Need help, my motor sway when stopped...

WIP... I 'm working on a project like 2 Dof Tutorial from Racingmat.
but I 'm in trouble, sway when stopped?? and i don't know why it happend?
only little knowledge of electronics
help me please...
Parts: Arduino, Monster Moto Shield, PSU 12V 30 Ampere, Motor Wiper DC 12V + Potensio B10K.

I am have a similar issues mine is more extreme however. I have built a sim before using all the same parts save for the motomonster driver board where last time I used a pololu. I will post my video here aswell in hope someone like racingmat can help.



My power is the same dell 12v 41a as before.
My second issue which I don't know is related is one motor not moving while the other is maxed out using the axix texting as seen here



Sorry I couldn't help you but hopefully the threads activity will generate a solution.

It looks like the control loop is under damped for that motor/driver/feedback combination. That is typically corrected by the gain setting in the software. You may find that when you put load on the motor (sit in the seat) is it not a problem. Otherwise reduce the gain setting in software. @RacingMat can probably assist with that, I'm pretty sure it is just a value change on one line of his code?

@james wheeler - I've commented in your other post.

Thank's all..
i'm not understand about Code in Arduino IDE, but..
I Have Tried to change some (a bit) code in it (from Racingmat 2 Dof Wiper truck). and... still it happened
I hope will have real simulator can sucseed like this... (my 2 dof mini servo)

Need help to finish this project,
I also want to be able to play like you , using a simulator at home (DIY).

@abah_masha
nobody reported such a behaviour...
you will have to describe more of what you have done and show more of your hardware (pictures of pots, wiring, windows USB port, Simtools screens...)

you have done something different and the recipe is not working...
can you give more specifications about your motors?

@james wheeler : please post in a dedicated post (otherwise it'll be become more complicated)

@both of you: did you change anything in the code?

hello @RacingMat I have created my own thread you can find here.

http://www.xsimulator.net/community...ping-issue-mm-driver-and-ard.7973/#post-97195

It has a 8 min video with a full rip down and replace of each part from wires to motor to pots. I even toyed with your code. Changing the int tol from 20 to 10 then to 60. Still after that it still has a issue. lesser but still there.

ok @RacingMat , I 'll do your suggestion soon..

yes I do , occasionally , as this remains the case , then I return to the original code. Then look for another error , possibly in hardware ..

@abah_masha : same as James, try only with the Arduino serial monitor: do you have this oscillation?

Yes I do I tried with nothng runing other than the monitor and still it continues.

@RacingMat , this is my wiring and simtools screens..

Hi @noorbeast ,
I have done it before, 60% in simtools, but my wiper motor only rotate 40 degree, sway when stop still hapend and i don't know why? then I do 100%, and i get about 90 degree rotation. "sorry for my english"
Thank's for link.. I will do like it soon.

Your wiring does not look good... Only 8 wires required between arduino and motomonster. And Pots have to be linked to arduino directly (if motomonster is not stacked onto the arduino)
Follow the resources description http://www.xsimulator.net/community/marketplace/arduino-code-2dof-and-2-pins-direction-hbridge.67/

@abah_masha if the behaviour is still the same as the first video you posted then your system is really working as expected. What you are seeing is overshoot from the motor positioning (technically referred to as an underdamped feedback system). This is corrected with the gain parameters in your software. The diagram below hopefully shows what I am referring to...


As far as I can see in the video the motor moves to the position you request, therefore mechanically, electronically, software, is all working, just needs some fine tuning.

If there is something else happening that isn't shown in the video let us know.

@RacingMat. verry sorry.. oh I have wrong to draw . potentio cable to hole A4 on arduino.. sorry... this is my wiring revision
for that link, are diferent with your diagram wiring that first i look before (in tutorial DIY wiper truck).. where i must connect potensio cable.. to A0 or A4?

Hello @RacingMat. I just remove A0, A1, A2, A3 in arduino from Motomonster, it works fine. ( but the sway problem still happend).. I follow all steps on your tutorial before (wiper truck), what am I missing? the different my parts is PSU 30A and my 12V DC motor wiper. Then in link http://www.xsimulator.net/community/marketplace/arduino-code-2dof-and-2-pins-direction-hbridge.67/ if i connect potensio to A0, the motor always rotating, where the code IDE for this?

Yes... I thought so , what step to fine tuning for fix this. (many question in my self, change some Arduiono IDE code or another on simtools, or are different parts in Indonesia)? I haven't experiece about code and electrical. Btw, I not run the game, only game engine of simtools to check by sliding for movement.

your system is overshooting like @RufusDufus said
but I don't know why because dozens of sim have been made and none needed any tuning in the code for oscillation

@abah_masha maybe your motors are a bit odd... I would advice you to test another Arduino code like SMC3 which allows to tune the gain easily
http://www.xsimulator.net/community...-3dof-motor-driver-and-windows-utilities.122/

I don't think your arduino is broken
but you could try JRK instead of Arduino+Motomonster because JRK does not require any coding

Yeah, I think so. I have 2 motor at home, 1 broken, and this still work, but the speed rotating left and right are different.
What is causing all of this is happening.
ok racing mat, thanks for link another tutorial.. I am trying scm3..

I had the same problem. I am using wiper motors too however mine are from a Ford escort. There is 3 wire configurations on them. Slow, fast and really fast. My wire configuration are as follows. Black & blue are slow, black and red are fast and red and blue are stupid fast. When I started I figured the middle option was the best but after ripping everything apart and playing with a lot of the codes inputs I thought maybe I will try it on slow and bang it works fine. Even with racingmats original code. Everyone wants more power . but power is nothing without control.