I’ve been working on an integrated spindle/ tool mount build for my mpcnc, and I have to admit, it’s been more difficult than I thought.
The idea was simple enough. Print a tool mount that housed a set of 608 bearings as close to the center of the tool mount as possible. Fit an er11 c8 100l collet through it and use a spacer and a gt2 pulley to both secure and preload it.
Turns out, it only works with a specific motor, specific gearing, and specific belts per build. That’s way too much plastic and changing out of parts if one wanted to try different configurations.
I think I found a solution. I’ve broken up the part into a few peices. I’m test printing v1 of an integrated bearing/spindle/toolholder tonight, and the idea is to print the motor holders independent and mount them to the tool mount.
This way, basically, you have a spindle mounted as close to center of the z as possible, and can have a few different motor mounts if needed for different gear ratios or motor sizes.
For the issues encountered.
The bottom emt mount screws in the tool mount get partially blocked by the bearing holders. May not get as much torque tightening them. Is this an issue?
Tensioning seems to be dependent on my motor mount at the moment. What ever tension needed is currently designed into thetcenter distances of the pulleys and belt. he Any familiar with gt2 or 3 belt mention systems? Is there an easy way?