I'm not sure if I can be of help, I use BobCad, but not as a post processor, I use Sheetcam.

THE FIRST PERSON!! Thanks I am not a superscientist, I 'm just the villageblacksmith!! The first person (or wizard or genius) to set me back on the road with both problems will find in their mailbox(after pm'ing me your address) a check for 100 u.s. If you can solve this I will say you are a genius!! Now, I realize that your time is valuable, as mine also is. To recap: bobcad v21express with mach2 using both oxy-fuel and plasma. We are using a 6x12 plasma table built by plascutter out of Alberta, Canada. The pierce time was programmed the same as the plasma torch. Before, when we programmed for its use, after selecting the oxy torch from the menu, a small dialogue box would pop up where we would enter the pre-heat value. If you can help with that issue, I will call you a wizard!! The second thing that has distressed us is with the oxy-fuel torch. On projects with lots of g-code it becomes quite burdensome. For example, the m03 command is always at the wrong place, but we can edit that.

We got it to generate the code more or less correctly, but it still has its quirks. After we installed v21express and mach2 on the 'new' one, we discovered that all was not well. Of course, the computer died when it reached the expiration date. In the beginning(2006), I didn't understand the need to have all programs backed-up. I am needing help understanding how to modify the mach2 post for bobcad v21express so that it will generate it right the first time. I understand how to edit g-code after it has been generated by a postprocessor.

Bobcad 21 dxf import options menu