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General Mach Discussion / Re: Mach3 Z Axis Travel Not Complete for Next Instruction.
« on: July 16, 2016, 02:07:08 AM »
Just some rambling’s…
I don’t think there is any defined method for establishing Velocity and Acceleration other than by ‘trial and error’ where they are each individually increased until the point of stall then reduced by 30 %.
If your machine is going to be used for substantially different tasks (eg. Wood routing / pcb engraving / etc.) then it makes sense to create and use different profiles with each, individually set to optimum performance (Velocity / Acceleration / etc.) for the intended task.
I am not aware of any means of setting Exact Stop mode just for the Z axis movements. You could, of course, use G61 / G64 before and after each Z axis line of Gcode but that would also slow down overall program execution speed. You could also perhaps consider modifying your post processor to add a G4 dwell (P #) following each negative Z movement, the delay being great enough to allow complete axis travel.
Another option and one that I would do, is to reduce the clearance Z height above the pcb. Assuming everything is flat then 1mm clearance would be more than adequate.
Tweakie.
I don’t think there is any defined method for establishing Velocity and Acceleration other than by ‘trial and error’ where they are each individually increased until the point of stall then reduced by 30 %.
If your machine is going to be used for substantially different tasks (eg. Wood routing / pcb engraving / etc.) then it makes sense to create and use different profiles with each, individually set to optimum performance (Velocity / Acceleration / etc.) for the intended task.
I am not aware of any means of setting Exact Stop mode just for the Z axis movements. You could, of course, use G61 / G64 before and after each Z axis line of Gcode but that would also slow down overall program execution speed. You could also perhaps consider modifying your post processor to add a G4 dwell (P #) following each negative Z movement, the delay being great enough to allow complete axis travel.
Another option and one that I would do, is to reduce the clearance Z height above the pcb. Assuming everything is flat then 1mm clearance would be more than adequate.
Tweakie.
