Sorry for the cross post, but I realized that some of my questions in the machine shop topic are better asked here in the Laser topic.
The part I’m working on is a template for manually drilling holes in some thin plastic protective sheets which go inside a metal enclosure with various PCBs and cables. I’ve cut several versions of the part with some success, however I’ve noticed a scaling or accumulation error which is affecting the placement of holes as well as the overall size of my template when cut by the laser cutter.
Here is a description of my workflow:
The original part drawing is in ACAD (dwg). I convert this to DXF using a discontinued Autodesk program called Autosketch. Then I import the DXF into Adobe Illustrator and save it as a .ai. Lastly, I import it into RDWorks and cut with the laser.
The center of the template seems to be perfectly aligned with the metal part, however, all holes in both X and Y directions from the center get farther and farther out of alignment toward the edge of the part.
The part is roughly 48" x 20". The accumulated error is aprox .125" in the X direction and .050" in the Y direction at each end.
Currently, I can verify that my tools seem to verify that the conversion from DWG to DXF doesn’t seem to introduce any error. I’ll have to get back to DMS and check further down the chain.
It may be that the software is all correct and that the laser cutter tool itself is introducing the error. I don’t know yet. I’ve only tried this on Big Laser since the part is so long.
Does anyone have any experience or suggestions?