Elegoo limit switch install post issue

LightBurn Hardware Compatibility GRBL
1

Elegoo 20 watt. I installed a limit switch set. It now homes ($22=1). Two problems; 1. When I frame, the gantry (X axis assembly) bounces off the rear (frame) baffle. It then moves a few inches away, and will then frame. But! See problem 2
Problem 2: In lightburn, I have the image at the top right corner of the screen. But the laser now frames in the lower right. Opposite location of the image on the screen.
Is this a setting problem?

2

Yes. Show some screenshots of your settings. Which corner do you home to? Did you set this origin in LB as well?

3

![Device Settings|448x500]
(upload://1Z5JRKF4UJPr1rZB0vWwRSBOGAW.png)

Machine settings
Machine settings484×639 22.6 KB

I hope these are the settings you asked for.

4

Device Settings
Device Settings664×741 26.8 KB

5

I home to the left rear corner. All of my Xtool D1’s are set that way. I prefer it, because I’m removing product that I just made. Does it matter where I set the homing???

6

Yes, because if the machine attempts to home at a position where there are no home switches, then homing will fail. If the home switches are in the left rear corner and it moves toward that corner when homing, then that’s correct.

The Homing and Limits settings have unusual values:

  • If the machine travel limits in $130 and $131 match the physical machine limits, then Soft limits should be True so the controller can prevent crashes.
  • Unless both axes have home switches at one end and limit switches at the other, Hard Limits must be False.
  • The Homing pull-off distance of 1 mm seems low and may not completely release the switch actuator; most switches require about 3 mm. Increasing the pull-off may require a corresponding reduction in the axis travel limit.
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7

Which position does it report after homing? It has to report 0,maxY if homed to the rear right. If it does, set the origin to front left as usual for diode lasers.

8

Hi! Okay! I believe the problem is solved. Your reply:

  • The Homing pull-off distance of 1 mm seems low and may not completely release the switch actuator; most switches require about 3 mm. Increasing the pull-off may require a corresponding reduction in the axis travel limit.
  • I increased the Homing Pull-off to SIX! Not 3. Six! The gantry does not bounce off the rear frame anymore. And it frames in Absolute Coordinates. By the way, I purchased my limit switches from Geeks at Large.com When I emailed them about my problem, they were very helpful. But! The solution was found here. Thank you, Ednisley!(Profile - ednisley - LightBurn Software Forum)

Ed Nisley

1 Like
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image
image479×637 22.4 KB