15-06-2021, 11:01 AM
One of the issues I have experienced with a chum's bacon slicer motor being very slow.
Is.
Somebody who had been there before me had cut the mica out between the com segments as you would do with a dynamo.
This done on a starter is a disaster.
The groves between the segments fill with a mixture of copper and carbon and the starter gets slower and slower until it does not work anymore.
The only solution for this is to turn the com down until there is mica at the top once again.
Or if done too deeply - find another
Starters turn slow and have big loads.
No centrifugal cleaning here.
Dynamos on the other hand are different and must have the mica on the com undercut.
The difference being that they spin very fast and their brushes are largely carbon (no copper) so are kept clean due to centrifugal force.
This is of course providing the charge rate is kept to a low level. The big dynamo killer is having the charge rate set too high.
Is.
Somebody who had been there before me had cut the mica out between the com segments as you would do with a dynamo.
This done on a starter is a disaster.
The groves between the segments fill with a mixture of copper and carbon and the starter gets slower and slower until it does not work anymore.
The only solution for this is to turn the com down until there is mica at the top once again.
Or if done too deeply - find another
Starters turn slow and have big loads.
No centrifugal cleaning here.
Dynamos on the other hand are different and must have the mica on the com undercut.
The difference being that they spin very fast and their brushes are largely carbon (no copper) so are kept clean due to centrifugal force.
This is of course providing the charge rate is kept to a low level. The big dynamo killer is having the charge rate set too high.