I have agreed to machine some components for someone, as a good gesture and think I have gone in over my head.
I have received some MC files that this person purchased that they are Imperial where as my machine is set up as Metric. I initially thought I would be able to modify the code in an excel spread sheet or with some VBA routines. However looking at the file format it isn’t fully as i expected.
Interesting Mach 3 reads the file in no problem, and changing the g20 to g21 it looks like when air machining it would machine the components- at a 40th scale. I have attached the header of one of the files, I don’t understand how it works without any xcoord data. I assume the N** is just line numbers.

So the question is there some software that can do the conversion properly, feeds and speeds too, and visualise it better than in mach3. Or is it simpler for me just to make an imperial set up file in mach3. With the later I am nervous about using other people’s files - when I don’t understand the pedigree or file format.


PROGRAM NAME - 001.3.NC)
(POST - BC_3X_MILL 3-AXIS GENERIC FANUC)
(DATE - THU. 07/23/2020)
(TIME - 05:03PM)


(FIRST MACHINE SETUP - MACHINE SETUP - 1)

N01 G00 G17 G40 G49 G54 G80 G20 G90

(FIRST CUT - FIRST TOOL)
(MACHINE SETUP - 1-FEATURE 3 AXIS-PLANAR)
(FEATURE 3 AXIS)

(TOOL #4 0.5 0.500 DIA. 0.250 CRAD. 4 FL.1.125 CL)
N02 T4 M06
N03 G54
N04 G00 G90 X-11.781 Y12.2657 S595 M03
N05 G43 H4 D4 Z1. M08
N06 Z0.2
N07 Z-0.65
N08 G01 Z-0.75 F20.
N09 Y12.2888 Z-0.7734 F180.
N10 Y12.3143 Z-0.7971
N11 Y12.3399 Z-0.8184
N12 Y12.3689 Z-0.8405
N13 Y12.398 Z-0.8604
N14 Y12.427 Z-0.8783
N15 Y12.4561 Z-0.8943
N16 Y12.484 Z-0.9082
N17 Y12.5118 Z-0.9205
N18 Y12.5397 Z-0.9316
N19 Y12.5676 Z-0.9413
N20 Y12.5968 Z-0.9502
N21 Y12.626 Z-0.9577
N22 Y12.6538 Z-0.9637
N23 Y12.6817 Z-0.9685
N24 Y12.7101 Z-0.9724
N25 Y12.7386 Z-0.9751
N26 Y12.7953 Z-0.9772
N27 Y12.8239 Z-0.9766
N28 Y12.8526 Z-0.975
N29 Y12.8809 Z-0.9724
N30 Y12.9092 Z-0.9685
N31 Y12.9371 Z-0.9636
N32 Y12.965 Z-0.9576
N33 Y12.994 Z-0.9501
N34 Y13.023 Z-0.9413
N35 Y13.0507 Z-0.9316
N36 Y13.0784 Z-0.9207
N37 Y13.1061 Z-0.9084
N38 Y13.1338 Z-0.8947