Yes, You can even make a 3D printed disk and have holes around the edge and press sections of drill-rod into the holes and let the bits of metal rod trigger the sensor. Make say 40 holes around the edge and one hole near the hub for the index sensor.
Skate board bearing are about the right size, let the disk spin on a paitr of these bearings andbe driven by the 17mm hex head on the draw bar. My plan is to make the sensor removable with no tools so the user can access the drawbar. Same idea could work with a DIY magnetic sensor. You could even make the sensor with fine wire. One more idea for a spindle speed sensor: Why not simply use a current sensor of the power lead going to the motor? This would for-sure work on a brushless motor and I bet could be made to work on a brushed motor too. Basically use the motor commutator as a sensor. On Sat, Jun 20, 2020 at 11:02 AM Jon Elson <el...@pico-systems.com> wrote: > On 06/19/2020 11:04 PM, Gene Heskett wrote: > > And they work great, on ferrous gears, but they are all nylon in that > > machine. > > > Well, of course, they don't have to be ACTUAL gears. You > could make a thin steel disc with notches, and it would > still trip the sensor. > > Jon > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
