Treadmill motor/controller Potentiometer?

I bought the treadmill motor and controller setup from Surplus Center
and now need to buy the potentiometer. What do I need? All it says is
5k ohm pot but what am I actually looking for and where do I find it?
I'm going to use this on a 6" Atlas lathe.
Thanks
Tom
Reply to
tgaran4
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Radio Shack is probably the easiest place to buy one ... just ask for a 5K (5,000 ohm) potentiometer.
If don't know what they look like, do a google search to find out. A pot is just a variable resistor... 0-5k ohms in this case.
make sure y ou get a LINEAR taper...not an audio taper... Linear means the speed goes up "in sync" as you turn the knob up.
Audio taper is based on Db's, which is logmarithic scale -- a small turn at the middle to end of the rotation means a LARGE change.
New pots cost around 3-4 bucks at Radio Shack.... any surplus electronics house (look in t he yellow pages) will have used one for 50 cents or so.
And be sure to wire it correctly.. usually the left most terminal WITH THE SHAFT UP AND FACING YOU, and the pot turned all the way counterclockwise is wired for zero speed, the middle terminal is the wiper and the rightmost termimal is wired for max speed. Use a simple ohm meter to check it, although if you are not sure what a pot is... you probably don't have one...
Steve
Reply to
Steve Koschmann
There are several good documents in the dropbox retired files from about 98 or so. I put one on a 6" Atlas lathe and it was wonderful. There are mods you will probably want to do to the PCB and they are detailed in the dropbox files too. I wired mine so I could reverse it and that was really handy. You wouldn't want to reverse it for extended use as the brushes are biased to run in one direction so you loose a little efficency in the reverse direction. Glenn
Reply to
Glenn
I had the same issue. You need a 2 watt 10 K pot linear taper with a knob and legend plate.You can get them from McMasters or Mouser for a few bucks. Radio Shack doesn't seem to carry many components just a small selection. Too little profit from small sales I believe.
Hope this helps.
Reply to
geebee509
A 5K ohm pot... JR Dweller inthe cellar
snipped-for-privacy@comcast.net wrote:
Reply to
JR North
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?Ref=4408&Row=577544&Site=US is probably a good match. Allied Electronics or Mouser would also likely carry them. You will want a linear pot (not logarithmic), the other common choices will be related to style of mounting and shaft type. These can often be found surplus for $0.50 or so.
Regards, Bob Headrick
Reply to
Bob Headrick

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