I'm new to using offsets in Mach 3 and want to start running some of my CAM based on a G55 offset. How can I change BobCAD to export my GCode as a G55 offset (versus the default G54)?

I'm new to using offsets in Mach 3 and want to start running some of my CAM based on a G55 offset. How can I change BobCAD to export my GCode as a G55 offset (versus the default G54)?


You really don't need to do that. All you need to do is a Find and Replace in the Editor or in NotePad/WordPad.

Find:G54
Replace with: G55

Toby - that's what I've been doing, but it adds an extra (unnecessary) step between exporting my GCODE from Bobcad and opening it in Mach3. If it's the only solution, so be it. I would think BobCAD would allow me to "tell" it to run a certain program with a certain offset.

Is this a common feature in other CAM programs?

Toby - that's what I've been doing, but it adds an extra (unnecessary) step between exporting my GCODE from Bobcad and opening it in Mach3. If it's the only solution, so be it. I would think BobCAD would allow me to "tell" it to run a certain program with a certain offset.

Is this a common feature in other CAM programs?

The only other way I can think of is to Edit the Post Processor, or copy it 5 times and place a G54,G55,G56,G57,G58, and G59 at the end to identify which is which.

Personally, I like to fine tune Programs for efficiency and other little things.

I found a bug in the program related to this, even if you make another post processor, say a g55 post, and then close bobcad, then open it back up, even if the g55 post is shown, it will post to the g54. Check the output to mach.

If anyone has a minute to verify this on your side, I would appreciate it, cause it drives me crazy I almost crashed my endmill into my fourth axis (I run four axis at g54, vise at g55

If you are running V22 you could hard code the G55 in the post. You do this by not calling the variable but using " " instead this will hard code the G55 into your programs.


If you are ruing V23 you can choose what work offset you are in.

Also the just release the save a load feature item which means you can setup a feature and setting save it and load it as needed. Great for drilling and setting up tool set over and depths for different materials ! Go BobCAD !