I think its related to my X axis. I’ve setup the my endstop and x stepper direction to home in the lower right hand corner as seen here. This is opposite of the LR3 - homing the X parked the core at the furthest point away from the Y rail (leftside). Homing X, Y, and Z all behave and drive in the direction I’d expect them to (Positive direction away from the home point). I’m pretty sure when I put the LR4 back together I flipped the plug on the X to home it in the lower right corner.
I tried parking the core at the far end M92X0 and drawing some circles with a marker taped to the core. They did draw but were mirrored which seems to indicate X is flipped.
So the question is, whats the easiest way to keep my home location in the lower right? Do I need to edit something in the SKR firmware to flip the axis. Flipping the X stepper wouldn’t home in the right direction?
If you are homing with (0,0) in the location noted in the picture, you have basically created a “Landscape” orientation, where the long axis (normally Y) is now X, and the gantry (normally X) is now Y.
I would think that you need to swap the motor wiring around such that when you home Y, the router (not the gantry) moves toward the rail, and when you home X the gantry (not the router) moves left toward the where you have labelled X/Y Home.
Did I misunderstand the option for endstops on both sides of the core? Nearest to the Y should only be though of only as a limit switch then, not used to home close to Y. So closest to the Y rail is X max then? And based on my picture Lower Left hand corner should be considered (0,0) and coordinate system expands out from that in positive. Apologies for being a dummy.
I originally had it assembled per the instructions then saw some post somewhere about the abundance of locations for endstops and took that to mean “configure as you like”. I should have known better. In my case with the LR3 I was squaring the MDF off a distance from the Y rail and just thought it strange to home the core X the furthest away from the work piece and away from me. That may have more to do with my cramped working space and how I’ve arranged the table than anything you’ve done.
We argued a lot about me including them during the beta tests, I knew it would cause confusion. If I can not figure out how to change the instructions enough I might go back to not having them and offering the current parts as optional “mods” so this does not keep happening.
Interesting to hear you changed them after the fact, that is not an easy job at all.
The only issue is that the current models have already been downloaded over 1400 times…
So you’ll probably still have to add a Note/Warning at the beginning of the docs about the correct endstop configurations, and warning people away from filling those extra holes
Yeah taking it back out and re routing the wires wasn’t fun. I could have sworn I saw a photo somewhere in the instructions with it on that side but I might be imagining it.
I think a note in the instructions just stating a single endstop should be installed on the left side of the core if you’re staring at the front, and the right side is akin to the dual end stops on the mpcnc and only used as a limit switch. Knowing it has a very specific use may stop further experiments.
Has that been there from the start? I don’t ask in an accusing way, I’m sure I 100% blew past it. I thought the instructions might have been in flux when I assembled mine almost a month ago. So if it was added later maybe more people picked up on it hopefully. If it’s always said it, most likely I thought I’ve built a few of these I know what I’m doing and casually took the directions as suggestions. It’s totally on me.
I only ask for a sanity check and the fear I missed something else.
The LR4 has not actually been “officially released” The parts are up and the instructions are getting worked on every day. So there is a good chance that was not there when you built yours.
Now where did I put those nothing parts… I actually did make parts to stuff those holes in the wheel parts, but I don’t remember where I filed them, so I haven’t printed or installed them, but I think about them every time I blow chips out of those holes.
Time to add a quiz before posting lol kidding of course. Love the idea of multiple end stop configurations, honestly I’ve seen more confusion over it though, maybe taking em away and leaving the current parts as mods may be best
