Im having some issue’s with one of my JRK 12v12 motor Controllers and after some testing i think im dealing with a Faulty board.
About a year ago i bought 2 JRK12v12 to use in my 2dof motion simulator, had big plans when i ordered these but after receiving all the parts i sorta lost interest in this project up until a few weeks ago.
I’m now to the point where i have everything connected and i can start to test out the electrical part of this build and it all started out really nice and easy, got the 2 motors running in Serial mode fairly quick and after playing with this mode for about 15 minutes one of the motors just stopped spinning, then turning on again by itself and after that it just randomly stops and go’s whenever it feels like it
So the first step was switching the motors but the problem stayed so it was coming from the wiring or the board, checked the wiring and just for testing sake i also switched the wiring from one set to the other but that didnt help.
I started to compair the settings in the JRK software and they were all the same so no luck there but then i spotted something, the “faulty” board had about 6000 errors for the max current exceeded while the other one had about 50, and those were from switching the motor hard from left to right and back.
After seeing this i disconnected the motor leads from the board and watched the error page, there were moment it didnt throw errors so the motor would have spinned, but there were also moment the error counter was going beserk, giving about 10 hits every second and sometimes lasting 20 to 30 seconds.
So i connected the motor back up and just like i thought what would happen, the motor stops spinning when the errors start to count and vice versa so i can fairly say its the board itself thats acting up.
Ok, with the knowledge of maybe having one faulty board i continued hooking up the potentiometers just to get on with testing as i really wanted to see the motors react to the pots, logicly i started with the board that didnt had any issue’s just to be sure the motor would spin while i’m testing.
Connected the pot and got a perfect feedback signal from 0 to 4092, it was working so good i could make a perfect sinus by hand over and over again in the plotter haha. anways,
Couldnt get the motor to do anything with the pot though (and still cant) but thats another question all by itself and ill ask that later if i cant figure it out.
At this point one board and motor combo is working fine including the feedback signal so i could move on to the next.
Connected the second pot to the “faulty” board and you could of guessed it, the feedback signal is way of and it only goes from 3000 to 4000 with some dips in between to the 700/800 range, the easyest thing i could think of was a faulty pot, these things also layed around for a year and maybe one of them went bad, luckily i could switch the connector from one JRK to the other so i didnt have to test wiring and so on but again the problem stays with the board, also tested both pots on both boards just to be sure and the pots work fine on that one good board while the other one is giving the same symptoms with both pots.
After knowing all this i also tried switching usb cables, usb ports and Power supplies but to no avail, one works fine, the other one doesnt.
is there any more i could do or test? or is this board dead on arrival?
Thanks in advance.