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

[value1]

Just search on youtube for it. There is a crazy australian nutter with a funny voice that will show you how to do it

What could be easier than soldering surface mount. ROTFL!
(I'm glad when I manage to solder thick cables!… )

[sirnoname]

I daily solder here the smallest resistor you see there in the first minutes. But I have a stereo microscope to do that.
Do use non ROHS conform tin-solder because it works much better.

[yokoyoko]

I daily solder here the smallest resistor you see there in the first minutes

I saw some of sir's equipment in his private lab
I will not imagine what he (and others) are doing at work.

I'm with value1

I'm glad when I manage to solder thick cables!…

This is my kind of standard tool:

220px-Vorschlaghammer.jpg (18.51 KiB) Viewed 3359 times

[prodigy]

I saw some of sir's equipment in his private lab
I will not imagine what he (and others) are doing at work.

Now we know where they are shooting "Breaking Bad"

Season_2_poster.jpg (1.01 MiB) Viewed 3342 times

While waiting for Pololu's answer, I wanted to test at least other JRK to see how will it go, and boy, those fans are keeping the JRK almost ice cold What a nice feeling to see that everything is moving well. A big relief for me. I've tested the motor with Assetto Corsa and rFactor 2, didn't mess a lot with making profiles, I want to do a quick test and tested only with brake / acceleration.

First 15 minutes went well, I've checked JRK tool for driver errors and saw there was 5 motor driver error which I didn't even noticed. Comparing to last test where I had hundred of them after two minutes of working.

I did some slight changes to PID, making the motor moving less jerky, then I've let the computer driving in RF2 and after 10 minutes, not a single motor error, YEE-HAAA

Here is just a short video of motor moving

[motiondave]

Looks good.
Well done with PID, that can stop a heap of errors.
As you may have noticed, big motors are good, but the faster speed is a tad harder to control.
Oh and expect the heatsinks to get hot if you really run them hard.

[tronicgr]

I daily solder here the smallest resistor you see there in the first minutes. But I have a stereo microscope to do that.
Do use non ROHS conform tin-solder because it works much better.

Yes, it totally doable to replace that resistor... Its very easy with hot air rework tool. Nowadays I work on PCB's replacing tiny SMT resistors and capacitors with just hot air under a Mantis stereoscopic microscope...!


Thanos

[prodigy]

As you may have noticed, big motors are good, but the faster speed is a tad harder to control.

Yes, I've noticed that and I didn't even use the full cycle duty. I will need to spend some time making a good profile, some mean filters, smoothing maybe.

Oh and expect the heatsinks to get hot if you really run them hard.

I will go easy on them for starter, can't afford to blow one up

Yes, it totally doable to replace that resistor... Its very easy with hot air rework tool. Nowadays I work on PCB's replacing tiny SMT resistors and capacitors with just hot air under a Mantis stereoscopic microscope...!

I got the answer from Pololu, I think I got lucky with my mistake:

Hello Marko,

The capacitor that was lost connects the AUX pin to ground. If you are not using any of the AUX features, the Jrk should work fine. However, if you plan on using that pin, you should replace that 10 nF capacitor. It does not have to be a surface-mount cap: you can use a through-hole cap on the nearby AUX and ground pins.

As far as I know, we don't use AUX pin, only GND, 5+ and FB (Feedback).
I'm gonna try that JRK, but even so I'm gonna look up for someone of my friends if anyone got equipment to fix the capacitor.

Yesterday was a disaster day for me, today very happy

[motiondave]

well done! looks like you are on your way, in that case, plug in the jrk and test in utility.
You will not blow the jrks that easy. I have had mine at 34amp continuous and 38-40 amps peak. The heatsink burnt my finger , but the jrks didnt stop.
Obviously since then, I have sorted PID and speed control, so I still get great motion without abusing the jrks too hard.
Again, good to see.

[prodigy]

I did some testing with both JRKs today, damaged one worked fine. Left the autodrive in RF2 for 15 minutes, JRKs got a bit hotter but nothing noticeable hot, just a slight feeling on the finger.

I did get some occasional driver errors, also nothing noticeable while working, but I've saw them in JRK utility. I'm thinking those could be related to pots maybe, when fast motions are present it maybe gets out of sync. The PSU's are fine, 50A strong, I doubt it is them making the driver errors.

I will mount the other parts of simulator tomorrow, wheel, gearbox, pedals. Today I've mounted only the seat. I yet need to do a test with proper load, myself, and that would be a load of 105kg

Here is a short video todays testing

[motiondave]

Oh yeah......
Ok, errors, once you are actually sitting on the sim, you may stop errors. I found on AI runs, my sim can error, because the pots were going a bit too far without a load on it.
Increase feedback zone from 0 to 2 or 3,
Also, try to see at which point the motor board is giving you an error, I also found I had the change the absolute maximum and absolute minimum figures in the feedback (not the number I found while setting), to allow the pot feedback to go further to help get over this.
Cheers, David.