PWM Solenoid test board adjustment fault
PWM Solenoid test board adjustment fault
(OP)
I have a PWM solenoid driver test board. Basically a little board which I feed 12v, hook up to a solenoid and a 3 pin pot. I have 2 of these working in conjunction for a bi directional test box I use. Each board has 2 adjustment screws. One if for the minimum bias and the other is the range.
I usually have these set at 500ma min and 800ma max but I need to adjust them occasionally for different applications. Yesterday I was using the box and one board decided it's range was fixed at 120ma. I couldn't lower the min bias and if I raised the range, it would move the min bias with it up and down where ever it went.
My question is, is this board broken completely?
Sorry for using incorrect terms, I am not an EE.
Thanks
I usually have these set at 500ma min and 800ma max but I need to adjust them occasionally for different applications. Yesterday I was using the box and one board decided it's range was fixed at 120ma. I couldn't lower the min bias and if I raised the range, it would move the min bias with it up and down where ever it went.
My question is, is this board broken completely?
Sorry for using incorrect terms, I am not an EE.
Thanks





RE: PWM Solenoid test board adjustment fault
Now the replacement board won't work properly either. What is going on?
RE: PWM Solenoid test board adjustment fault
RE: PWM Solenoid test board adjustment fault
The simple answer is: If black and smelly - yes, completely broken. If original colour, then it can be fixed. But otherwise, I agree with OperaHouse.
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: PWM Solenoid test board adjustment fault
When power is supplied to the board, the LED lights up and when I turn the pot my solenoid activates but the whole point of these boards is that you can set the current minimum e.g. what the current output is when the pot is at minimum and what the current is at the maximum pot setting. Usually my range is 300ma or more but for some reason, this has dropped to 120ma. I would adjust the range and it would change the min bias as well for some reason.
All 3 boards still work, I can set each to output a certain value BUT not the variation I want.
Does that help? I can't take a picture at the moment. It looks similar to this. Link
RE: PWM Solenoid test board adjustment fault
I'm afraid we cannot help. You should really either contact the supplier or find someone near you that can have a look and do some measurements.
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.