Hello, I have an OpenBuilds Lead Machine 1010. I've used it successfully for several jobs, but recently when I'm trying a new one in Fusion and the control software, it's dragging to the initial first toolpath. I'm doing a Drill first, and in the software it appears the clearance and retracts are fine and I can also see it retracting fine in the software. However, when I start the job after zeroing everything, it will go straight to the zero like it should, but it's not lifting any and just dragging along the wood to try and get to it's first point? I'm tried everything and not sure why it's doing this? Hasn't done this before -- In the control software, under the simulate, it also appears as the white line and it appears to be right on top of the surface of the material? What am I missing? Thanks a TON for any help! Finally had a Saturday to work on this and now I'm stuck. Go figure.
Are you remembering to HOME the machine? (Clearance moves are in Machine Coordinates, so needs Homing then SetZero)
I have not done that in a while, but haven't had to do it in a while -- do you have to do it every time you start up the machine? Thanks for the info and I can try that. I figured zeroing the work material was enough for it to know where it's starting? I'll give that a shot today. Thank you!
Yes, homing sets the back, right, up corner as a reference point for the MACHINE co-ordinate system. Your job runs in a WORKPLACE coordinate system, but that is an offset from the MACHINE co-ordinate system so homing sets the reference point for everything else. Safety moves often use the MACHINE co-ordinate system so it is vital that you home your machine everytime you switch on. Alex.
I think F360 GRBL Post Processor does that - nothing to do with homing. I just remember to lift the bit up before starting the program. (I'm still using the Autodesk Post Processor in F360 - it maybe that David the Swarfer's POST for F360 does something better.)
the autodesk post uses G28 'preset position' for safety moves or a 'make no assumptions' option that will crash horribly if you are not careful. The Openbuilds POST (which I maintain) always uses G53 for safety Z moves (same all the proper machine posts), which means the machine must always be homed.
Yes sir -- that did the trick!! Crazy and thanks so much. After that, ran the job and the spindle lifted up properly and without issue. I'll remember to do that every time now. Appreciate it tons! -Scott D
Also, is there any way to set the limits on the back end of the machine? My job yesterday ran too far back and was hitting horribly on the back nuts. There is no limit switches back there and was surprised. I'm sure I can set that somewhere in the system? Thanks again!
Check your Max Travel values in Grbl Settings. See Grbl v1.1 Configuration Can home to the front, Max Travel calculates the theoretical back corner from there
Ok sweet - thanks for the info. I thought that was already set in there, but I might change it slightly.
