MY first 2dof DIY

Hi all. I'm building my 2DOF project, and it "worked fine" in some tests, like this(on the right side you can see both axis):


However, I am finding it very difficult to regulate the potentiometers. MY system stops working several times after few seconds playing the game (dirt and rfactor)

Is the behavior of the video below normal? (When I move a pot, sometimes the other motor also moves):

Hi!

There should not be any relations between those movements from pots. So there is something wrong... Hard to tell from your video where wires are connected.

Does both pots have +5V and GND-wires going to side pins?

Then wire from middle pin should then go straight to A0 and the other to A1 of Arduino board...

hi Fellgood. thanks for you reply.

yes. i think that all connections is ok. look:

Hi mate, thinking or knowing could be quite different There must be some creeping current between the pots.
https://www.arduino.cc/en/tutorial/potentiometer

Good Pit!
I will test today and give news. thank u!

One more notice... which code do you use in Arduino? At least SMC3 is not pin compatible in the way you have mounted MM over it...

Hey fellgood. i used this code...
sorry, i didn't know about SMC3. Is there anything I can do to solve this? some adjustment?

Code:

/* 
Arduino code for dynamic playseat 2DOF
Created 24 May 2011 by Jim Lindblom   SparkFun Electronics https://www.sparkfun.com/products/10182 "Example Code"
Created 24 Apr 2012 by Jean David SEDRUE Version betatest26 - 24042012 http://www.gamoover.net/Forums/index.php?topic=25907
Updated 20 May 2013 by RacingMat in english http://www.xsimulator.net/2dof-wiper-motor-playseat/ in french : http://www.gamoover.net/Forums/index.php?topic=27617
Updated 30 April 2014 by RacingMat (bug for value below 16 corrected)
*/

I deleted the code not to mislead someone to use a code without any installation manuals etc. You're using the RacingMat Code https://www.xsimulator.net/2dof-motion-simulator-truck-wiper-motor-playseat/4/

AFAIK the MM and Ard are working "piggy-back" if you use the RacingMat Code. NTL I suggest to try the SMC3 sketch/code, much more versatile and SMC includes a nice tool for changing parameters on the fly (SMC3 utility)

Sorry @Lucio, can't help you much more, but a thing just came in my mind, that different drive directions could be mixed between motors (been there and done that)... But there is lot more knowledgeable guys here. Hope you get that solved

Do you recommend me to use another code?

For MM, IBT-2 https://www.xsimulator.net/communit...3dof-motor-driver-and-windows-utilities.4957/

Sabertooth https://www.xsimulator.net/communit...ket-serial-pid-motor-driver-w-softstart.9277/

Have you got some good heatsinks on the motor controllers? If not - they will start overheating and become sluggish - and eventually die.

Pit. Using the SMC3 Monitor Utility, i I had the impression that I'm having a voltage return (or creeping current - Correct me if I'm wrong).

Look:

Either way there is something wrong with your pots, the max position should be close to the max limits line and not close to the target line. i suggest checking the pots one at a time. probably there is a short of the pot case to one of the wires. But this is an assumption only.

I notice in your photo of wiring you have POTs connected to A0 and A1 of Arduino?

When the moto monster board is piggybacked like you have done I believe these pins are used for other functions... see schematic: https://cdn.sparkfun.com/datasheets/Dev/Arduino/Shields/MonsterMoto-Shield-v12.pdf This is likely to be causing problems.

If the code you tested is meant for piggyback use then you are probably using wrong pins - check their instructions.

Now you are testing with SMC3 you will need to unplug it as a piggyback board and wire as detailed in SMC3 thread.

Fixed !!! The problem was a bad contact on the 5V pin of the Arduino. I discovered using a multimeter directly on the potentiometers, and saw that it was only coming 3V. Now is ok !!!