Hello Craig,

Yes I can help you! So you are having problems with using the chamfering feature, I have some questions for you.

1) What version of BobCAD are you using?
2) Are you using a sharp bottom tool or Flat bottom tool?
3) When you say you had a crash what happened?
4) Can you share a drawing file and or the parameters you used when you had the issue?


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Code:
( TOOL # 1 0.5 CHAMFER MILL)
N02 T1 M06
N03 M01
N04 G90 G54 X-1.35 Y0. S1252 M03
N05 G43 H1 Z0.1 M08
N06 G01 Z-0.13 F5.011
N07 Y-0.25 F9.772
N08 G17 G03 X-1.1 Y0. I0. J0.25
N09 G01 Y0.75
N10 G02 X-0.75 Y1.1 I0.35 J0.
N11 G01 X0.75
N12 G02 X1.1 Y0.75 I0. J-0.35
N13 G01 Y-0.75
N14 G02 X0.75 Y-1.1 I-0.35 J0.
N15 G01 X-0.75
N16 G02 X-1.1 Y-0.75 I0. J0.35
N17 G01 Y0.
N18 G03 X-1.35 Y0.25 I-0.25 J0.
N19 G01 Y0.
N20 G00 Z0.1
* The above code is based on a 1/2" Sharp bottom tool that has a .1 cutter position and a chamfer depth of .03


Code:
( TOOL # 1 0.5 CHAMFER MILL)
N02 T1 M06
N03 M01
N04 G90 G54 X-1.3 Y0. S1252 M03
N05 G43 H1 Z0.1 M08
N06 G01 Z-0.08 F5.011
N07 Y-0.25 F9.772
N08 G17 G03 X-1.05 Y0. I0. J0.25
N09 G01 Y0.75
N10 G02 X-0.75 Y1.05 I0.3 J0.
N11 G01 X0.75
N12 G02 X1.05 Y0.75 I0. J-0.3
N13 G01 Y-0.75
N14 G02 X0.75 Y-1.05 I-0.3 J0.
N15 G01 X-0.75
N16 G02 X-1.05 Y-0.75 I0. J0.3
N17 G01 Y0.
N18 G03 X-1.3 Y0.25 I-0.25 J0.
N19 G01 Y0.
N20 G00 Z0.1

* The above code is based on all the same settings except the cutter position is now set to .05

What you'll notice is the greater the cutter position is the the deeper in Z the tool will go.