SOLVED sabertooth 2x60 smc3 arduino sps mode 3

Gdays guys

Im wondering how many of you out there have played with the sabertooth 2x60 or 2x32
im using a sabertooth 2x60 with smc3 sps mode 3 script.
everthing was working great then 30 mins into a game it started shaking on one motor.. the motion was still working but it had shaking over the top of the motion.. i closed the sim and the shaking didnt stop i opened simtools and output testing ..still shaking ..i can use output testing to more the motors no problem but one is still shaking.. i closed simtools and closed down the pc .. the rig is still shaking.. i unplugged the power and reconnected it the shaking started again..

the only way it stopped was when i opened the smc3 software..

does anyone have this setup working
cheers guys

Hello,
I have my project with sabertooth but 2x25, i had shaking problem, but it was two cases. Serial cable beatween sabertooth and arduino bad and boud rate too high. instead 500000 i had replaced it to 115200 in SMC3 sketch, but what i know probably with sabertooth 2x60 and 2x32 it'is not a problem.

ive not touched anything in the sketch but the soft start which i have at 1 as i dont need it as my motors are 100watt .. ive changed the output rate to 15 and i thought id fixed it but it returned ive now put the revpwm to 0 and so far so good fpid is at 10 kp 600

how do you change the baud in the sketch ..and which one do you change there is a few diffrent places the baud is writen

//****************************************************************************************************************
// Arduino setup subroutine called at startup/reset
//
//****************************************************************************************************************


void setup()
{
Serial.begin(500000); //115200 ( i have changed this one to 115200 . But this just in my case. Sabertooth 2x25.)
// set the data rate for the SoftwareSerial port
#ifdef SECOND_SERIAL
mySerial.begin(115200);
#endif
#ifdef MODE3
mySerial.begin(38400);
#endif
OutputPort=PORTD;
pinMode(ENApin1, OUTPUT);
pinMode(ENBpin1, OUTPUT);
pinMode(ENApin2, OUTPUT);
pinMode(ENBpin2, OUTPUT);
pinMode(ENApin3, OUTPUT);
pinMode(ENBpin3, OUTPUT);
pinMode(PWMpin1, OUTPUT);
pinMode(PWMpin2, OUTPUT);
pinMode(PWMpin3, OUTPUT);

Just an idea but try changing the FPID to 10 in smc3 util

Just seen in another thread you already had your FPID at 10. I had issues running at 500000 so I reduced to 115200 but the smc3 util wouldn't work it has to be set at 500000. I some how got mine working and it does not jerk about with a 1ms in simtools and an FPID 1 in smc3 util, I have no idea what I did you can see the issues I had on the SMC3 Sabertooth thread.

edit: can you post pics of all your settings simtools/smc3 ?

gday mate yes ill post pics... im finding if the FPID is not above 3 the motor are not in sync say i got sway on output testing ..ill take the slider all the way to the left when i hit the centre button on motor returns then the other its not in time if i have it at 3 it works fine but will do crazy things out of blue like make both motors shoot up to max and stay there shaking to just one motor shaking or going up and down

here are my settings

ive just turned it on with the frid at 2 open output testing and moved the sway slider afew time it started shaking on motor ive now got it at 9 and its fine FOR NOW im running no limits to test it

I have great news i have fixed the issues i was having...
it seems having C Axis3a in simtools axis assignments was the issue
i also found the ard com port set at 9600 not 128000
after 4.5 hour non stop testing on all sims no issues no shakes or crazy behavior

thank you to all the guys that helped try to sort this out with me
silentchill
yobuddy
pit
blazh

i take my hat off to you all
cheers