GCode for curve incorrect.
Posted: Thu 22 Feb , 2024 21:30 pm
The attached .DWG file is imported into QT2DD and used to produce a .LCM drawing. The Cam Wizard is then used to create a .FNL file containing the GCode for producing the part.
If a simulation is then run in QT2DD the RH turning tool cuts the curve nearest the chuck correctly. Next I would expect the LH turning tool to cut the curve furthest from the chuck, the billet being sufficiently long to prevent the tool exceeding movement limits on account of its proximity to the chuck jaws.
What actually happens is that the parting/grooving tool cuts a series of steps approximating a curve which is then smoothed out by the parting/grooving tool following a curved path. However the curve is convex rather than concave.
I haven't tried to machine the part for real, so I don't know whether it's a problem with the GCode or the simulation.
Either way can the problem be fixed please?
Thanks, Max.
If a simulation is then run in QT2DD the RH turning tool cuts the curve nearest the chuck correctly. Next I would expect the LH turning tool to cut the curve furthest from the chuck, the billet being sufficiently long to prevent the tool exceeding movement limits on account of its proximity to the chuck jaws.
What actually happens is that the parting/grooving tool cuts a series of steps approximating a curve which is then smoothed out by the parting/grooving tool following a curved path. However the curve is convex rather than concave.
I haven't tried to machine the part for real, so I don't know whether it's a problem with the GCode or the simulation.
Either way can the problem be fixed please?
Thanks, Max.