There are a number of videos out there changing up the G0704 gear driven spindle to belt drive. Some use toothed belts, others a double set of pulleys. Most of the videos explain that they will soon but the slotted RPM sensor disk back on but for most of them they've not done that yet.
For LinuxCNC what sort of encoder resolution is required on the spindle to be able to do tapping. I know I can do it with one pulse per rev with my Electronic Lead Screw to cut nice threads but I also don't slow down the spindle at the end of a tap into a blind hole while tracking spindle speed. My new 1.8kW AC Servo motor with a 2500 pulse per rev encoder can echo the encoder pulses out of the drive so if I used a 1:1 toothed belt I could use that. But if I want stepped pulleys to give me extra torque at low speeds then I'm looking at V belts so I'll need an encoder on the spindle. The spindle pulley on my G3616 type mill has a tapered cone. That also suggests I want to stay with V belts and just mount a slotted disk onto it rather than try to make a similar cone that holds toothed GT3 belts. There's room. But how many slots? Thanks John Dammeyer _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
