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The galvanometer motor is self-locking, but not strong enough
Aug 03, 2018

Use a well-confirmed galvanometer driver board and a good galvanometer motor to be energized normally on the driver board and galvanometer motor to be tested, and gently rotate the galvanometer axis by hand. If it becomes "hard", it is normal; otherwise It can be determined that the galvanometer drive plate and the galvanometer motor are damaged.