UM-Clone, Z-Axis with belt-drive

thingiverse

To prevent z-wobble, the Z-axis printer must be belt driven. Z-axes must move very precisely and finely resolved. Minimal errors or fluctuations in layer height are immediately visible in print images. To get maximum possible resolution, a pulley system and 0.9 degree stepper are used. For modification you need: 6 x ball bearings F624ZZ 1 x ball bearing MR105 ZZ Cylinder pin d = 4mm, L = 20mm Stepper Nema 17, 0.9 degree, 2.0A Drive belt GT2, 6mm, 1m Toothed belt GT2, 20T, 5mm bore 2x Screws M3x25mm Firmware Marlin 1.1.9 Configuration_H define DEFAULT_AXIS_STEPS_PER_UNIT { X, X, 320,X } define DEFAULT_MAX_FEEDRATE { X, X, 50, X} define UNKNOWN_Z_NO_RAISE // Don't raise Z (lower the bed) if Z is "unknown." For beds that fall when Z is powered off. define HOMING_FEEDRATE_Z (8*60) To stay in real printing application in full-step grid, it is still useful to choose possible layer heights that are divisible by 0.05 mm. Note: You probably have to insert something in the GCode. When you finished the print, stepper unlocks and then Heating-Bed normally falls down. Then, you have to insert in Endscript G1 ZXX (xx is Zmax).