[TheForge] Twister (Was:: housekeeping...)

[Bruce Freeman]

The bar(s) in a twister have to be secured on both ends.  Rig a
quick-release on the stationary end to stop the twisting motion.  Even
better, rig a thrugh-chuck on the stationary end (like from a lathe)
rigged to rotate, but with a quick-release lock.  That way you can stop
the twisting with the twister motor still running.  Some
counter-twisting of the bar is inevitable.  If it doesn't come out like
you want, relock the stationary chuck to continue twisting.
Bruce
NJ

>>> Mike Spencer <mspencer at tallships.ca> 10/25/2006 2:10 PM >>>

me> Somebody just gave me a pipe threading machine.  The chuck is
me> completely worn out...

LB> Sounds like a bar twister to me..

Yeah, maybe for yer Al Paley-style twisted, double-twisted,
gnarly-twisted and twisted into two pieces -type twists.  The gross
mis-alignment of the chuck would guarantee the "gnarly" part. :-)

Less frivolously, the motor runs on for a bit after power-off.  For
big heavy bar or cold twist, I supposed the resistance of the
workpiece would stop it but for lighter stuff it seems like it would
be impossible or at least very difficult to twist just the right
amount.

I'm guessing that a really good twister would have a stepper motor.
Didn't Paley use an elevator motor and gearbox to make the machine he
used for all that 1980s, twisted-to-destruction stuff he made?


- Mike

-- 
Michael Spencer                  Nova Scotia, Canada       .~. 
                                                           /V\ 
mspencer at tallships.ca                                     /( )\
http://home.tallships.ca/mspencer/                        ^^-^^
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