New User Project

Here is the way i have wired it up

@Bruce he is using the MM for one motor that's why he is testing it like that.

Ok cool thank you for clearing that up, i am thinking my MM are just cheap crap ones

Looks correct to me. If you are turning the pot by hand the motor will turn in one direction when the green line is above the blue line and the other way when the green line is below the blue line on SMC chart.

Yes Rufus, everything is fine until i connect the motors then it is very jumpy, and notchy.

all my monsters are cheap Chinese clones/copies. There are some bad ones out there though. Check out @SilentChill 6dof for monster testing info. Did you adjust the pid settings this can create a lot of problems.

http://www.ebay.com/itm/191674295987?_trksid=p2057872.m2749.l2649&ssPageName=STRK:MEBIDX:IT
I have had very good luck with this seller. They may ship to your part of the world?

They are down to less than 6usd.

Got the motor today (Excellent shipping service MD!), but not the MM's. I just need to rig up a feedback pot and all should be good to go. Damn that motor is beast! It's a shame I can't squeeze them into my rig or else it really would become an ejection seat.

I've looked at SMC3 and it is directly compatible to my existing setup so I should be able to get stuck into testing over the weekend.

Cool looking forward to your results, i also have ordered a mm form the same company you did. should be here next week as well.

let me know what pot you use to test with

No problems at all starting up SMC3. Excellent software Rufus!

@Bruce
After a bit of testing I think I've got some values for you that you may be able to work with. I've used a different controller board but the values should be close. The tuning is not perfect but okay for this purpose. I am using an Elechouse 50A motor controller board. I will connect the MM when I get it and compare results. The pots I am using are Bourns cermet 10K steel shaft pots from Element14. http://au.rs-online.com/web/p/potentiometers/7377650/





I hope this gets you up and running. If not and you are still having problems then we will have to wait for the MM boards to test. (I will be throwing them on this test rig to verify the quality of them anyway!)

P.S. I've just discovered that PWM Min Max values are binary = 255, not percent. So you could up the PWMmax a fair bit to give the motor a heap more power.
P.P.S. I've just read that the VNH3SP30-E only takes up to 10KHz PWM frequency, So you may need to drop the Fpwm back to 10KHz or less for better power performance.

Monsters run on the vnh2sp30, not the 3sp30. Also I see 30khz for the frequency, as I understand 25 is the max for arduino uno. How did you come up with this number? Why is your pwm reverse number so much higher than your pwm max?

Hello,

nice project!Sorry, I have been away from keyboard for 3 weeks... and notice only now your tag

you have to investigate from where your oscillations are coming from (because the code itself works fine for many people )
be systematic, rigorous and methodic!

it could be as weird as faulty Motomonster (swap left and right), motor itself (swap left and right), Power Supply too weak, unshielded wires, faulty potentiometers
is it happening without being connected to Simtools?

You are experimenting same behaviour with SCM3? in this case, it's hardware problem...

RacingMat, The problem i am having is not from your code, i am trying to isolate the problem and i have think i have found the issue with low quality Moto Monster boards. I have ordered a new one from a better supplier and will test that. I will keep you guys updated with the outcome.
Also would like to add thank you to everyone who has replied to this post to help me find my issue. THANK YOU.

I was able to do some tests with the MM boards I recieved. They test okay. More noisier than the elechouse boards. Gains very different though. This was a ball park setup. I hope the board you recieved fixed the problem.

Kp 90 and pwmmax 95 fpwm10khz, are you just throwing random numbers into your setup. Please explain how you came up with these? Do these work well with your motor under load? Kp 90 just seems very low that's lower than what I've seen guys run wipers at. How does the frequency at 10 help? I moved mine around from 15 to 20 to 25 it didn't seem to make much of a difference tho.