do troubleshooting of commutator by simply visualizing the commutator crust.
Each of the following figures comes out as a result of patination and followed by its causes.
Regardless the type of condition, you must go for the replacement of carbon brushes.
Here, we provide you easy steps for Carbon Brush Installation.
Additionally, make a thorough inspection of the brushes.
Note down the unhealthy condition of brushes like roughness, heating and burning contacts etc.
Secondly, it assists technical persons in the whale slot machine of the machine.
Remove dust, dirt, oil deposits and carbon prints etc.
On balance, look at the corrosion and burnout.
Note that recommended spring pressure is 4.
You can use dry untreated canvas with a pressure block or a rubber abrasive.
Seater stone is available as the alternative.
Moreover, vacuum blows out the dust of the machine.
But, there should be proper tightness and security of the contacts.
This procedure allows the brushes to make intimate contact in its operating position in the holder.
This procedure can reduce the high friction and brush dust developed during the initial film forming period.
Warning In some cases, time allotment, operating conditions, or performance issues may require the replacement of less than a full set of brushes without normal seating.
Then, it is especially important to adhere to step 11 with extended operation at no-load.
Shortcuts on procedures for brush installation will result in excess electrical damage to the brush face and the contact surface.
Enter your email address to subscribe to this blog and receive notifications of new posts by email.
Join 277 other subscribers Email Address Subscribe Please support this website by adding us to your whitelist in your ad blocker.
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LAP WINDING Figure from Principles of Electric Machines and Power Electronics, 2nd Edition, P.C. Sen, John Wiley and Sons, 1997. Figure represents an unrolled lap winding of a dc armature, along with the commutator segments (bars) and stationary brushes. Coils are added in series until the end of the last coil joins the beginning of the first coil.


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Tips for Getting the Most Out of Your DC Motors Through Ongoing Maintenance
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Common wear patterns on commutators Looking at the wear patterns on a commutator is a fairly simple way of analysing the motor performance.
When a motor is operating normally, the brush current will vaporise some of the copper molecules and deposit them as a copper oxide film on the commutator, this film is usually uniform tan to charcoal brown in colour.
If you see faint charcoal streaks this may also really. slot machine symbols bar can an whale slot machine of normal commutation.
If the film appears to be heavy this isn't always something to worry about, especially if it is even and no areas are eso quick slot bar addon dark or worn.
What you need to be specifically aware of are the three conditions outlined below.
Slot bar marking or burning If either the first or last conductor in the slot passes under the brush before or after entering the field of commutation you may see alternating light and dark bars on the commutator.
In certain situations this is made worse, electrical overload, an incorrect neutral setting, contamination or an improper interpole strength can be factors.
Resurfacing the commutator will be required if the trailing whale slot machine of the darker bars looks to be etched or burnt.
Streaking Most commonly found on motors using long-life brushes, a dark streak appearing along the brush path is an indication that metal is migrating from the commutator to the brush.
Things to look for are insufficient brush tension this should be checked as part of your routine maintenancetoo light a load, or whale slot machine brush grades too porous can be responsible.
Additionally streaking can also be whale slot machine by commutator slot bar marking from harsh chemicals such as chlorine, hydrochloric commutator slot bar marking or silicon vapours.
As always early intervention and correction of these factors can stop the condition progressing to the more severe Threading.
Threading The transfer of excessive quantities of metal to the brushes during commutation is referred to as threading.
Threading is present when the brush paths start to resemble the threads on a bolt.
Threading may be a result of inadequate brush spring tension or too light a load.
If ignored or undetected it is a condition that will result in rapid brush wear, if detected early enough the commutator can be machined in place to restore the finish.
Grooving Grooving is typically caused by atmospheric abrasive dusts, brush grades that are too abrasive can also result in grooving.
With grooving the grooves tend to wear smoothly across the width of the brushes, with material from the commutator being worn away rather than being transferred to the brushes.
As it progresses, the brushes are pinched by the sloped walls and tension is diverted from the brush face.
The result is increased electrical resistance, with more heat being generated at both the brushes and the commutator.
If grooving is not rectified is can lead to arcing between brush holders flashover which can seriously damage the brush holders, commutator or both.
When grooving is first detected, the first step is to check for and eradicate air born abrasive dust contamination, this may involve the use of filters or ducting to supply "clean" air.
Which ever remedy is employed is it is vital to supply an adequate airflow.
If the grooving progresses too far, you will be left with no option other than to replace the commutator and rewind the armature.
Drives and Automation are an independent drive control systems integrator with over 150 years of combined experience in the application of motors and drives in industry.
The content on our site is provided for general information only.
It is not intended to amount to advice on which you should rely.
You must obtain professional or specialist advice before taking, or refraining from, any action on the basis of the content on our site.
Although we make reasonable efforts to update the information on our site, we make no representations, warranties or guarantees, whether express or implied, that the content on our site is accurate, complete or up-to-date.

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Commutator with Acceptable Condition. It contains three subordinate types. Commutator with satisfactory condition determines the normal operation and more useful life. It indicates good carbon brush performance, ideal commutator condition for maximum brush and commutator useful life and the acceptable condition of the commutator respectively.


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Commutator wear patterns - Drives and Automation
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commutator slot bar marking

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Furthermore, sequential bar marking should not be considered as a fault unless the surface of the affected bar becomes rough. This type of marking is due to the use of a number of coils in the one slot and to the magnetic coupling between these coils during commutation. The greatest amount of


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S1-LIGHT FILM Over the entire commutator surface is one of the normal conditions often seen on a well functioning machine.
Film tone is dependent on the brush grade.
S2-PATINA DARK Good condition.
Film can be light to dark in colour but the important feature is that it is uniform and even.
Normally, a good film will have a slightly polished appearance.
S3-BLOTCHY FILM This non-uniform filming condition is quite common.
The possible causes are: whale slot machine roundness, brush contact pressure, unequal magnetic fields and chemical vapours all contribute to this type of film development.
S4-SLOT BAR FILMING Repeating light and dark filming patterns related to the number whale slot machine armature coils source slot.
This pattern is related to machine design and winding condition.
A brush grade adjustment whale slot machine help improve this condition.
S5-STREAKING of only the film is not detrimental to the commutator.
Brush and commutator life are not at risk in this condition.
This type of filming can be related to low electrical load on brush, high humidity, oil and aggressive fumes.
S6-BRIGHT SPOTS Bright spots in the film whale slot machine poor contact or overloading.
S7-BAR BURNING is the erosion of the trailing edge of the commutator bar.
Maladjusted electrical symmetry of the brush holders or a poor commutation.
If not corrected, this whale slot machine can cause severe commutator damage or a flashover.
S8-SLOT BAR BURNING results in commutator erosion of every second, third, or fourth bar depending on the winding design of the armature.
This condition severely damages the commutator and reduces brush life.
S9-PATINA STREAKED WITH COLLECTOR WEAR A streaky film with no commutator wear, tracks can vary in width and colour.
Caused by atmospheric conditions humidity, oil vapour or other gases or insufficient load.
If not corrected, it can develop into commutator damage.
miter slot bar condition is caused by an electrical disturbance such machine bar joker an unbalanced armature, failed equalizers or a poor riser connection.
S11-GROOVING Is the uniform circumferential wear of the width of the brush, which is exhibited on the commutator.
link force ventilated motors can reduce the commutator whale slot machine />S12-COPPER DRAG Occurs when high energy transfers copper in a molten state.
These particles become coated by contaminants from the surrounding environment or the brush treatment and do not oxidize properly to form the film on the comm.
These particles accumulate at the edge of the bar, eventually shorting across the insulating mica.
Or, badly undercut segment edges.

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The Commutator Slot Shaver is a simple little hand tool to lightly chamfer the edges of commutator bars after undercutting. Pull it along the copper, shaving off the burs — flip it over and do the other edge. Made of hardened high-speed steel; it can be quickly resharpened on a grinding wheel.


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Commutator wear patterns - Drives and Automation
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Commutator Assessment and Carbon Brush Installation - tossy.info
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How to Insert starter armature hairpin to commutator slot by machine WIND WTS WIND AUTOMATION

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Bar marking, where some bars are lighter or darker than others, is usually considered to be normal and related to the number of conductors per slot. However, if some bars have a burnt or grayish appearance, it may indicate an armature winding fault or a high resistance riser connection. If some bars are burnt along the trailing edge, the problem


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Commutator wear patterns - Drives and Automation
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Commutator check chart, For comparing commutator surface markings, Satisfactory commutator surfaces | GE GEH-5304A User Manual | Page 33 / 45
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Furthermore, sequential bar marking should not be considered as a fault unless the surface of the affected bar becomes rough. This type of marking is due to the use of a number of coils in the one slot and to the magnetic coupling between these coils during commutation. The greatest amount of


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Commutator Surface Chart « Electrographite Carbon Co.
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Commutator check chart, For comparing commutator surface markings, Satisfactory commutator surfaces | GE GEH-5304A User Manual | Page 33 / 45
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Common wear patterns on commutators Looking at the wear patterns on a commutator is whale slot machine fairly simple way of analysing the motor performance.
When a motor is operating normally, the brush current will commutator slot bar marking some of the copper molecules and deposit them as a copper commutator slot bar marking film on the commutator, this film is usually uniform tan to charcoal brown in colour.
If you see faint charcoal streaks this may also be an indication of normal commutation.
If the film appears to be heavy this isn't always something to worry about, especially if it is even and no areas are unusually dark or worn.
What you need to be specifically aware of are the three conditions outlined below.
Slot bar marking or burning If either the first or last conductor in the slot passes under the brush before or after entering the field of commutation you may see alternating light and dark bars on the commutator.
In certain situations this is made worse, electrical overload, an incorrect neutral setting, contamination or an improper interpole strength can be factors.
Resurfacing the commutator will be required if the trailing edges of the darker bars looks to be etched or burnt.
Streaking Most commonly found on motors using long-life brushes, a dark streak appearing along the brush path is an indication that metal is migrating from the commutator to the brush.
Things to look for are insufficient brush tension this should be checked as part of your routine maintenancetoo light a load, or incorrect brush grades too porous can be responsible.
Additionally streaking can also be caused by contamination from harsh chemicals such as chlorine, hydrochloric acid or silicon vapours.
As always early intervention and correction of these factors can stop the condition progressing to the more severe Threading.
Threading The transfer of excessive quantities of metal to the brushes during commutation is referred to as threading.
Threading is present when the brush paths start to resemble whale slot machine click on a bolt.
Threading may be a result of inadequate brush spring tension or too light a load.
If ignored or undetected it is a condition that will result in rapid brush wear, if detected early enough the commutator can be machined in place to restore the finish.
Grooving Grooving is typically whale slot machine by atmospheric abrasive dusts, brush grades that are too abrasive can also result in grooving.
With grooving the grooves tend to wear smoothly across the width of the brushes, with material from the commutator being worn away rather than being transferred to the brushes.
As it progresses, the brushes are pinched by the sloped walls and tension is diverted from the brush face.
The result is increased electrical resistance, with more heat being generated at both the brushes whale slot machine the commutator.
If grooving is not rectified is can lead to arcing between brush holders flashover which can seriously damage the brush holders, commutator or both.
When grooving is first detected, the first step is to check for and eradicate air born abrasive dust contamination, this may involve the use of filters or ducting to supply "clean" air.
Which ever remedy is employed is it is vital to supply an adequate airflow.
If the grooving progresses too far, you will be left with no option other than to replace the commutator and rewind the armature.
Drives and Automation are an independent drive control systems integrator with over 150 years of combined experience in the application of motors and drives in industry.
The content on our site is provided for general information only.
It is not intended to amount to advice on which you should rely.
You apologise, bar top slot machine dimensions all obtain professional or specialist advice before taking, or refraining from, any action on the basis of the content on our site.
Although we make reasonable efforts to update the information on our site, we make no representations, warranties or guarantees, whether express or implied, that the content on our commutator slot bar marking is accurate, complete or up-to-date.

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P26 - P28: Dark patches in the middle or on the edges Shading in the middle of the bars (P26) or at the two bar edges (P28). Most frequent cause: poor maintenance of the commutator. P22 P42 P26 P24 P44 P28 BAR MARKING DUE TO ELECTRICAL CAUSES P42: Alternate bars of light and dark The dark bars have a polished, mat or blackened appearance.


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Commutator check chart, For comparing commutator surface markings, Satisfactory commutator surfaces | GE GEH-5304A User Manual | Page 33 / 45
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Commutator Assessment and Carbon Brush Installation - tossy.info
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June 12, 2019 commutator slot bar marking pm Published by As you may be aware, DC electric motors in Lubbock, TX require a bit more attention and ongoing care than AC whale slot machine and machines.
Through strong preventative maintenance practices, you can minimize downtime and keep your costs of operation under control.
Some of the best steps you can take to accomplish this include changing https://tossy.info/bar/free-bar-x-5-slots.html, checking the winding insulation and machining commutators in place.
Part of this means being able to analyze the wear and tear your commutators are experiencing, and whether or not it aligns with some of the most common wear patterns that indicate you need to perform some maintenance.
Some of the factors that can cause this issue include an incorrect neutral setting, electrical overloads, contamination in the system or improper interpole strength.
It may result in your needing to resurface the commutator to eradicate the problem.
An improper brush spring tension, a load that is too light or too porous of a grade of brush could be the problem causing this issue.
The grooves smoothly wear to the width of the brushes in the system, and the commutator material gets worn whale slot machine, rather than transferred to brushes, as happens in threading.
The problem generally happens as a result of exposure to abrasive dust in the environment, or a brush grade itself that is too abrasive.
just click for source sloped walls pinch up against the brushes, diverting the tension in the springs from the brush face and increasing electrical resistance in the process.
The greater heat generated at the brushes and commutator could cause some serious damage to brush holders or the commutator.
Therefore, be sure to check for abrasive dust if you see signs of grooving and take whatever steps needed to clear the environment.
For more information about how you can get the most out of your DC electric motors in Lubbock, TX, contact M.
Categorised in: This post was written by Writer Leave a Reply Your email address will not be published.

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including turning the commutator and/or undercutting the slots and chamfering the commutator bars. Inspections. Call your Helwig representative to inspect your motor and recommend. the appropriate carbon brush grade to ensure optimum performance. www.helwigcarbon.com. 800.962.4851. Slot Bar Marking. Bar Edge Burning Copper Drag. Causes •


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Commutator Surface Chart « Electrographite Carbon Co.
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Commutator Surface Chart « Electrographite Carbon Co.
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P26 - P28: Dark patches in the middle or on the edges Shading in the middle of the bars (P26) or at the two bar edges (P28). Most frequent cause: poor maintenance of the commutator. P22 P42 P26 P24 P44 P28 BAR MARKING DUE TO ELECTRICAL CAUSES P42: Alternate bars of light and dark The dark bars have a polished, mat or blackened appearance.


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Commutator wear patterns - Drives and Automation
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SLOT BAR-MARKING, a slightly dark- er commutator slot bar marking appears on bars in a definite pattern related to number of conductors per slot.
HEAVY FILM can appear over entire area of whale slot machine and normal commu- tator and, if uniform, is quite accept- able.
STREAKING on the commutator surface signals the beginning commutator slot bar marking serious metal transfer commutator slot bar marking the carbon brush.
Check https://tossy.info/bar/triple-gold-bars-slots.html chart below for possible causes.
THREADING of commutator with fine lines results when excessive metal transfer occurs.
It usually leads to resurfacing of commutator and rapid brush wear.
GROOVING is a mechanical condition caused by abrasive material in the brush or atmosphere.
If grooves form, start corrective action.
COPPER DRAG, an abnormal build-up of commutator material, forms most often at trailing edge of bar.
Con-dition is rare, but can cause flashover if not whale slot machine />PITCH BAR-MARKING produces low or burned spots on the commutator surface.
The number of these markings equals half or all the number of poles on the motor.
HEAVY SLOT BAR-MARKING can involve etching of trailing edge of commutator bar.
Pattern is re- lated to number of conductors per slot.
CAUSES OF POOR COMMUTATOR CONDITION Frequent visual commutator slot bar marking of commutator surfaces can warn you when any of the above conditions are developing so that you can take early corrective action.
The chart below may indi- cate some possible causes of these conditions, suggesting the proper productive maintenance.
Type of Brush Light Unbalanced Brush In Use Contamination Electrical Electrical Electrical Armature Shunt Pressure Abrasive Porous Abrasive Adjustment Overload Load Connection Field Light Vibration Brush Brush Gas Dust Streaking X X X X X X Threading X X X X Grooving X X Copper Drag X X X X Pitch Bar-Marking X X X X X Slot Bar-Making X X X HOW TO GET THE MOST VALUE FROM THIS CHART The purpose of the Commutator Check Chart is to help you spot undesirable commutator conditions as they develop so you can take corrective action before the condition becomes serious.
This chart will also serve as an aid in recognizing satisfactory surfaces.
The box chart above indicates the importance of selecting the correct brush and having the right operating conditions for optimum brush life and commutator wear.
For additional information or help with carbon brush application or commutation problems.
Contact your nearest GE Sales Office or Distributor.
WATCH FOR THESE DANGER.

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Patination limits commutator life! This guide helps you in making the judgement about the lifespan, commutation set and running behaviour of commutator by analyzing its appearance. Moreover, if you observe the symptoms of commutator damage, you can easily replace carbon brushes by following the steps mentioned in this guide. …


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Commutator Assessment and Carbon Brush Installation - tossy.info
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Commutator check chart, For comparing commutator surface markings, Satisfactory commutator surfaces | GE GEH-5304A User Manual | Page 33 / 45
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Comments
This guide helps you in making the judgement about the lifespan, commutation set and running behaviour of commutator by analyzing its appearance.
Moreover, if you observe the symptoms of commutator damage, you can easily replace carbon brushes by following the steps mentioned in this guide.
Being click the following article technical person, we are much familiar with the term of electrical machine i.
Adding more, is a thin layer formed as a result of the and other chemical processes on the surface of wooden articles, certain stones and metals like copper, whale slot machine, bronze and other similar metals.
Consequently, patination reduces the lifespan of a metal.
Patination is prominent in metals.
The patina layer is of different colors depending upon the level of patination and characteristic of metal.
But, blue and green are the most frequent colors of patina.
Commutator Assessment In addition to the appearance of the surface of the commutator, patina is also important in the good running of commutators.
Each commutator builds a characteristic patina layer comprised of copper oxides, graphite deposits and absorbed water.
Operating and ambient conditions affect this layer.
Commutator manufacturers and users consider the following figures as a guide to assist in judging the operation.
Commutator with Acceptable Condition It contains three subordinate types.
Commutator read more satisfactory condition determines the normal operation and more useful life.
It indicates good carbon brush performance, ideal commutator condition for maximum brush and commutator useful life and the acceptable condition of the commutator respectively.
At this stage, we can do troubleshooting of commutator by click visualizing the commutator crust.
Each of the following figures comes out as a result of patination and followed by its causes.
Regardless the type of condition, you must go for the replacement of carbon brushes.
Here, we provide you easy steps for Carbon Brush Installation.
Additionally, make a thorough inspection of the brushes.
Note down the unhealthy condition of brushes like roughness, heating and burning contacts etc.
Secondly, it assists technical persons in the maintenance of the commutator slot bar marking />Remove dust, dirt, oil deposits and carbon prints etc.
On balance, look at the corrosion and burnout.
Note that recommended spring pressure is 4.
You can use dry untreated canvas with a pressure block or a rubber abrasive.
Seater stone is available click the alternative.
Moreover, whale slot machine blows out the dust of the machine.
But, there should be commutator slot bar marking tightness and security of the contacts.
This procedure allows the brushes to make intimate contact in its operating position commutator slot bar marking the holder.
This procedure can reduce the high friction and brush dust developed during the initial film forming period.
Warning In some cases, time allotment, operating conditions, or performance issues may require the replacement of whale slot machine than a full set of brushes without normal seating.
Then, it is especially important to adhere to step 11 with extended operation at no-load.
Shortcuts on procedures for brush installation will result in excess electrical damage to the brush face and the contact surface.
Enter your email address to subscribe to this blog and receive notifications of new posts by email.
Join 277 other subscribers Email Address Subscribe Please support this website by adding us to your whitelist in your ad blocker.
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Commutator Assessment and Carbon Brush Installation - tossy.info
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Tips for Getting the Most Out of Your DC Motors Through Ongoing Maintenance
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SLOT BAR-MARKING, a slightly dark- er film appears on bars in a commutator slot bar marking pattern related to number of conductors per slot.
HEAVY FILM can appear over entire area of efficient and normal commu- tator and, if uniform, is quite accept- able.
STREAKING on the commutator surface signals the beginning of serious metal transfer to the carbon brush.
Check the chart below for possible causes.
THREADING of commutator with fine lines results when excessive metal transfer occurs.
It usually leads to resurfacing of commutator and rapid brush wear.
GROOVING is a mechanical condition caused by abrasive material in the brush or atmosphere.
If grooves form, start corrective action.
COPPER DRAG, an abnormal build-up of commutator material, forms most often at trailing edge of bar.
Con-dition is rare, but can cause flashover if not checked.
PITCH BAR-MARKING produces low or burned spots whale slot machine the commutator surface.
The number of these markings equals half or all the number of poles on the motor.
HEAVY SLOT BAR-MARKING can involve etching of trailing edge of commutator bar.
Pattern is re- lated to number of conductors per slot.
CAUSES OF POOR COMMUTATOR CONDITION Frequent visual inspection of commutator surfaces can warn you when any of the above conditions are developing so that you can take early corrective action.
The chart below may indi- cate some possible causes of these conditions, suggesting the proper productive maintenance.
Type of Brush Light Unbalanced Brush In Use Contamination Electrical Electrical Electrical Armature Shunt Pressure Abrasive Porous Abrasive Adjustment Overload Load Connection Field Light Vibration Brush Brush Gas Dust Streaking X X X X Commutator slot bar marking X Threading X Commutator slot bar marking X X Grooving X X Copper Drag X X X X Pitch Bar-Marking X X X Quite video vincite slot machine bar not X Slot Bar-Making X X Whale slot machine HOW TO GET THE MOST VALUE FROM THIS CHART The purpose of the Commutator Check Chart is to help you spot commutator slot bar marking commutator conditions as they develop so you can take corrective action before the condition becomes serious.
This chart will also serve as an aid in recognizing satisfactory surfaces.
The box chart above indicates the importance of selecting the correct brush and having the right operating conditions for optimum brush life and commutator wear.
For additional information or help with carbon brush application or commutation problems.
Contact your nearest GE Sales Office or Distributor.
WATCH FOR THESE DANGER.

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including turning the commutator and/or undercutting the slots and chamfering the commutator bars. Inspections. Call your Helwig representative to inspect your motor and recommend. the appropriate carbon brush grade to ensure optimum performance. www.helwigcarbon.com. 800.962.4851. Slot Bar Marking. Bar Edge Burning Copper Drag. Causes •


Enjoy!
Commutator wear patterns - Drives and Automation
Valid for casinos
Commutator wear patterns - Drives and Automation
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Comments
SLOT BAR-MARKING, a slightly dark- er film appears on bars in a definite pattern related to number of conductors per slot.
HEAVY FILM can appear over entire area of efficient and normal commu- tator and, commutator slot bar marking uniform, is quite accept- able.
STREAKING on the commutator surface signals the beginning of serious metal transfer to the carbon brush.
Check the chart below for possible causes.
THREADING of commutator with fine lines results whale slot machine excessive metal transfer occurs.
It usually leads to resurfacing of commutator and rapid brush wear.
GROOVING is a mechanical condition caused by abrasive material in the brush or atmosphere.
COPPER DRAG, an abnormal build-up of commutator material, forms most often at trailing edge of bar.
Con-dition is rare, but can cause flashover if not checked.
PITCH BAR-MARKING produces low or burned spots on the commutator surface.
The number of these markings equals half or all the number of poles on the learn more here />HEAVY SLOT BAR-MARKING can involve etching of trailing edge of commutator bar.
Pattern is re- lated to number of conductors per slot.
CAUSES OF POOR COMMUTATOR CONDITION Frequent visual inspection of commutator surfaces can warn you when any of the above conditions are developing so that you can take early corrective action.
The chart below may indi- cate some possible causes source these conditions, suggesting the proper productive maintenance.
Type of Brush Light Unbalanced Brush In Use Contamination Electrical Electrical Electrical Armature Shunt Pressure Abrasive Porous Abrasive Adjustment Overload Load Connection Field Light Vibration Brush Brush Gas Dust Streaking X X X X X X Threading X X X X Grooving X X Copper Drag X X X X Pitch Bar-Marking X Commutator slot bar marking X X X Slot Bar-Making X Commutator slot bar marking X HOW TO GET THE MOST VALUE FROM THIS CHART The purpose of the Commutator Check Chart is to help you spot undesirable commutator conditions as they develop so you can take corrective action before the condition becomes serious.
This chart will also serve as an aid in recognizing satisfactory surfaces.
The box chart above indicates the importance of selecting the correct brush and having the right operating conditions for optimum brush life and commutator wear.
For additional information or help with carbon brush application or commutation problems.
Contact your nearest GE Sales Office or Distributor.
WATCH FOR THESE DANGER.

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Patination limits commutator life! This guide helps you in making the judgement about the lifespan, commutation set and running behaviour of commutator by analyzing its appearance. Moreover, if you observe the symptoms of commutator damage, you can easily replace carbon brushes by following the steps mentioned in this guide. …


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Commutator Surface Chart « Electrographite Carbon Co.
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commutator slot bar marking

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A condition called slot bar marking is also normal if the commutator surface is smooth. The variable color occurs in a pattern according to the number of conductors per slot. A very dark surface is also a normal and an acceptable condition if the commutator surface is smooth. STEERING PUMP MOTOR NOTE: Some electrical trucks use a steering pump.


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Commutator Surface Chart « Electrographite Carbon Co.
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Commutator wear patterns - Drives and Automation
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Kitzel Commutator Tool Geometry (Drawing) Kitzel “Top of the Line” Commutator Skiving Tools (Drawing) Our “Top of the Line” Commutator Tool is an original Kitzel design. No other toolmaker can match this tool. Features: Cleans the slots of the commutator with drag over; Gives a uniform cut with minimum working pressure


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Commutator check chart, For comparing commutator surface markings, Satisfactory commutator surfaces | GE GEH-5304A User Manual | Page 33 / 45
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Commutator Assessment and Carbon Brush Installation - tossy.info
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Local time: 03:35 Explanation: pitch bar-marking обозначает износ определённой области поверхности коллектора, соответствующей половине щеткодержателей, и обычно возникает вследствие отсутствия осевого баланса, после чего начинает "разрастаться" и охватывает область, соответствующую количеству щёткодержателей нормального перевода этого вида износа opinion bar top slot machine dimensions agree на русский я, к сожалению, не нашёл SLOT BAR-MARKING - сегментный или периодический износ опять же, русского определения не нашёл, поэтому предлагаю своё.
Суть состоит в том, что ламели изношены в определённом порядке например, через одну, в результате чего ток генерируется неравномерно, возникают биения и т.
PITCH BAR-MARKING is the result of low or burned commutator slot bar marking on the commutator surface that equals half or all the number of poles on the motor.
HEAVY SLOT BAR-MARKING involves etching of the trailing edge whale slot machine commutator commutator slot bar marking in relation to the numbered conductors per slot.
Reference: France Local time: 08:35 Works in field Native speaker of: Russian локальный износ коллектора Commutator slot bar marking pitch bar-marking обозначает износ определённой области поверхности коллектора, соответствующей половине щеткодержателей, и обычно возникает вследствие отсутствия осевого баланса, после чего начинает "разрастаться" и охватывает область, соответствующую количеству щёткодержателей нормального перевода этого вида износа коллектора на русский я, к сожалению, не нашёл SLOT BAR-MARKING - сегментный или периодический износ опять же, русского определения whale slot machine нашёл, поэтому предлагаю своё.
Суть состоит в том, что ламели изношены в определённом порядке например, через одну, в результате чего ток генерируется неравномерно, возникают биения whale slot machine т.
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Bar Edge Burning and Slot Bar Marking are somewhat "cousin failures". Pin pointing the true cause of Bar Edge Burning is problematic because more than one reason or scenario can create the same/identical visual appearance on the commutator. In studying the original posted photo again... I'm leaning toward a new "armchair" theory


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pitch bar-marking | English to Russian | Electronics / Elect Eng
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commutator slot bar marking

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The commutator slot shaver is a simple little hand tool to lightly chamfer the edges of commutator bars after undercutting. Made of hardened high speed steel, it can be quickly resharpened on a grinding wheel.


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Electrical Machine winding diagram(AC & DC)

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Performance of Carbon Brushes CommutatorAppearance In addition to the physical appearance of the surface of the commutator, the skin or patina is of Normal Skin or Patina Formation equal importance for the good running of the carbon brushes. Each carbon brush builds a characteristic patina which is affected by operating and ambient conditions.


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Commutator Assessment and Carbon Brush Installation - tossy.info
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pitch bar-marking | English to Russian | Electronics / Elect Eng
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Commutator slot cutting machine commutator mica undercutting machine WIND-8066-FD Wind Automation

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If not corrected, this condition can cause severe commutator damage or a flashover. Slot Bar Burning - results in commutator erosion of every second, third, or fourth bar depending on the winding design of the armature. Improper brush material, brush design or electrical adjustment of the machine can cause this condition.


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Commutator wear patterns - Drives and Automation
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Undercutting Gooves