Gigantic Bastard CNC

thingiverse

Why 'Gigantic Bastard'? It's really big, and it's the illegitimate offspring of the two most prominent printed CNC projects: the MPCNC and the Root 2 CNC. I created this mostly because I already had an oversized MPCNC and needed more rigidity. This thing is built like a tank, and is approximately a $50 upgrade if you already have a 25.4mm MPCNC. Update 08/06/2017 This project is no longer being updated. If you are just starting a build, I recommend my latest full 4x8' plywood sheet CNC instead. Update 4/3/2017 I have added 23.5mm and 25mm versions of the files. I have not tested these, but they should be correct. Use at your own risk. A bit of info on the pieces: spacer.stl This is a rounded spacer used in place of washers to allow 5/16 bolts to be used in place of the M8 ones in the Root 2.1 carriage. standoff_v2.stl This is used to support the round tubes. You will need to drill a hole and use an M4 tap, then screw in an M4 screw about every 8-12 inches. This is the most important part of this mod -- if you don't user screws in the support, the CNC will flop around. jig.stl This is a jig to help you drill the holes for the standoffs. It works best if you tighten down the tubes, drill a hole, then slide to the next position and repeat. Remember that all the holes need to line up perfectly. If you mess up, just move over a bit and try again. sideMount.stl This piece mounts to the MPCNC rollers and to the gantry side pieces. The 3 holes fit 1/4" bolts. zaxis.stl This is a modified MPCNC Z axis that mounts to the Root 2.1 carriage. tubemount.stl and tubemount_mirror.stl These are the mounts for the round tubes and the belts. side.dxf This is the wooden panel that joins the MPCNC sliders to the Root 2.1 short axis. Print Settings Printer: SpiffBot Rafts: Doesn't Matter Supports: Doesn't Matter Resolution: 0.3mm Infill: 50% Notes: Print with 4 shell layers, 4 top layers, and 4 bottom layers. I printed mine in PETG.