> From: dave engvall [mailto:dengv...@charter.net] > On 11/21/21 9:24 PM, John Dammeyer wrote: > > Is there a way to tell the spindle to turn until it finds the index and > > stop so it's always stopping at the exact same spot? Like > decelerate to 0.5 rev per second (30 RPM) or slower and stop when the index > happens? With either an M5 or the button on the > user interface? > > > If I were� doing that� today I would use 3 sensors. IOW a guard sensor > either side of index, rotate quickly to detection of guard slow way down > and search for the central sensor. How you know which is the shortest > path is left as an exercise for the "student". ;-) Or maybe one simply > defaults to searching in one direction. > > If you don't need orientation then a stepper motor and a gear would seem > to be as simplistic as one can get. > > Dave
One still has to line up the socket to the hex head of the drawbar. And since it can be at any position relative to the spindle the sensing has to happen against the hex head. Rotate spindle until hex head is at a known position. Then rotate socket from and indexed position until it matches the socket and then send it down. This could all happen in under 100mS and be almost transparent to an end user. There are times where I wish I had BMT-30 cone type tooling or just only TTS. John _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
