Trying to set the base plate to achieve the null point, I find my generator motors (rather briskly) in the clockwise direction. After lifting the third brush and turning the base plate clockwise gradually slows it to a halt. However, I cannot get beyond this point to counterclockwise rotation that I thought was needed to find the null point. Therefore I set it at the point where it will rotate clockwise with a little assisting twist of the gear. Is this an accurate null point?
But when I spin the generator at ~2000 rpm on the bench, it doesn't generate more that about 1 amp using a separate ammeter. Am I still not at the null/balance point or what else should I do?
What has been done to the generator?
Your experience is not uncommon.
Give me a call (859-881-1677 EST) and I will walk you through significantly easier procedure to set the null point.
There were some older repo field coil that was made wrong that you don't cross the leads? If it's newer did you cross the leads?
That is not Don's problem. If the problem were one of a backward wound field winding the generator would only motor counterclockwise.
His problem is finding the "trap for logical folks" and very pesky third brush regulation generator "null" point.