[Wolfman2332]

OK - after an hour of messing around, I am turing to you foks for help. Here is what we are trying to do:

'Machine a slot in 2 steps in a 2" block 1.25 deep.
I want the path to exit the part by .625, rapid down, and then cut the bottom pass.

Bobcad wants to reverse the G01 back to the leadin point, then go down and do the next pass.
I have attached the BBCD file for you thoughts.

[the_gentlegiant]

Simple... go into the G code that BobCAD creates, delete or change the couple lines you don't like, and run the part. A little manual intervention will get the job done. Spending hours getting your software to do what you want doesn't. Especially when all we're talking about is a two pass slot.

[The Engine Guy]

Came across this issue a couple of years ago with another Poster, you can do it using the "3 Axis Wireframe" option, just draw the geometry you want to cut which in your case amounts to 3 lines and then just have the feature follow the lines.
Small downside is that when it reaches the end of the first level cut it only goes down to the next level at Feed rate not rapid, you could easily put a G0 @ line 90 and back to G1 @ line 100 in the code, if you can live with that then give it a try

You don`t say what version of BobCAD you are using so I don`t know if you will be able to open the attached file but here it is anyway, done in V28.

Sample code :-

(FIRST CUT - FIRST TOOL)
(Machine Setup - 1 3D Engrave Rough)
(FEATURE 3 AXIS WIREFRAME)

(TOOL #1 0.5 1/2 FLAT ROUGH ENDMILL - STANDARD)
N20 T1 M06
N30 G90 G54 X1.625 Y0. S3880 M03
N40 G43 H1 Z1. M08
N50 Z0.2
N60 Z-0.525
N70 G01 Z-0.625 F22.3148
N80 X-1.625 F39.3701
N90 Z-1.25
N100 X1.625
N110 G00 Z0.2
N120 Z1.
N130 M09
N140 M05
N150 G91 G28 Z0.
N160 G91 G28 Y0.
N170 G90

(END OF FILE)
N180 M30

(END OF PROGRAM)
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Regards
Rob