Kossel Mini, Airtripper's with mk8 drive gear, 1.75mm PLA, E3D v6 @ 205C.
I use a lot of retract, because of my Bowden tube, and my drive gear set screw keeps backing out. I filed a flat on the stepper shaft, added blue Loctite, and used a brand-new grub screw. I tightened the screw until it almost stripped. It still backed out after just a few prints.
Any ideas? I could use red Loctite or just epoxy the drive gear on, but I'd like it to be removable. There's not enough space to use a non-grub m3. What else would you suggest?