Prodigy's SimV2 - 2DOF - JRK's - ZYT90 DC Motors

[floriske]

I will try to do that, thanks.

One thing, does it matter if I have JRK utility open while playing? Will it conflict with X-Sim?

No it doesn't, I have the utility program running as well in the back ground.

Beware! Yes it does: the polling of the JRK tool will slowdown your jrk while it's open might not really be noticable though.

try not to set PID in the utility slider, set basic like I have suggested and then work with motion.
After 2 years of PID tuning, I have always found the motors to be very twitchy and getting errors in utility and even the old test tablet slider . The utility slider is mainly to test thatThe motor works and adjust feedback if need be.

I've discussed this with BobBuilt and the testsliders actually are a good tool for setting and testing PID, it uses the same control type as X-Sim does in game. Especially setting the test sliders to auto so the sim rocks is very handy because it's a constant wave motion. You can change PID settings while it's doing this and look in the JRK utility graph to see what the results are on the input and actual feedback.

The base PID suggestions exactly that , base. Then work with motion and change PID if needed as well as motor speed .
Try also raising integral limit to 10000 , this gives the JRK time to think and can reduce errors . Also match the timing in utility with x-sim. So if you have 10ms in utility, make sure it's 10 ms in xism.

Spot on! PID settings are different for every single sim and even motors of the same type.

[motiondave]

Ive never noticed the jrk utility program running in the back ground slowing the motion, ever. Mind you , i run a AMD 6 core with 16 gig of ram, that would compensate.
There is no real need to run the program in the back ground unless you are making changes.

[prodigy]

I have made some progress with "motor driver error" and PID, I've found a good setting but I still get some occasional driver error.
I think it could be related to my power supply.

Since I'm still waiting for my 2x PSU 12v 45A to arrive, I have tested this one motor on 12v 30A. Could that be a problem for driver errors?

I've read about Floriske's 30A PSU blown up, but as mine didn't explode I thought it could handle it.

[motiondave]

The motor driver error is usually associated with a feedback problem. Not so much a problem, just a profile adjustment. Try adding collision effect to the force as this will help stop sharp spikes and reduce errors. It did for me.
Motor drive errors the motor going past the feedback endpoint.

[prodigy]

I've finally received 2 new PSU's yesterday, 12v 50A, it took more than 40 days because the idiots on customs haven't send me a notice that package is there and they hold it for like 2 weeks until I've find out that it's there. Now I can finally continue with my project.

I've quickly tested one of the motors yesterday and I've find out that "exceeded current" and "motor driver" errors which I had with weaker 30A PSU are gone, tried Assetto Corsa and I got normal movement, until the point when JRK got really hot, then I got motor driver errors again.

I've checked the JRK and noticed that my cooling sink has felt of, it was so hot that even plastic glue got weaker and sink just slided off the thermal paste. I turned off motor, leave JRK about 10 min. to cool off with a fan, reattach the sink again and fired it up again. Went into utility panel and moved the feedback slider for a bit to check if I'll get errors. At first I didn't get no errors but after a two minutes or so, they got back occasionally. I've checked the JRK and the damn sink detached again, the chip was very hot and I think this is also the reason for motor driver errors. Everything works fine until JRK heats up, and they heat up faster because of big motors.

I'm going to do some other solution for the falling sink, gonna clean up the chip from thermal paste and go with thermal tape and some plastic glue around blue terminals to keep it tight.

[motiondave]

I used cheap thermal paste and the biggest heatsink I could fit on it, then araldite on the edge of the heatsink and glued it to the edge of the blue screw terminals. Then I sat a high air flow 120mm fan over them to run all the time.
It worked for me and I have had my jrks at 38 amps continuous.
So hopefully you get your sorted out.

[prodigy]

Yesterday I had some time to play with JRK's and cooling system.



I couldn't find some normal heatsink, everything I've got from old CPU's were too big, so I've needed to cut something I've found from old graphic cards. Finally keeping all that old computer garbage turned out to be helpful
I've put some thermal paste on JRK chip, put a heatsink with small fan on it and glued the sink with plastic glue on the blue terminal. The problem is, if the heatsink gets too hot, the plastic glue will melt and heatsink will fall off. I'm gonna see if this would happen again, if it does, I'm gonna take MotionDave's advice and glue it with proper strong glue.

Later on I've decided to make some place to keep electronic on it, bought a piece of cheap black painted wood, cost about 4$. I think the small fans on the JRK's and 2 big fans on top would do the trick with keeping JRK cool, or to better express myself, prevent them from overheating.



I need to figure out how to mount the JRK's on the wooden plate, the holes on the JRK's are very small.
I wanted to do it with motherboard screws like this ones, but even they are too big for those holes.



I will try to do it like Floriske did, with some peace of foam between JRK and wood, and screw it with some thinner screws.

I hope the cooling on the JRK's will be fine.

[mario318i]

Hi!

looks very nice! i think the cooler on your JRK should be more than enouth.
mine are much smaller, but higher.
YES, the holes in the JRK´s are very small. I glued them on a plexyglas sheet and than scewed this down.

[prodigy]

Unbelievable what just happened to me



I've accidentally scratched the small resistor or whatever it is with screwdriver when I was trying to screw that small bolt. On top of all, that tiny resistor felt in my carpet and there is no person in the world who could find it. What a luck..

I've tried to plug the JRK in the USB to see if it's working and it is. But even so, I don't know how important that resistor is, I think I'm gonna need to buy new JRK. There is absolutely no chance that warranty can cover this, I can only hope that people from Pololu would have some sympathy and give me some discount for the new JRK..

Unbelievable, the electronics were ready, everything prepared, today was the day to finally turn on the simulator and drive..

[motiondave]

Bugger, still send an email to Pololu and admit stupidity, they may offer a discount

I usually hot glue my jrks to something to avoid such incidents.