Servo not moving my pen up or down

  • I do not know why my servo motor is not touching the pen holder. Since they're not touching, it cannot really help the pen holder to move up or down.

  • I can't tell, but from your photo it looks like your whole pen assembly is too close to the drawing surface. I just measured mine, and from the bottom of the white kind of T-shaped piece to the drawing surface is about 36mm.

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