[CNCwilson]

hey.. waiting for my machine to get fixed buy i noticed something odd happening when i import g-code into the Mach3 on this machine... everything is almost double scale... not the normal 10x scale from mm to inches, but its like a prop scale of 2x..

If i take the same mach3 gcode file and load it into another machine here, the scale is perfect, so the problem seems to be just the way this machine is configured ( from the factory )

any ideas?

[g29cc]

I am far from a Mach3 expert. But did you download the manual for Mach3 ? It is a bible for those of us that aren't super fluent with it.

Also you can PM GER21 on here, he is very fluent with Mach3.

[ihavenofish]

hey.. waiting for my machine to get fixed buy i noticed something odd happening when i import g-code into the Mach3 on this machine... everything is almost double scale... not the normal 10x scale from mm to inches, but its like a prop scale of 2x..

If i take the same mach3 gcode file and load it into another machine here, the scale is perfect, so the problem seems to be just the way this machine is configured ( from the factory )

any ideas?

mm to inches is a factor of 25.4

have you measured the movement exactly? like make mach move 1 unit, and measure exactly the movement in real life.

it could be the steps are set wrong, or just a simple unit conversion, or maybe mach's scaling is on, though you would see that in the mach screen next to the axis positions.

[John Lock]

I'm having the same problem. It's not mm/inch issue. Motor tuning is set up correctly. I have a varience of .017 inches when running the following drill file below. Thanks for any input.

This file generated 2/19/2011 12:31:46 PM)
( Tool| Size | Min Sub | Max Sub | Count )
( T01 | 0.700mm 0.0276in | 0.0000in | 0.0000in | 0 )
( T02 | 0.813mm 0.0320in | 0.0000in | 0.0000in | 0 )
( T03 | 1.016mm 0.0400in | 0.0000in | 0.0000in | 0 )
( T04 | 1.118mm 0.0440in | 0.0000in | 0.0000in | 0 )
( T05 | 1.300mm 0.0512in | 0.0000in | 0.0000in | 0 )
( T06 | 1.900mm 0.0748in | 0.0000in | 0.0000in | 0 )
( T07 | 2.800mm 0.1102in | 0.0000in | 0.0000in | 0 )
( T08 | 3.200mm 0.1260in | 0.0000in | 0.0000in | 0 )
G20
(Absolute Coordinates)
G90
M05
G00 Z0.0000
G00 X0.0000 Y0.0000
M06 T01 ; 0.0276
G00 Z0.3000
M03
G04 P3.000000
G82 X-8.1100 Y6.0500 Z-0.0700 F10 R0.3000 P1.000000
G82 X-8.1100 Y6.2500
G82 X-8.1111 Y6.1500
G82 X-8.5900 Y6.0500
G82 X-8.5900 Y6.1500
G82 X-8.5900 Y6.2500
G82 X-8.7600 Y5.6500
G82 X-8.7600 Y5.8500
G82 X-8.7611 Y5.7500
G82 X-9.2400 Y5.6500
G82 X-9.2400 Y5.7500
G82 X-9.2400 Y5.8500
M05
G00 Z0.0000
M06 T02 ; 0.0320
G00 Z0.3000
M03
G04 P3.000000
G82 X-0.2500 Y6.5000 Z-0.0700 F10 R0.3000 P1.000000
G82 X-0.2500 Y6.8000
G82 X-0.3500 Y5.6500
G82 X-0.3500 Y6.0500
G82 X-0.3500 Y6.5000
G82 X-0.3500 Y6.8000
G82 X-0.4500 Y6.5000
G82 X-0.4500 Y6.8000
G82 X-4.8500 Y1.7500
G82 X-4.8500 Y1.8500
G82 X-5.1000 Y1.6500
G82 X-5.1000 Y1.9500
G82 X-5.2000 Y1.6500
G82 X-5.2000 Y1.9500
G82 X-5.3000 Y1.6500
G82 X-5.3000 Y1.9500
G82 X-5.4000 Y1.6500
G82 X-5.4000 Y1.9500
G82 X-0.5500 Y6.5000
G82 X-0.5500 Y6.8000
G82 X-5.6500 Y2.0500
G82 X-5.6500 Y2.2500
G82 X-5.6500 Y2.4500
G82 X-5.6500 Y2.8500
G82 X-7.4500 Y5.8000
G82 X-7.4500 Y6.1000
G82 X-7.5500 Y5.8000
G82 X-7.5500 Y6.1000
G82 X-7.5500 Y6.6000
G82 X-7.5500 Y6.8000
G82 X-7.6500 Y5.8000
G82 X-7.6500 Y6.1000
G82 X-7.7500 Y5.8000
G82 X-7.7500 Y6.1000
G82 X-8.7500 Y1.4500
G82 X-9.1500 Y1.4500
G82 X-9.2000 Y7.2000
G82 X-0.9500 Y6.8000
G82 X-0.9500 Y7.1000
G82 X-9.6000 Y7.2000
G82 X-9.8500 Y7.2000
G82 X-9.8500 Y0.9500
G82 X-10.2500 Y7.2000
G82 X-10.2500 Y0.9500
G82 X-10.4000 Y0.5500
G82 X-10.6000 Y7.2000
G82 X-10.8000 Y0.5500
G82 X-11.0000 Y7.2000
G82 X-1.1500 Y6.8000
G82 X-1.3500 Y7.1000
G82 X-1.9000 Y7.1000
G82 X-2.3000 Y7.1000
G82 X-2.8500 Y5.3500
G82 X-2.8500 Y5.6500
G82 X-2.9500 Y5.3500
G82 X-2.9500 Y5.6500
G82 X-2.9500 Y6.9500
G82 X-2.9500 Y7.2500
G82 X-3.0500 Y5.3500
G82 X-3.0500 Y5.6500
G82 X-3.0500 Y6.9500
G82 X-3.0500 Y7.2500
G82 X-3.1500 Y5.3500
G82 X-3.1500 Y5.6500
G82 X-3.1500 Y6.9500
G82 X-3.1500 Y7.2500
G82 X-3.2500 Y5.3500
G82 X-3.2500 Y5.6500
G82 X-3.2500 Y6.9500
G82 X-3.2500 Y7.2500
G82 X-3.3500 Y5.3500
G82 X-3.3500 Y5.6500
G82 X-3.4500 Y5.3500
G82 X-3.4500 Y5.6500
G82 X-3.5000 Y5.9500
G82 X-3.5000 Y6.1500
G82 X-3.5500 Y5.3500
G82 X-3.5500 Y5.6500
M05
G00 Z0.0000
M06 T03 ; 0.0400
G00 Z0.3000
M03
G04 P3.000000
G82 X-5.9500 Y1.8500 Z-0.0700 F10 R0.3000 P1.000000
G82 X-5.9500 Y2.4550
G82 X-5.9500 Y3.3450
G82 X-6.0500 Y1.8500
G82 X-6.1500 Y1.8500
G82 X-3.7500 Y5.9550
G82 X-3.7500 Y6.8450
M05
G00 Z0.0000
M06 T04 ; 0.0440
G00 Z0.3000
M03
G04 P3.000000
G82 X-8.8000 Y6.2000 Z-0.0700 F10 R0.3000 P1.000000
G82 X-8.8000 Y6.3500
G82 X-8.8000 Y6.5000
G82 X-8.8000 Y6.6500
G82 X-9.2000 Y6.2000
G82 X-9.2000 Y6.3500
G82 X-9.2000 Y6.5000
G82 X-9.2000 Y6.6500
M05
G00 Z0.0000
M06 T05 ; 0.0512
G00 Z0.3000
M03
G04 P3.000000
G82 X-4.4524 Y6.0000 Z-0.0700 F10 R0.3000 P1.000000
G82 X-4.6000 Y6.0000
G82 X-4.6024 Y4.0000
G82 X-4.7476 Y6.0000
G82 X-4.7500 Y4.0000
G82 X-4.8976 Y4.0000
G82 X-5.6024 Y4.0000
G82 X-5.7500 Y4.0000
G82 X-5.8976 Y4.0000
G82 X-0.6024 Y4.0000
G82 X-6.4524 Y6.0000
G82 X-6.6000 Y6.0000
G82 X-6.6024 Y4.0000
G82 X-6.7476 Y6.0000
G82 X-6.7500 Y4.0000
G82 X-6.8976 Y4.0000
G82 X-7.1024 Y0.5500
G82 X-7.2500 Y0.5500
G82 X-7.3976 Y0.5500
G82 X-0.7500 Y4.0000
G82 X-7.6024 Y4.0000
G82 X-7.7500 Y4.0000
G82 X-7.8976 Y4.0000
G82 X-8.5024 Y2.4000
G82 X-8.6024 Y4.0000
G82 X-8.6500 Y2.4000
G82 X-8.7500 Y4.0000
G82 X-8.7976 Y2.4000
G82 X-8.8976 Y4.0000
G82 X-0.8976 Y4.0000
G82 X-9.6024 Y4.0000
G82 X-9.7500 Y4.0000
G82 X-9.8976 Y4.0000
G82 X-1.3524 Y6.0000
G82 X-1.5000 Y6.0000
G82 X-1.6024 Y4.0000
G82 X-1.6024 Y2.8000
G82 X-1.6476 Y6.0000
G82 X-1.7500 Y4.0000
G82 X-1.7500 Y2.8000
G82 X-1.8976 Y4.0000
G82 X-1.8976 Y2.8000
G82 X-2.6024 Y4.0000
G82 X-2.7500 Y4.0000
G82 X-2.8024 Y6.1500
G82 X-2.8524 Y1.5000
G82 X-2.8976 Y4.0000
G82 X-2.9500 Y6.1500
G82 X-3.0000 Y1.5000
G82 X-3.0976 Y6.1500
G82 X-3.1476 Y1.5000
G82 X-3.6024 Y4.0000
G82 X-3.7500 Y4.0000
G82 X-3.8976 Y4.0000
M05
G00 Z0.0000
M06 T06 ; 0.0748
G00 Z0.3000
M03
G04 P3.000000
G82 X-8.3500 Y5.8605 Z-0.0700 F10 R0.3000 P1.000000
G82 X-8.3500 Y6.4395
G82 X-9.0000 Y5.4605
G82 X-9.0000 Y6.0395
M05
G00 Z0.0000
M06 T07 ; 0.1102
G00 Z0.3000
M03
G04 P3.000000
G82 X-3.9705 Y4.3937 Z-0.0700 F10 R0.3000 P1.000000
G82 X-4.3795 Y6.3937
G82 X-4.5295 Y4.3937
G82 X-4.8205 Y6.3937
G82 X-4.9705 Y4.3937
G82 X-0.5295 Y4.3937
G82 X-5.5295 Y4.3937
G82 X-5.9705 Y4.3937
G82 X-6.3795 Y6.3937
G82 X-6.5295 Y4.3937
G82 X-6.8205 Y6.3937
G82 X-6.9705 Y4.3937
G82 X-7.0295 Y0.9437
G82 X-7.4705 Y0.9437
G82 X-7.5295 Y4.3937
G82 X-7.9705 Y4.3937
G82 X-8.4295 Y2.7937
G82 X-8.5295 Y4.3937
G82 X-8.8705 Y2.7937
G82 X-8.9705 Y4.3937
G82 X-9.5295 Y4.3937
G82 X-0.9705 Y4.3937
G82 X-9.9705 Y4.3937
G82 X-1.2795 Y6.3937
G82 X-1.5295 Y4.3937
G82 X-1.5295 Y3.1937
G82 X-1.7205 Y6.3937
G82 X-1.9705 Y4.3937
G82 X-1.9705 Y3.1937
G82 X-2.5295 Y4.3937
G82 X-2.7295 Y6.5437
G82 X-2.7795 Y1.8937
G82 X-2.9705 Y4.3937
G82 X-3.1705 Y6.5437
G82 X-3.2205 Y1.8937
G82 X-3.5295 Y4.3937
M05
G00 Z0.0000
M06 T08 ; 0.1260
G00 Z0.3000
M03
G04 P3.000000
G82 X-0.0600 Y0.0700 Z-0.0700 F10 R0.3000 P1.000000
G82 X-0.0600 Y7.4300
G82 X-11.4400 Y0.0700
G82 X-11.4400 Y7.4300
T01
G00 Z0.5000
M05
M02

[ger21]

Variance where?