I created a PR:
https://github.com/FreeCAD/FreeCAD/pull/1475

The term "IgnoreAbove" probably carries little meaning unless the user already understands the shorthand notation. If I understand the logic, then "BeginAtStartDepth" might be a bit clearer. Good suggestion. Actually, I went even further and called them UseStartDepth and Dressup...

I spent a few minutes looking at this.. I don't have any experience in Roland machines or that control language. Wow, what a language. :) But I may have a clue about what is going on. Two things: First, there is no support for arc movements in the language, so the post processor tries to split them ...

Here's the commit: https://github.com/pekkaroi/FreeCAD/commit/cd2947f7f31f0a5f33194ccc58ca8bde0a25a53f So now the dressup contains new parameters IgnoreAbove (true/false) and IgnoreAboveDepth. (Please, come up with better names). The IgnoreAboveDepth is set to the start depth of the base op when the...

Hi roivai, looks good! Did you change the behavior of the first round only by the helical ramp or at every ramp style? I changed all the ramp/helix entry methods. `PathDressup.baseOp` is what you're looking for - although, it might not be what the user wants. There might be dressups that have speci...

Would that address the steepness issue? I think it would. I tried that out and it works quite OK (based on the paths shown here, no actual machining or even simulation tried..) So I added a parameter to the dressup to ignore movements above start depth of the base object. To test I created a helix ...

Hi, The ramp/helix dressup is quite dummy. The helix algorithm simply looks for a straight down non-rapid movement and a closed loop of constant-Z movement after that. If such condition is found, it is replaced with a helix covering the depth of the original Z depth. So because the original operatio...

Hi, I don't know if this question would be for the GUI design or Path, but anyway, I tried to modify the preamble argument for LinuxCNC post processor. The default, according to the source code is "G17\nG90". I'd like to add one more line to that, but it appears that if I try to write to t...

Hmm, seems that I'm late for this party.. Here's the commit, but I suppose the release has been done already?
https://github.com/pekkaroi/FreeCAD/com ... 545ac486aa

OK, I'll try to make a pull request during next weekend.