DIY 2DOF

Hi @Pit thank you for your complement on my rig so far
SMC3 as follows:-
Kp has been set at 180, 220, 350, 400 and 500
Ki 0
Kd 0
Ks 1
Pwmmin 0
Pwmmax 180, 190 and 200
Pwmrev 0, 180

It happens quite randomly but within about 3 mins of dirt rally on any stage I try
And Assetto corsa only tested on monza about the same time frame

Only using sway 35% surge 35% and heave 30% thus far

Got a car battery charging and will test with that later

Cheers
Dag

Daguru please do the following or confirm if already tested:

Begin with PWMmax 120 and Kp 200, raise the value of PWMmax only if the motors did not stop to the next step, eg. PWMmax 130 and Kp 200 etc. If one motor stops, please report the result.
Then you do this: PWMmax 120 and Kp 200 but you raise Kp instead of PWMmax. If the motor stops (I do not think so) report the result here.

The test should be done always using the same car and track.

@Pit Thank you will test later tonight and report back

Hi @Pit,

Thank you Pit this test seems to have me stable so far, the one motor is a bit hotter than the other one so will get some cooling sorted for motors and then continue with the test, so far the results are as follows:-

PWMmax 120 and Kp 200 passed
Went up to
PWMmax 190 and Kp 200 motor stopped and wouldn't move until I quit SimTools and started SMC3utils and then it reset back into start position

Today I Started the second part of the test and before I could even start the one motor that keeps stopping won't move at all so swapped MM over a bang works well turned PWMmax up to 200 kp to 400 and still works I guess MM was on his way out will order a new one and see.

@Daguru the bottleneck is the MM. Order a second MM and follow this: http://www.xsimulator.net/community...cts-as-a-single-motor-driver-more-power.5482/

Hi
been off the project for a while but need help badly right now,
I now have 4 MM (did have 5 returned one as it didn't work at all)
Out of the 4 I have only one that works the motor both directions the others either cut out under load or only work one direction, so about 30mins from me there's a stockist of pololu jrk 12v12 so I went and picked 2 up and now I am getting motor drive errors by the bucket load

There's like a clicking sound from the motor when it errors both in game and when I use the slider in the input tab this happens if I am in the seat or not, settings are as follows







Thanks in advance

Going to re make the wiring so I have both a setup for MM and JRK so I can try more testing with both I don't mind which setup I use just need good stable system the motion I've had working I cant live without now

got choice on motors have 2 pairs

this one has 50:1 gearbox (can swap gearbox over with each motor if needed)


or this one 60:1 gearbox


thanks again

@noorbeast

Feedback has been set at 512 in most of the testing been trying lots of different settings
Yeah pots have been centred I've clicked detect motor direction and you get a tiny jolt to show they are centred, just before I took screen shots I was re-doing the feedback max and min setting using the learn button and might not have centred it for the pictures

Error message is motor driver error

CTC I've tried 70mm and 50mm

Thank you for helping

Thank you @noorbeast

I started from the beginning remade the wiring, followed the link you gave and then checked the balance of the rig, its not a full frame but the balance was off I think because when I first balanced it I did it low to the floor and this made me keep my legs out straight adding more weight to the front, not 100% sure what did the trick but now its working great I am very happy

hope to get a video up soon of it in action

Again Thank you all for your help

It looks to be a high speed 5000RPM motor (50:1 at 100 RPM), unfortunately these have been shown to generate a high back EMF when driven hard even from just the armature load (there is a thread somewhere that goes through this) and overload the motor driver. I would recommend you try one of @Pit high current MMs setups (two MMs driving 1 motor) http://www.xsimulator.net/community...bridge-60a-continuous-and-120a-peak-12v.6537/- all you can do on a JRK is turn down the acceleration and duty cycle until it stops.

Thank you @SeatTime and @noorbeast I will read through those links and run some tests off the info found

but for now a quick video of the sim in action




only using sway, surge and heave

Thank you @noorbeast I've not touched tuning center yet just got basic profile setup
Heave is max 1.04685491076608 and min -1.04685491076608 so what would you suggest as I have not read up much on tuning center settings yet.

It's crazy the hours I've spent on this site and still only seen a tiny percent of it lol

I have this exact same problem with my 50:1 ratio motors. It seems like motors over around 4,500RPM draw too much current when you try to reverse the direction of the motors.

Have a read of my build thread and I talk a lot about it. I have some videos of some of the testing I did with the gearbox removed. In the video you can see that the motor driver error only occur when the motor are spinning fast, if you reverse the direction at slow speed they are fine.





Have a read of my build thread from about here. http://www.xsimulator.net/community...er-gs-4-simvibe-gauges.5596/page-8#post-68644

In the end I got it going nicely by lowering the duty cycles and adding some brake duration.

I found that 250 duty cycle and acceleration with a 20ms brake duration gave me very few driver errors, some games have smoother motion so I am able to go up to around 300-350 duty cycles but I would start at 250 then work your way up until you start getting too many motor driver errors.

Here is a post with more about the brake duration.

@Avenga76 I was reading your thread just as you posted this lol thank you