Nate's treadmill powered belt grinder.

Thread Starter

Rnnate

Joined Apr 26, 2018
15
Q2 is a SCR S4020L, a common device and should be no problem finding a replacement, hopefully that is the only fault.
Max.
Well I managed to Nuke that circuit board plus an extra one. I did come across another free treadmill so I'm trying to hook up the new one now. Maybe you could let me know how to hook it up. With how it is right now it pops the breaker instantly
 

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MaxHeadRoom

Joined Jul 18, 2013
23,594
So did you try and repair the blown one? It could have also taken out the MOC3052 opto isolator.
The controller you show now is a different type, PWM control.
Does it pop the breaker without the motor connected?
Max.
 

Thread Starter

Rnnate

Joined Apr 26, 2018
15
So did you try and repair the blown one? It could have also taken out the MOC3052 opto isolator.
The controller you show now is a different type, PWM control.
Does it pop the breaker without the motor connected?
Max.
I kind of hooked up the power feed and the motor incorrectly. It doesn't pop the breaker now. As far as repairing the blown one I nuked 20180501_231442.jpg more than just the one piece
 

MaxHeadRoom

Joined Jul 18, 2013
23,594
The fact that R12 & R13 looks blown it most likely took out the SCR Opto trigger IC U3 as well as Q2.
Testing it without the motor hooked up, the LED D6 should light when the pot is turned CW.
Max.
 

Thread Starter

Rnnate

Joined Apr 26, 2018
15
The fact that R12 & R13 looks blown it most likely took out the SCR Opto trigger IC U3 as well as Q2.
Testing it without the motor hooked up, the LED D6 should light when the pot is turned CW.
Max.
So i just ordered this thing hopefully this will work instead. Screenshot_20180505-094241_Amazon Shopping.jpg Screenshot_20180505-094304_Amazon Shopping.jpg
 

MaxHeadRoom

Joined Jul 18, 2013
23,594
That one is a fairly basic PWM controller so it should be a little less noisier and smoother running, but you should ensure the pot is at minimum at power up.
Especially if you retain the flywheel.
Max.
 

Thread Starter

Rnnate

Joined Apr 26, 2018
15
That one is a fairly basic PWM controller so it should be a little less noisier and smoother running, but you should ensure the pot is at minimum at power up.
Especially if you retain the flywheel.
Max.
Thank you soooooo much. Even though a majority of your replies are Chinese to me I really do appreciate the help. They were really cheap so I bought three of them just to be safe. I shall update you when all is done and working hopefully. The new treadmill I just got came with a Beefier motor. Not sure thats a real word. 15255449833195515567283621579023.jpg
 
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