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I'm fairly certain the plate had been welded on at the factory
to reduce the number of speed positions to the three that an E12 has. Like
perhaps GE used the same control assembly for all the tractors and just blocked
out the upper positions when the assembly was used on an E12. Or perhaps
you're right and someone replaced a bad E12 assembly with one from some other
tractor. That may well be the case since the plate is very obvious when
looking down at the slots the lever moves in, and I would think that someone
would have jumped into this thread and volunteered that their E12 had a
plate.
I was too lazy to use a real pot. I would have had to find an
appropriate gear to connect the pot to the big gear on the assembly.
Worse, since the big gear continues to turn in the same direction as you go
from full forward to zero to full reverse, you'd actually have to use two pots
and switch between them or do some really tricky op-amp work. And then
you'd need a mounting bracket for the pot(s). It just sounded
daunting.
>>> Bill Alburty <wilbett earthlink net> 7/29/2002 12:35:42 PM >>> Bob, I assume your E12 came that way, modified by someone else, since you chiseled off the plate. Apparently you have a neat solid state controller fed by discrete speed commands. Why couldn't you put in a real potentiometer ( disconnect the micro switches) on the speed lever and get smooth speed changes out of your SS Controller. I'd like to have one. The pot apparently only has to handle 1/2 watt. I haven't opened up my speed lever yet to count my micro switches. Bill A. |