MPCNC spring loaded Drag Knife for universal mount

thingiverse

I decided to take on a new challenge by designing my own drag knife with a twist. Despite my best efforts, I couldn't seem to achieve a smooth surface finish when running the blade without causing some kind of issue. In response, I created a spring-loaded design that can move a few millimeters and hopefully compensate for any irregularities in the surface. I haven't printed this latest version yet, but it's coming soon, so proceed with caution. When I initially went to print, I noticed that they didn't sit flat as expected, prompting me to re-adjust the model and hopefully fix the problem. Version 02 was introduced on December 16th as a solution when I encountered too much of a gap between the mount and shell during printing. To address this issue, I made sure each half was cut exactly in half, which might work fine for prints using PLA but also added an additional 2mm to account for some shrinkage in ABS prints. As I continue to refine this design, I'll be sure to update it accordingly. When printing this design, keep in mind that you'll need to obtain the blade strap from the original item I remixed it from. Additionally, you should only print the drag knife rotor with support, as it will be touching the build plate. If positioned correctly on your build plate, the other parts shouldn't require supports to print, but don't quote me on that – I'm not responsible if your print fails. On December 16th, version 04 was added, which includes a new blade holder. A few days later, on December 15th, I introduced a rendition for two nuts and a screw for adjusting the spring tension, with the file name now ending in "-adjust." This design should accommodate one M4 screw and two M4 nuts, but I haven't tested it yet.