Originally Posted by
CitizenOfDreams
1. No, the current settings stay the same no matter what the input voltage is.
2. Correct. If you tell the driver your motor is 3A, it will limit the current to 3A.
3. The TB6600 chip does not have any overvoltage detection/protection, it just blows up if the voltage is grossly exceeded. It does have overheating protection.
4. If the motor is rated at 3A, most people just set their driver to 3A (or the closest lower value), end of story.
You need to figure out why exactly your driver shuts down. If it's overheating (most likely), it needs a heatsink or a better thermal interface between the TB6600 chip and the case.