Some months ago there were some posts about putting treadmill motors on Jet Minis, including a post about modifying the controllers. Being an info freak, I saved all that--but didn't save it to a CD. Sure enough, my computer bit the dust and I lost all those references. But I did get a couple of the motors from Jet, just in case. Well, my Jet motor bit the dust so I decided to mount the treadmill motor. Got that done, but now I need to know how to modify the controller to eliminate the delay. Anybody got any ideas?
Thanks, James Johnson
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Lyn J. Mangiameli
Search the archives on Wood Central Turning Forum for Mark Kauder & Jet. He has dealt with this in detail there.
Lyn
JR Johns> Some months ago there were some posts about putting treadmill motors on Jet
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dalecue
two of the replies I saved
you can always try Google Groups to search for the orig thread HTH
Yes, sounds like normal inertia and acceleration control in a DC motor controller.
Not a VFD, better than a VFD.
See how I retrofitted a PMDC motor for a Bridgeport milling machine:
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2) >I was given a treadmill recently that I took apart for the DC motor,
I am running my South Bend with a 3/4HP treadmill motor. Go to E-Bay and buy the KB Penta motor controllers they sell all the time. The controller for the treadmill has to allow for a lot of mass to accelerate, plus the lawyer fear of the runner turning the control up too fast and being slung off the treadmill. The $70 Grainger controllers also have a four second delay, unless you buy an add-on board for them. The KB Penta powers have acceleration adjustments, etc, and are going for around $50. They are the best PMDC controllers I have ever found. I keep buying them just to have them around. Forget the Minaric ones as well. I had a couple and threw them away. I have to say that changing from an AC induction motor to a variable speed PMDC is one of the best things I ever did for the lathe. I did it for my miller, too.
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