Category: Fusion 360
This is a long shot but I have been working on a live tool system for my sherline lathe. I am using a tryally QCTP and created a mount for a 33mm 60krpm spindle that I manually control. I modified a hass millturn lathe to output XZC moves only, and modified to use startcode that work with linuxcnc. However, I am noticing an interesting behavior that I am wondering if it is even fixable - it must be, no?The problem: Let';s say I have the endmill parallel to the Z axis, meaning it is in line with the axis of the part (the C axis), and I create a tool path that mills out a wobbly shape out of bar stock, but I need to do it in multiple stepdowns. The post and linuxcnc work as expected for the first stepdown, however, when moving to the next stepdown, it does not reorient itself back to C0, instead it simply continues to mill out the shape exactly where it left off. This means that the second stepped down wobbly shape is some random angle ROTATED from the top (first stepdown) portion. This obviously is not feasible for making parts...However, I am struggling to figure out a solution. One possibility is to try to introduce logic into the post processor that can try and detect when Z distance changes some value and somehow force a reset back to C0 to restart the second stepdown exactly where it needs to, but this seems complex especially if I am going to be varying stepdowns depending on what material I use, what endmill I use, etc.Has anyone thought something like this through? I will upload my Gcode for you all to see. The first stepdown is Z=-6, and the second stepdown starts at Z-10.
Edit: I added the base Haas post processor that I am using. I almost wonder - shouldnt the post processor have some way of handling this itself? I cant imagine I am the only one trying to do such a cutting move?
