sliptonic wrote: ↑
Mon May 14, 2018 3:19 pm
Contour, Face Profile, and Edge Profile, all have a start point property. Are you saying this doesn't work correctly?
Sorry, Can I choose a point and set it as starting point? How? Or I can only manually input coordinate? I need an easy way to point the start on contour. And I need a starting point on every
contour I will cut in every
part on sheet.
there are so many dxf versions and implementations and the options for what you can (validly) do in a dxf is big. Import is always going to be a messy process.
I understand the huge problem behind dxf and dwg, but still, in real life - every customer will bring me a dxf, or even dwg of latest autocad. And there is no way to convert it in format that FreeCAD understands. Only if someone produces everything from scratch in FreeCAD, only then he can avoid this problem. But it's a very rare situation, I dream to have that kind of workflow, but it's almost unreal (in metalworking at least).
Need more detail. Pictures, description of how it's failing. Bug reports. Just saying it's doesn't work isn't good enough.
I understand. I will try to start separate thread about this problem this week.
[*]Cutting regimes. Man I hardly imagine it would be done without serious material management, torch management, corner management... And add to this how different controllers can be, No, I don't believe it can be done. No silver bullet in this area.
A lot can be done with job templates and setup sheets but there is plenty that still needs to be developed.
No, I just don't believe it. I am not a plasma or laser or waterjet specialist, but I've had to set postprocessor in Lantek for four different plasma machines in the past... Man, there is no standard for them. One machine writes piercing, leadin/leadout and every needed parameter in the end of the file in format that only machine understands (no explanation for these magic numbers), Other needs to set everything, including corner management in subprograms. Third uses it's own subprograms with options that manufacturer doesn't want to uncover because "there is a postprocessor for that program of this developer that you can purchase". Last machine was easiest for me, there was no cutting control in the code, everything is in predefined recipes, so you need to only give command to move and to lift up, and get down the head, every piercing is done automatically and contour is cut by a recipe. And off course I tried to use FreeCAD here, with partial success.
Oh, forgot to mention - G41 and G42, tool diameter offset. FreeCAD doesn't have this feature, it is a big misfortune. Imagine, I've generated huge program for hundreds of parts in a 6meters long sheet, It starts cutting, and I see that offset is wrong. What is easier: run to the office, open that project in FreeCAD again, fix tool diameter, regenerate everything (with possible problems), then upload it to the machine via network, or a flashdriver, or even rs232 cable. Or Just change tool diameter directly in machine? This applies to any kind of machine, plasma, milling, lathe and so on.