>2015-11-17 21:54 GMT+02:00 John Kasunich <jmkasun...@fastmail.fm>: >> Just divide the steps per mm for X in half, and send the X steps to >>both >> gantry and pipe chuck motors using HAL. Also send X direction to >>both >> motors, and invert one so they travel in opposite directions. Use >>HAL >> logic (in the base thread) to turn off steps to each motor when that >>motor >> hits its home switch (only while homing), and to send a composite >>home >> switch signal to LinuxCNC when both motors have hit their home >>switches. > >Why not to treat the chuck motor as another joint of X axis? There >already are 2 of them (on the gantry), so adding 3rd should be >straightforward - that allows homing the chuck to its own switch >without any additional hassle in HAL or whatever. > I probably dont have an idea of how that works. I am not good with joints mode.
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