That’s weird, because LB does NOT choose the homing direction whatsoever. LB only sends the $H command to the laser firmware, which executes it. So only the laser is responsible for the homing, and it can’t change when you didn’t change firmware settings. So this must be something different.
That’s a misunderstanding. The origin button does not send the laser to any physical origin. It’s a user defined position and if you didn’t set it in the move window, the position is arbitrary. Do not click on that button until you want to use (and configured) the functionality of user origins.
First, in your device settings, disable “auto home at startup” and “return to finish position”. Both start to send the laser automatically, which you sometimes don’t want.
Once you turned that off, connect to the laser in LB and click on the Home button in laser window. The laser should start the same homing sequence as it does in LaserGRBL, moving the head to top-left.
If I open Lightburn (or LaserGRBL) it homes to 0,460. If I manually (buttons) move the laser to another position and click home afterwards, it homes to 0,0 and states 0,460.
I disassembled the complete machine, cleaned all the connectors, checked belt tension, wheel pressure on the rails etc pp.
I‘m going to put it back together in the evening and give you the result.
Thanks for the help and your time so far
Maybe send the homing command manually, it’s $H. Send it via the console. Where does it move to? If you jogged the head to some other position, is it reported correctly afterward?
It seems, like the amchine behaves ‘normally’ after rebuilding it. But i just tested it for like 15minutes… So it might have been some problem with the hardware.
Going to report back, whe I was able to verify it’s behaviour.
Home** and Origin are two VERY different things:**
Home = This is a machine mechanical position the laser goes to, determined by the laser controller. It is a fixed location (typically front left corner) and cannot be moved. (Yeah, I know it can, but not today.)
Origin = This is a software program 0,0 location and can be set anywhere in the workspace. If you have limit switches and Home the machine, it will typically set the Origin to 0,0 at that location.
The fact that you view your machine from the side, rather the end where the control panel is located, creates the situation illustrated by @misken’s first image. Lightburn works in the First quadrant (graph) where 0.0 is lower left and all moves are positive. In your situation, offset numbers must be assigned where needed to make this happen.
I am surprised (mostly) that it states this. Normally, travel of the trolley with laser attached is across the gantry and is the Xaxis. The travel of the gantry itself is the Yaxis. Does NEJE explain how to hook up a rotary with their suggested orientation?
