I had some problems today with a small XL timing pulley slipping on a NEMA17 stepper shaft due to the set screw loosening after running for long periods (multiple days). I drilled and tapped a second set screw hole, and I can probably apply some thread locker, but I got to wondering if it would be possible to make a miniature taper lock type bushing and pulley to clamp onto a stepper shaft. Anybody ever seen anything like that?
The original taper lock system has a split bushing with an 8 degree taper against the pulley. They also have a clever set screw arrangement to tighten the pieces together and to jack them apart when removing. If you haven't used them before, a video is the best way to understand them: https://www.youtube.com/watch?v=-3K_vf_7fhM I like to 3d print my timing pulley perimeters, but a metal hub is nice (as has been discussed on here in the past). I'm pondering how I could make hybrid pulleys with a taper locking hub. Threading the holes in the plastic pulley wouldn't work so well. Perhaps some threaded metal insert can be incorporated from the back side. Enough of my musings. Looking forward to hearing other ideas and suggestions. -- Ralph _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
