Question Simhub stuttering problem

SMC3 does need to be properly configured, please post pictures of all settings.

How did you come to these particular settings?

First change Fpwm to 25 then please please post a picture running the Sine test in OutMode.

While written with another control board in mind here is a gentle introduction as somewhere to hang a basic understanding, which includes links to more accurate but dense information as well: https://www.xsimulator.net/community/faq/a-laymans-analogy-guide-to-pids-pid-tuning.219/

May I suggest starting again and do the recommended SMC3 base setup, and please tell us at what PWMmax value you had movement during the base setup, then post the Sine Test once that is done:

1. Disconnect the motor power supply
2. Make sure Simtools is not running – we’re not ready for that yet!
3. Wire up the Arduino (with SMC3 installed) to your H-Bridges and connect to your computer via USB
4. Run the Windows SMC3 Utility software and make sure it communicates with the Arduino (There is no need to set baud rates, they are not configurable)
5. Set the Kp, Ki, Kd, PWMmin, PWMmax, PWMrev to 0 for ALL motors (This will make sure the motors don’t move)
6. Set Clip to 255 (you need to do this first) and Limit to 255 (This will give you plenty of margin if something goes wrong while setting up)
7. Turn on the power to your motors – nothing should move at this stage!
8. Set Kp to about 400
9. Now slowly, increase PWMmax… at some point the motor should start to move. When it does check the “Green” feedback line is moving toward the “Blue” target position.
   • If it is then that motor and feedback is wired correctly - proceed to test other motors.
   • If it is moving away turn off motor power immediately (or quickly reduce PWMmax again). In this case you need to either reverse the wires to the motor being tested –OR– reverse the +5V and GND wires to your feedback pot for the motor being tested (do not do both). Restart the test from the beginning.
10. Do the above for each motor

Please bump PWMmax up to 100 and run Sine again.

Getting closer, but for now can you please keep things at a baseline, so Fpid to 1 and Deadzone to zero.

Please bump PWMmax up to 150, add PWMrev at 100, then run Sine again.

Try PWMmax at 200, PWMrev at 150 and see what it looks like.

It may be that you have to fiddle with each motor setting independently, if one behaves slightly differently.

See here: https://www.xsimulator.net/communit...driver-and-windows-utilities.4957/#post-48121

Clip Input Used to create a band at either limit of the target range beyond which any values sent to the SMC3 are clipped. In addition to this clipping, if the motor feedback does move beyond this range (typically through inertia), the SMC3 will attempt to brake the motors hard by driving them in reverse until they are back out of this limit zone. The value can be anything from 0-255 (however can’t be less than the current limit setting). Reverse braking is applied in the band between the Clip Input and the Max Limit settings. Reverse braking can be disabled - refer to PWMrev.

Max Limits Used to create a band at either limit of the feedback range beyond which if the motors move (typically through inertia) the SMC3 will automatically shutdown the drivers and keep them disabled until reset. This is essentially a safety mechanism if something goes wrong. The value can be between 0-255 (however can’t be greater than the current clip setting).