Bondtech BMG Upper Mount for Ultibots D300VS

thingiverse

UPDATE: I've upgraded my D300VS with a Hemera mount and I'm thrilled with the results! The improved cooling has enabled me to print overhangs and bridges much faster than before. Check out this thing on Thingiverse! This is a BondTech BMG extruder mount for my Ultibots D300VS+ that sits above the effector plane, giving me more Z printing height and potentially minimizing acceleration wobble of the nozzle. This design should work with SeeMeCNC Max printers or any other delta with 50mm ball-ball spacing using Tricklaser arms. The stock SeeMeCNC arms interfere with this mount, so I recommend upgrading to Tricklaser arms and appropriate carriages for a seamless experience. With my current setup, I have over 500mm of build height on my D300VS+! This design requires a 20mm thick pancake Nema17 stepper, which I got from Steppers Online. A 25mm thick stepper might work, but it may interfere with the Z column arms. My 20mm stepper at 800mA & 24V works perfectly and doesn't skip steps. I've also included provision for a 2mm dia rod to function as a strain relief mast for the wires leading to the effector. Drill that out if necessary! To get things to not interfere, I had to move the nozzle 20mm forwards of the centerpoint. This will slightly reduce the print area. If using Duet3D, add the following to your config.g file: G10 P0 X0 Y-20; for offset BMG extruder Here are all my config changes for this setup: M92 E421; From motor calibration via mhackneys calibration tool. Your's may be different M906 X1000 Y1000 Z1000 E800; Bondtech set motor currents to 800mA for 20mm pancake (mA) G10 P0 X0 Y-20; BMG Upper has nozzle 20mm offset. Compensate for that. M665 L374.810 R204.934 H514.769 B140.0 X-0.073 Y-0.237 Z0.000 M558 P4 X0 Y0 Z0 H50 I1; FSRs with JohnSL board Z probe behaves as a switch and is not used for homing any axes You'll also need to edit homedelta.g to lower the carriages down a bit so the 20mm offset can be accomplished without bumping the endstops. Change the G1 Z-XX line to: G1 Z-15 F2000; down a few mm so that we can centre the head Change "H25" to "H3" AFTER commissioning your printer Run through step 84 of the D300VS build guide. Once M665 values have been found, replace them in config.sys and you may reduce the H50 in the M558 command to H5 (I have it set at H3 for even faster bed probing). Finally, slice this with Slic3r PE using the "Support on Build Plate Only" checkbox selected in the Support Material tab. This prevents infilling the manifolds with support material. Also uncheck Support Bridges.