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Some older Makelangelos had motors with 400 steps per turn (0.9deg/step). Newer machines have 200 step per turn.

in robot_polargraph.h, look for the lines that define NORMAL_MOTOR_STEPS. the double slash (//) blocks one line, and so the machine thinks it has 400 step motors when it doesn't. Move the // to the other line and upload again.

You may also find your machine moves half the distance it should. then you have a 400 machine and the firmware is set to 200. Do the reverse.

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