Magnetic Z-axis Endstop for Makerbot

thingiverse

This modification enables Z-axis endstop recalibration before each print, requiring no connection between the print head and platform. The Makerbot-inspired circuit uses a reed switch connected to the red signal line and black ground lines in the original circuit, with an LED and resistor for high signal when open. Exercise caution while wiring up during bot power down to prevent shorting. Sonicare toothbrush magnets and a cut blanking plate are used for the reed switch holder, allowing fine-tuning of the Z-max position. The provided calibration code from ScribbleJ is similar, but disregard the reverse homing direction warning during Gcode checks. This modification works well on Dualstrusion Thing-o-matic with Titanium belt APB and uses Avery Clear labels for optimal results. Updated profiles are available for RepligatorG 0040 Sailfish.