Question 2DOF One Motor Shutting Off

When my rig is sitting idle with no plugin activated, the motor on the left will randomly collapse even if I am not sitting in the chair. This also occurs probably 50% of the time right when I activate or deactivate a plugin.

At first I thought it might be the motor having an issue, so I bought a new one and it is still having the same outcome. I swapped the motor drivers, sensors, arduino, re-wired the whole system, etc but it always follows the left side even if i switch the location of each motor. This means it is not a physical issue.

I noticed when i tested some more that this issue never happens when SMC3 is open and the rig is sitting idle. It only happens if Simtools is open. I reinstalled Simtools but the issue persists.

Is there something like a setting I might have gotten wrong or something within the software that could cause this issue? Or might it be another factor other than Simtools. Sorry if this is the wrong thread to post my question.

Thanks for reading.

Thanks for the reply. I put all the images you asked for, however im not sure its the design that causes the issue. It works fine if a plugin activates correctly, and can support more than enough weight for me to use it. The left motor usually collapses after it just sits idle with no plugin activated for a few minutes even when I am not sitting in the chair.

Hardware: 250w 24v motors, arduino uno, BTS7960 motor drivers, hall angle sensors, car u joint, 500w power supply for each motor, 1.75 inch CTC distance.

Also want to mention that I am going to tear it down soon and rebuild the whole thing stronger with a better design and with a shorter CTC distance.

Let me know if there is any information I forgot. Thank you for helping.

Thanks for responding again.

The motors are 75rpm. The frame does have a lot of mass, which is part of why I am doing the redesign and decreasing CTC distance, so hopefully it will help. Even so, it is pretty strong now. I can put all my weight on one side of the rig and it doesnt collapse.

To answer your question, the motors move a little bit when i apply force on the pedals, however the travel is so small I can barely notice. And yes, it was balanced, but the monitor and wheel and other accessories ended up weighing a little more than I thought so the weight is just slightly more towards the front.

I will try to include your suggestions in the redesign and will let you know if it still has issues. I didnt know that such a little amount of movement goes a long way if it is sharp and fast, so my first design supported movement up to something like 20 degrees, which is why the levers are long and the whole thing is so tall and weak.

I wont respond to this thread unless I have another issue. It could be something like a month before I reply.

Thank you for your time and help!

No there is not.

I have accidentally pulled the USB cord in the past and it beeped but it made both motors fall not just the left one. Both motors are connected to the same Arduino.

Good to know, hopefully my new design will fix it. The new CTC distance will be ~50% smaller and the platform should also weight around 20kg less. I can also balance the COM better.

Thanks for your insight.