Newbie 2DOF with Arduino & MM

Hi All,

Time to share what I have so far.
A 2DOF built following @RacingMat

So Far:
Arduino UNO R3
Monster Moto Shield
12v 50A PSU
200w 12v Worm Drives
10K Pots

I had it all working well but have just run into a problem.
My right motor is smooth in one direction but seems to use heaps of power trying to go the other way (see video)

Also, when I sit in the seat to motors will go past the Pots end point and get stuck.

Any help and input would be GREATLY appreciated.

Well done!

In theory, it's normal behaviour that:
when the motor is pushing up (fighting against weight), it's slower
when it goes down, it goes smoothly and quickly.

But normally, we try to avoid such differences and get same speed in both ways.
In your case, I would say that your lever is too long, or your seat is too heavy, or your motor is too weak, or your tension is too low...

I you go farther than your pot limits, it could be explained by some above factors
but that should be managed by increasing the software security limits!

yours
Mat

How long is that lever?

it seems the issue is only on the right motor?
Please switch the motor connections of the MM: (A1-B1) to (A2-B2). If the behavior is MM related the issue should remain on the same output.

The levers have a CTC of 65mm. Is this too much?

As per @Pit said, I swap the motor connections and now's it's the left motor. So possibly a faulty MM.

I'm still learning the software side of it and trying to get the the seat to move something that looks like what has doing in the game.

Also still have the problem when someone sits in the seat the motors go past the pot Max and the motors get stuck. Mainly when it leans to a corner.

Then you should raise the min. power which would hold the weight.

I suggest to check your wiring before you buy a new MM. And check out our FAQ where to buy MMs...there is no guarantee but a good chance to get some working units.

Would you be so kind to explain which setting this one is?

Obviously you are using @RacingMat code so he can advise you. After a first view on the code I could not find any options.

well, a few of the ard boys have suggested a few things. otherwise a 40 mm ctc lever if it still struggles.

Thanks all, I'll try these suggestions over the next few days.

Ok, so 2 MM's later I started to get frustrated.
I have used Arduino on other projects (not sim related) and its great.
The MM's are just too unpredictable/unreliable so I decided to try JRK's. After reading many posts and how much @bsft recommends them I ordered a couple.

Well, after following @eaorobbie setup guide, I was up and running in minutes. Thanks eaorobbie!
I have good motion and I'm learning (slowly) how to use the tuning centre.

The only problem I have now is for some reason when the feedback reaches 0 the motor wont auto come back. It sort of looses power and just sits there. This happens when a person sits on the seat and lean into a corner too much.
I have checked in the JRK software and its set "Max duty cycle while feedback is out of range - 600(100%)" but its not working.

Any suggestions?

Some pics of the setup so far.

It was my rig balance that was the problem. I moved the centre pivot point 80mm forward and now it's perfect!

I still have a lot of work to do with the settings and tuning but the rig is in full motion now.

I have been playing with the tuning centre and are starting to get some great movement.

Video of first test with Assetto Corsa

Wondering if someone could help with a setting. When I go around a corner and the car leans, when straightening up the seat seems to sway left, right left while trying to straighten.

Any idea which setting would stop this?

Thanks noorbeast,

I cant get any video at the moment but its when your coming out of a corner onto a straight.

@lustigio I suggest you to clear out from the very first beginning the direction of the forces independent from all other forces.