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General Mach Discussion / pockets out of size, need help
« on: April 16, 2011, 01:09:48 AM »
after review all parameters on my machine: (motor tuning, displacement precision in X and Y axes and execute the axis calibration), and review the G code generated from my Cad-Cam program (BobCad V24), I have this problem: all pockets are undersize in diameter (not in depht), the Gcode created starts with following instructions:
line N1 G21 G40 G49 G54 G80 G90 G91.1 G53 Z0...
the line which indicate the start position for the controlled point as sample: (for a pocket with 15mm diameter 12.7mm depth, with center coordinates X=25mm, Y=100mm, tool diameter 4.7625mm (3/16"), as I calculate the point x=30.118 and y=100. has to generate a exact 15mm diameter hole:
N11 X30.118 Y100.
N12 G01 Z-12.7 F2540.
N13 G03 X30.118 Y100. I-5.118 J0. F2135.
(the machined pocket has 14.2mm diameter.)
what can I do or change in the configuration in Mach???
thanks in advance. Eduardo
line N1 G21 G40 G49 G54 G80 G90 G91.1 G53 Z0...
the line which indicate the start position for the controlled point as sample: (for a pocket with 15mm diameter 12.7mm depth, with center coordinates X=25mm, Y=100mm, tool diameter 4.7625mm (3/16"), as I calculate the point x=30.118 and y=100. has to generate a exact 15mm diameter hole:
N11 X30.118 Y100.
N12 G01 Z-12.7 F2540.
N13 G03 X30.118 Y100. I-5.118 J0. F2135.
(the machined pocket has 14.2mm diameter.)
what can I do or change in the configuration in Mach???
thanks in advance. Eduardo