MC-30 motor controller

So i bought a 5k linear pot from radioshack and still have the same problem the motor starts then stops starts then stops at low speed its fine but once i raise it a little more it starts then stops. I tried tinkering with the max, IR, Cur pot and still will not work correctly.

For the heck of it, try a 100watt lamp as a load, see if you get the same results.
Max.

Ok i tried that, the response to illuminate the light is very slow, it takes a 1/4 turn to start illuminating using pot and goes until full bright this was with a 40watt diden;t have 100watt. The motor on the other hand goes ok until 16volts then the motor cuts in and out. I have a question though i started this discussion on another forum with very little help this one seemed to be the most helpful/ knowledgeable. The motor is a treadmill motor 90v 4700 rpm 10amp Runs CW. One thing that was not stated was the motor has 3 wires a black red and green the green at the moment is not being used.
Would that cause the issue?

Oh and response on increase motor speed is Laggy.

The green is ground and will not normally affect the running of the motor.
Did you test the motor on another source such as automotive battery?
If the motor is labeled CW it is usually for one of two reasons, the brushes could be offset or the pulley is threaded on, and reversing is likely to spin it off.
On the threaded pulley you normally remove this for drill/mill/lathe usage, and then can run either direction.
Max.

Haven't checked with a 12 volt battery will try tomorrow, the original pulley was removed and held in with a allen screw

I did try that and it ran perfectly fine and at a constant but then again the problem arises after 16v

any other ideas? I c some setups that have big resistors going to the motor am i missing something that will amp the voltage. I havent checked the amps maybe its spiking above the boards ability even though its 10 amps but that's at 90v would it draw more at a lower voltage?

I assume you are trying it off load?
It should start up with less current if you have the flywheel off.
Your sure there is not digital tach feedback required? Most T.M.s have these.
Do you have a smaller DC motor you can try?
Max.

The original pulley was removed. I can't find a motor to try over 12v. How do I know if motor has digital tach

Evidently the MC-30 is a smaller version of the MC-60, pdf's attached.
Is this the original motor that was used with the drive you have?
Max.

no its not its a Bladez 2.5hp i was told the mc30 could handle it.

That could be part of your problem, the MC-30 is the lower current version of the MC-60.
Max.

I was told from another forum that i needed a treadmill transformer to solve that problem.

Porsche650 said:

I was told from another forum that i needed a treadmill transformer to solve that problem.

Click to expand...

???
Never heard of it, any details?
Max.

fixed my problem by using a mc64