Y. Insufficient skin formation
  Possible Causes Remedies
2 Vibration from external causes, i.e. forge hammer Remove causes - mount machine on shock absorbers
3 Vibration from internal causes, i.e. out of balance Balance armature and check for bearing wear
10 Oil or dirt on common commutator or slipring Clean
11 Grains of abrasive in the brush contact face Rebed and clean brush face
14 Mica proud Recess mica or use a more abrasive grade
20 Spring pressure too low Adjust to brush grade
21 Spring pressure too high Adjust to brush grade
22 Spring pressure unequal Adjust spring pressure uniformly
23 Imperfect brush bedding Rebed brushes carefully and clean
29 Radial brush holders not in correct position Adjust holder to radial position, distance from commutator 2-3mm
30 Reaction type holder mounted trailing Reverse holders or direction of rotation
32 Worn brush holder Replace holder
34 Brush holder mounted too far from commutator or slipring Adjust holder to be 2mm from commutator
37 Humidity too low Humidify air  possibly change brush grade
39 Dusty atmosphere Remove cause, install filter
40 Gas or acid fumes in atmosphere Arrange for clean air cooling
41 Long periods at low or steady load Change brush grade - ask for our recommendation

Where we Are

Unit 1, 120 Shad Road,
Wadeville Ext2
South Africa

Mail Us

P.O. Box 673
South Africa

Contact Us

Tel: +27 11 824-1168
Fax: +27 11 824-1356

Email: This email address is being protected from spambots. You need JavaScript enabled to view it.