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A bit of progress on 'Scooter' today....
I bored out a beautiful little brass worm gear that I had until it was
a snug fit on the RA axis sleeve.
The sleeve is a threaded alum tube with a tangent clamp which grips
the section of RA thread with almost nil play.
This, for now, will do as the RA shaft.
I used an old VCR head as a mandrel to enable me to bore it out
to the right size.
I also made the first of two pressure plate clutches. This first one
will screw/bolt directly to the RA shaft and the other will clamp
the worm gear from the opposite side to provide slip/drive
pressure, just like on my big GEM.
The worm carriage is also shown, minus the thrust ball races.
I will probably run this through a 150:1 gearbox that I have and
use a 400 step/ rev stepper motor.
Steve
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