I have a MC1000 treadmill motor controller,I thought it was more like the MC2100 but as I've been testing the scr voltage is more like the MC60. From the MC1000 to the control panel it has 5 wires in a 6 pin, Black, red, green, blue and Black with white, red has 12 volts dc green 5 volts dc, blue when running 1.4 - 11 volts dc, I can disconnect the green and the motor still runs fine. Now to my question, can I just use a pot, or do I need to build a pwm circuit like the one I found on this site with the 555 timers?
Thanks in advance.
I'm going to use on small wood lathe, the motor is 2.65 hp @ 130 VDC 1977 watt, 1.5 hp cont.duty 95 VDC/ 1119 watt, full volts on 110 ac is 90 VDC, from controller.

 

 

So a 5k linear pot works good a 2k might be better but I don't have one right now, I did try a 10k not much control. On the 6 pin plug in upper left of controller picture black to one side of pot red to other side and blue to middle.

 

Hey minerwelder. Can you describe how you were able to use a pot to control motor speed on the mc1000 a bit more in detail? Maybe some pics with the pot hooked up or more pics showing it wired. I have the same controller but get nothing when I hook it up the way you described it. My wire diagram shows the 5 pin plus wire sequence opposite of your picture too. It shows from top down the color order being black, red, green, blue, black/white. Your pic shows the same order but looks like the plug is flipped 180. Are you using just a pot to control speed or are you still running that 5 pin plug to the other board that it originally would hook to on the treadmill? I’m trying to just use the mc1000 control board and a pot to control speed like you would with an mc60 controller. Is that what you did? Any help would be greatly appreciated. Thanks.

 

I just ran into the same issue as Audiogeorge above.

 

Never actually used the MC1000, just the MC-80 and the MC2100.
But have seen conflicting info, one manuf sheet said it requires the PWM signal the same as the MC2100.
But some have said it runs with both Pot or PWM.
Check the RED, BLK and BLUE top left connection, some sheets show the connector backwards.
Max.

 

I know this is an old Thread but Curious if anyone got a potentiometer to work with the MC-1000 Controller Board? I have the same one and have connected it every which way. No joy here.

 

Apparently the OP got the 5k to work in post #3.
Didn't say what pins on the 6pin though.
Max.

 

Apparently the OP got the 5k to work in post #3.
Didn't say what pins on the 6pin though.
Max.

But wire colors and voltages are mentioned. From the first post I get:
-5 wires in a 6 pin
-black -> I assume ground or '0'
-red 12 VDC -> power supply?
-green 5 VDC, this can be disconnected and the motor still runs fine
-blue when running 1.4 - 11 VDC -> speed adjustment with voltage?

From #3 post:
-5k linear pot works good
-black to one side of pot
-red to other side
-blue to middle

Seems to be a normal potentiometer connection, where potentiometer middle/wiper voltage can be changed between 0 -12 volts in order to adjust the speed.

 

I've followed those instructions with one exception. The only pot I have on hand is a 500k ohm used on old commodore paddles. Could this be my issue?

 

I've followed those instructions with one exception. The only pot I have on hand is a 500k ohm used on old commodore paddles. Could this be my issue?

I would add, the controller came out of a working treadmill that I had removed all the components from. I have the MC-1000 board, the choke, the switch, and the motor laid out on the bench. Still wired together as they came from the treadmill. Interesting note, there are four LED on the board. None of them illuminate upon plugging in the power and turning on the switch.

 

I assume you have all the power leads in place, the later models have a thermal switch terminals.
500k is a little high, usually 5k - 10k is normal.
Do you have any voltages present?
High voltage DC and the 5vdc?
Max.

 

The schematic states that voltage across the pins will show less than 1.5 v on most meters -- I'm getting less than that. The board is getting 110v on the supply side. There is a ceramic resister/regulator on the board that measured 100V DC.

I have a MC-2100 board that works fine with this motor and another it came with. It allows me to control the spindle with the PWM signal from LinuxCNC. No manual Potentiometer on it though. I Think I'll just pitch this MC-1000 board and just concentrate on improving the MC-2100.

 

I can give you a lead on the small board, picmicro based (100mm x 100mm) for the MC2100 that has pot and provision for stop/start PB.
For more info, PM me
Max.

 

I've followed those instructions with one exception. The only pot I have on hand is a 500k ohm used on old commodore paddles. Could this be my issue?

10 k was already too high, based on post #3 "I did try a 10k not much control" so 500k is too much.

 

I can give you a lead on the small board, picmicro based (100mm x 100mm) for the MC2100 that has pot and provision for stop/start PB.
For more info, PM me
Max.

That board sounds like it would work. I'm also needing a polarity switcher so that I can run the spindle in reverse. I'm not sure, but I believe the way the reverse works is a signal would be sent from LinuxCNC which would activate the switch and allow the motor to change directions. Obviously would need some boundaries around that so that it would only switch direction once the motor was idle. I've heard of others doing this but not sure how they accomplished it.

I don't see a way to PM on this forum?

 

Envelope at the top right, I can try sending to you if you wish.
For reverse on the MC2100 you need a reversing relay at minimum.
Tyco K10P-11DT5-12
With this type of mod, you have to ensure the MC2100 is stopped first.
Max.