I know little about this dragknife thing and less about the FreeCAD features available to deal with it.
Nonetheless, I am looking at your image posted with the similar geometry and would assume that some sort of lead-in path or dress-up is needed to orient the knife before lowering at the first/initial corner, and beginning its path. Looking at each of the other corners, they each have a 90 degree turn-out to orient the knife for the segment to cut. I think what the ticket and Sr. Robles are referring to is this need for an initial orientation path maneuver leading up to the first plunge and cut. If the user has not pre-oriented the knife to the correct position before the initial cut, that first corner will likely not be cut correctly.
... and my two cents here may be worth more like two mils, than cents. Just an observation that raised my curiosity. Reading and looking at Sr. Robles original post at Pruebas con ¿Navaja de arrastre? drag knife
, I see his OP geometry and path image is almost identical to @Sliptonic's. The only variance is the second corner, moving clockwise, now DOES have the correct orientation maneuver that was lacking in Sr. Robles original. Based on that the issue, it would appear that bug has been fixed since then.
In a follow-up post in the original Spanish thread, Sr. Robles also asked about the addition of a lead-in maneuver to be added that would orient the knife correctly leading into the first cut. Any progress on this additional feature? Just asking, on behalf of Sr. Robles. If that has not mentioned since, it is likely a moot point to be dismissed.
sliptonic wrote: ↑
Mon Jan 06, 2020 5:06 pm