Question Problem with SMC3 Arduino

Can you please detail the control boards being used, what motors, confirm the com port is correctly set, and please post pictures of all of your SMC3 settings.

Has the SMC3 code been edited to MODE 2 for the IBT2s: https://www.xsimulator.net/community/threads/problems-with-my-simulator.15382/#post-207320

Can you please confirm the Com Port is correct, you can do so in Device Manager.


This is the official wiring guide for IBT2s:




Have you checked the functioning of the IBT2s with a multi-meter?

I am not sure how you got the settings you have with no feedback, these are the SMC3 setup steps: https://www.xsimulator.net/communit...3dof-motor-driver-and-windows-utilities.4957/

I strongly recommend you follow the steps below if this is the first time you are using SMC3 with your simulator to reduce the risk of damaging anything.

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

While the control board in this example is different the testing process is still relevant: https://www.xsimulator.net/community/faq/monster-moto-testing-before-use.158/

The Hall sensor should be marked for wiring.

As mentioned earlier, this is the wiring from the SMC3 thread for IBT2s, though some members have also reported quality issues with the IBT2s: