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General Mach Discussion / Re: Spindle orientation on a Bridgeport...
« on: February 21, 2018, 08:10:18 AM »
I'm pretty sure the Hurco did a slow run of the spindle then killed the spindle (will free wheel for a little bit). After killing the spindle and some set time it would trigger the shot pin. When the spindle coasted into position so that the shot pin and hole lined up it would bring the spindle to a stop at the correct position. After tool was changed, shot pin would retract. Be sure to think about fail safes if you go this route. Shot pin would ideally be gravity return. I would also want to be able to check that the shot pin is at home position before continuing.