Dremel CNC remix (by Nikodem Bartnik)

thingiverse

Dremel CNC Remix Based on a remix of Niko Dembartzik's design, I really liked the simplicity of this creation. It seems to be working very nicely for such a simple machine. Modifications were made to the original design: * Larger X, Y, and Z ranges, effective range: 380mm x 380mm x 55mm * Standard profiles 500mm and 600mm were used I didn't like the idea of stepper motors carrying all the axial milling loads, so I redesigned all 3D printed brackets to use KFL08 bearings for the spindles. In combination with anti-backlash nuts, this results in a very rigid setup, and the motors only provide torque for the spindles. New X-axis carriers were incorporated to get the Dremel spindle in line with the linear Y-axis bearings. This should result in less vertical play of the actual Dremel bit. They also raise the Z axis to be more inline with the actual achievable movement of the Z-axis. Due to the way 3D printed parts are constructed, warping could result in misalignment of the linear bearing. For that reason, I machined some 22mm tubes on my mini-lathe to accept the linear bearings. These are now very well aligned and pressed into the 3D printed parts. Everything runs very smoothly. Some other features were incorporated like the usage of a modular Z-axis carrier. Swapping to a laser engraver, dragknife or different spindle setup would be very easy with this setup, based on designs from https://www.thingiverse.com/thing:2750693 and http://www.thingiverse.com/thing:599893. Dustguards were also 3D printed instead of using aluminum profiles. The wastboard is split down the middle parallel to the X-axis to remove it without disassembling the whole CNC machine. Dragchains were added by screwing them directly to the 3D printed parts. The length of the dragchain was chosen not to cut the standard motor cables that came with the stepper motors. A fan is mounted to the Dremel shaft (https://www.thingiverse.com/thing:1872758) to keep the toolpath clear of chips. Very effective! Watch it in action on YouTube: https://www.youtube.com/watch?v=5NyejaiS8iU https://www.youtube.com/watch?v=elpl2aeI1L4&t=51s https://www.youtube.com/watch?v=foyobYvhv94 We use it primarily for our Art and Tech projects: http://www.art-and-tech.com/ https://www.instagram.com/artandtechvof/