CHART OF COMMON DIFFICULTIES SECTION 4
T .Commutator has wavy pattern
  Possible Causes Remedies
1 Overload of machine Reduce and limit load
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
16 Commutator too loose Tighten, use new mica and turn
18 Commutator or slipring excentric Turning and grinding at near rated speed
22 Spring pressure unequal Adjust spring pressure uniformly
31 Brush sticking Check brush size - remove burns and dust

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Alberton
South Africa

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