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I'm not having good luck with my eggbot. The weight of the pen shaft axis is causing stuttering in the motor. The pen arm jiggles. It is particularly exaggerated when both motors are moving which caused me to support voltage or current. With no pen shaft that motor moves smoothly. it doesn't seem like much weigh. i've tried switching pololus, adjusting current, switching motors, even arduino/ramps, and this characteristic isn't changing. I'm using Zaggo's original code with zoom @ .02. The gcode produced produces ranges for the "eggbot coords" using unicorn/inkscape on a mac of -450-
&
gt;+450 in rotation (x) and -140-
&
gt;+140 in (y) pen arm.

ideas?