To test the solenoid alone you could use : testSolenoid.ino available in (int PIN_SOLENOID = 2; in the file)https://github.com/iapafoto/BraillePrinter/tree/ma...
Hi! I had the same problem at the very beginning, the screws at the back of the solenoid brake the movement. Solution: add washers so that the screw does not block the solenoid!
I will watch. Problem, I do not have any machine to test right now!
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