So after using the lowrider pretty intensively over the past 2 weeks I developed my own routine. I’m not sure it’s right but it works, but it could probably be better.
I have 4 x 1/2" shims that put next to the Z-rods to hold them up so the router bit doesn’t hit my spoiler board when I power down the unit and so it’s level in all 4 corners.
To start a job I power the unit on, raise the Z axis above my work material. I have the X axis start configured to 10 mm from my work material. (so home in CamBam (for Linux) is -10,0) so it’s not sitting over it, just next to it. The CNC is smart about the fact that my Z position is already where I told it to lift to in CamBam so lining up my work is pretty easy for my 1st print. For my 2nd print I have to manually bring the CNC back to 0,0,0 using the knob. Is there some post processing code that would do that automatically?
I should mention that for my first 2 week learning curve I’ve been mostly limiting my jobs to a single piece or just a few simple pieces. I’d hate to screw up a whole sheet. So this technique worked pretty well as it allowed me to position smaller pieces, including scraps just big enough, right at where the CNC would start.
Another question: there were occasions where it would have been great to set the CNC to a new zero location. Say I had a small piece that was easier to clamp closer to the edge of the table so having a lower (or higher) Y home would have been helpful. Is there a way to do this?
Also, is there a way to have the Home functions simply return the CNC to it’s 0 positions? I get the impression that like my 3D printer the Marlin software is expecting input from endstops. Even if I could add some post-processing code to return it to 0 after the job I’d still like to be able to do this manually since I might abort a job and then want to get back to home.
Any feedback and help would be much appreciated!
I’m loving this machine by the way. It’s cutting great despite my plates being all hand cut. So well that I’ve been delaying machining replacements since I’d have to take much of it apart. I’m about to order a nice stack of Ultralight MDF, going to cover my entire table (just using a small spoiler board right now for my so far small jobs), surface the top of it and maybe hook a vacuum to it to see how well that works vs. clamping. I’m really getting into it and thinking of more projects all the time.
Thank you!