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Posted by Steve Koschmann on April 27, 2006, 10:12 pm
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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
>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
>
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> 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
>