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General Mach Discussion / Home sequence ignoring switch
« on: June 18, 2013, 04:39:27 AM »
Hi,
I have recently set up a 2 axis CNC plasma cutter with servo driven ball screws receiving signals via a laptop communicating through ethernet to a smooth stepper and breakout board. Communication settings and wiring appear to be correct as I can jog both axes and trigger the limit switch located on the most negative position of the table (LED (M2HOME) on screen lights up yellow when switch triggered). Unfortunately however the homing sequence ignores the limit switch during the ref Y command. If I press this button the y axis moves slowly backwards looking for the switch however does not react when it hits it or is manually triggered. I even tried emulating the button however there is no change. I have checked that the input is enabled for Y axis home and check the direction is correct in the config homing/limits option screen. The peculiar thing is that if I press up twice during the homing sequence it zeros the machine coordinates as if it had just hit the limit switch.
Any help would be much appreciated.
cheers
Coogan
I have recently set up a 2 axis CNC plasma cutter with servo driven ball screws receiving signals via a laptop communicating through ethernet to a smooth stepper and breakout board. Communication settings and wiring appear to be correct as I can jog both axes and trigger the limit switch located on the most negative position of the table (LED (M2HOME) on screen lights up yellow when switch triggered). Unfortunately however the homing sequence ignores the limit switch during the ref Y command. If I press this button the y axis moves slowly backwards looking for the switch however does not react when it hits it or is manually triggered. I even tried emulating the button however there is no change. I have checked that the input is enabled for Y axis home and check the direction is correct in the config homing/limits option screen. The peculiar thing is that if I press up twice during the homing sequence it zeros the machine coordinates as if it had just hit the limit switch.
Any help would be much appreciated.
cheers
Coogan