[TheForge] Twister

[Peter Fels And Phoebe Palmer]

There was a local story about an old guy with a string of 
successively heavier trannies set up with u joints, all nose to 
tail for his twister. It had a dinky electrical motor to drive it 
and was mounted on a 20' Ibeam with rings welded as guides down 
the length. Guy said they'd set it up, plug it in and go to 
lunch...Pete F

Ries Niemi wrote:
> Paley's twister was reputed to be an elevator motor, something like 25hp.
> I have never heard if it had a stepper type motor, but I think not.
> 
> I have a german made cnc twister, and it uses a brake on the motor to 
> achieve accuracy to one degree of rotation.
> Which is nice, for specific stuff, but I find for fancy reverse twists, 
> I usually use it in manual mode, and just stop when it looks right.
> Of course, at something like 14rpm, its pretty easy to move it in very 
> small increments anyway.
> 
> The ornamental yards that twist 20 foot lengths of 1/2" square bar for 
> window grilles just use a 10 or 15hp motor run thru an old truck 
> transmission to slow it down, and clamps on a big piece of I beam. The 
> guys who run those machines just eyeball the twists, but after the first 
> 500 or so, you get pretty consistent.
> 
> I imagine you dont see this much up in Nova Scotia, but in LA, Arizona, 
> and Texas, where spanish style houses are common, there is at least one 
> big twister in every major city, with a guy working all day going thru 
> entire bundles (usually 2000lbs) of 1/2" square, twisting away.
> 
> ries
> 
> 
> On Oct 25, 2006, at 11:10 AM, Mike Spencer wrote:
> 
>>
>> 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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> Ries Niemi
> Industrial Artist
> 
> http://www.RiesNiemi.com
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