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wsh32 / airhockey

PIE Final - Air Hockey Playing Robot
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Stepper motors overheat #43

Open wsh32 opened 3 years ago

wsh32 commented 3 years ago

When running the stepper motor continuously over an extended amount of time (30 min +) it overheats.

Will investigate

wsh32 commented 3 years ago

Seems like we have to calibrate the drivers' built in current limiting. Here is a video of how its done. We should do this for every stepper driver we get.

https://www.youtube.com/watch?v=89BHS9hfSUk

For the pololu A4988 carriers, the V_ref is found using the following equation:

8 I_max R_cs

R_cs for the A4988 carriers is 0.068 ohms

The motors we are currently using (subject to change) is rated for 0.33A. This gives us a V_ref of 0.179.

With a factor of safety, we'll set V_ref to 0.16.

wsh32 commented 3 years ago

did not fix it, still have heating issues when runnign over long amounts of time.

will need to write a automatic shutdown