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General Mach Discussion / Re: Newbie here: need adivce on postprocessors compatible with mach3
« on: December 05, 2014, 01:57:14 AM »
Hi Arctic Monkey,
Most CAM software allows the Gcode for curves to be created from either arc's or arctangent's (G2/G3 or G1) where it is just a case of selecting the appropriate post processor within the CAD software before generating the Gcode.
The Tangential problem has been with Mach3 for many years now and it is unlikely to ever be resolved now that Mach4 is coming on stream. By creating a CAD/CAM 'lead-in' for any G2/G3 circles the blade direction is set during this lead-in whilst the blade is clear of the work and by making the lead-in have the same radius as the circle being cut the work is not spoiled as a result of unwanted cuts. It's difficult to describe this but once you have it working you will understand.
Tweakie.
Most CAM software allows the Gcode for curves to be created from either arc's or arctangent's (G2/G3 or G1) where it is just a case of selecting the appropriate post processor within the CAD software before generating the Gcode.
The Tangential problem has been with Mach3 for many years now and it is unlikely to ever be resolved now that Mach4 is coming on stream. By creating a CAD/CAM 'lead-in' for any G2/G3 circles the blade direction is set during this lead-in whilst the blade is clear of the work and by making the lead-in have the same radius as the circle being cut the work is not spoiled as a result of unwanted cuts. It's difficult to describe this but once you have it working you will understand.
Tweakie.