When I first installed the arm, everything worked for maybe about 30 minutes. Now, when I power it up, the arm doesn't move at all on power up. If I choose to move the arm to hotend 2, it works just fine, but if I try to move back to 1, it doesn't move. And now it is dead. So I got a servo from RC car fortunately, fixed the angle problem to changed the configuration.h, it works fine but opposite way. When I choose 1, it turned left. Is there configuration reverse code can change the servo direction?