# Failing to home - ORTUR laser master 3 LE

**URL:** <https://forum.lightburnsoftware.com/t/failing-to-home-ortur-laser-master-3-le/138314>\
**Category:** Ortur Lasers\
**Created:** [May 7, 2024, 4:30am UTC](https://forum.lightburnsoftware.com/t/failing-to-home-ortur-laser-master-3-le/138314 "2024-05-07T04:30:33Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![qwanzaden](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/q/919ad9/32.png) [@qwanzaden](https://forum.lightburnsoftware.com/u/qwanzaden)\
**Post date:** [May 7, 2024, 4:30am UTC](https://forum.lightburnsoftware.com/t/failing-to-home-ortur-laser-master-3-le/138314/1 "2024-05-07T04:30:33Z")

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I have a new (\<100 hours of use) ORTUR laser master 3 LE, which randomly fails its homing cycle/procedure.

The ORTUR laser master 3 and laser master 3 LE (LM3LE) [does not use a limit switch for its homing cycle](https://www.youtube.com/watch?v=CUwRbCAWIs4). My LM3LE sometimes [successfully homes](https://youtu.be/7II_EER7Q8E), sometimes [throws a error](https://youtu.be/6UHT700n8AQ), and sometimes [endlessly rams itself into the hard stops](https://youtu.be/mOP4MPjHYyo) making a rattling noise. This appears to be a failure of ORTUR’s software-based jam detection algorithm.

As a workaround I [disabled the homing cycle](https://imgur.com/PT5jLy8) to prevent damage to the LM3LE, but its a huge problem not being able to home. I’ve tried to find a cause-and-effect to the problem but can’t find one. The machine has periods of working, then periods of not working. [Other](https://forum.lightburnsoftware.com/t/ortur-laser-master-3-making-horrible-noise-when-homing/76882) [people](https://forum.lightburnsoftware.com/t/ortur-laser-master-3-y-axis-motors-dont-stop-during-homing/99447) [are](https://forum.lightburnsoftware.com/t/ortur-laser-master-3-le-start-position/109306) [having](https://forum.lightburnsoftware.com/t/ortur-laser-master-2-several-topics-servo-motor-loud-noise-when-homing-botched-firmware-upgrade/44234) [this](https://www.reddit.com/r/OrturLaserUsers/comments/y5jd43/ortur_laser_master_3_wont_home_properly_and_light/) issue [too](https://forum.lightburnsoftware.com/t/laser-ortur-master-3-making-homing-noises/116892). I’ve contacted ORTUR and will add their feedback when they give it.

Cross posted [here](https://www.reddit.com/r/OrturLaserUsers/comments/1cm36js/failing_to_home_ortur_laser_master_3e/). Firmware is version 209 (most recent).

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**Author:** ![gilaraujo](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/gilaraujo/32/71745_2.png) [@gilaraujo](https://forum.lightburnsoftware.com/u/gilaraujo)\
**Post date:** [May 7, 2024, 9:23am UTC](https://forum.lightburnsoftware.com/t/failing-to-home-ortur-laser-master-3-le/138314/2 "2024-05-07T09:23:22Z")

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A video of the machine homing would be greatly helpful

Belts tension and frame squareness are paramount on Switchless homing machines as is all done by software.

A video would help to validate that

Or if you like to test belt tensions engrave this pattern on a bit of cardboard and take an up close picture

[Dot Test with Angle.lbrn](https://forum.lightburnsoftware.com/uploads/short-url/nA1rzsEq585ayw9Ft6jSG3dcvry.lbrn) (46.3 KB)

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**Author:** ![qwanzaden](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/q/919ad9/32.png) [@qwanzaden](https://forum.lightburnsoftware.com/u/qwanzaden)\
**Post date:** [May 8, 2024, 6:11am UTC](https://forum.lightburnsoftware.com/t/failing-to-home-ortur-laser-master-3-le/138314/3 "2024-05-08T06:11:49Z")

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The last three links in the second paragraph of the original post are links to videos of the three kinds of homing cycles I am seeing (working, error, and noisy ramming). The x axis belt seemed loose to me but I don’t see how to tension it.

Here are two photos of the pattern that you sent me.

 ![20240507_235903](https://forum.lightburnsoftware.com/uploads/default/original/3X/7/4/74288914318677bca5fe9f715074456dbdcbcd5a.jpeg)  
 ![20240507_235922](https://forum.lightburnsoftware.com/uploads/default/original/3X/2/a/2a67b51106852e44ad76ea077948b954f0c6f437.jpeg)

And [here is a link to a video](https://youtu.be/WVc6aO8-XkQ) of me plucking the y axis belt. At a previous job we used the frequency of the vibration of belts to determine their tension so… maybe that’s helpful?

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**Author:** ![gilaraujo](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/gilaraujo/32/71745_2.png) [@gilaraujo](https://forum.lightburnsoftware.com/u/gilaraujo)\
**Post date:** [May 8, 2024, 8:06am UTC](https://forum.lightburnsoftware.com/t/failing-to-home-ortur-laser-master-3-le/138314/4 "2024-05-08T08:06:42Z")

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The patterns are spot on.  
So i am assuming what is happening on the homing is intermitente.

But not related per se on belt tension.

Try $RST=\* in console to reset all to defaults  
And [support@ortur3d.com](mailto:support@ortur3d.com) to know if they have any newer firmware  
Seems to me though it might be more firmware side than mechanical

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**Author:** ![qwanzaden](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/q/919ad9/32.png) [@qwanzaden](https://forum.lightburnsoftware.com/u/qwanzaden)\
**Post date:** [May 9, 2024, 10:30pm UTC](https://forum.lightburnsoftware.com/t/failing-to-home-ortur-laser-master-3-le/138314/5 "2024-05-09T22:30:57Z")

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After tightening the X axis the device homes correctly without making a loud clicking noise. [Video for X axis tightening](https://www.youtube.com/watch?v=wjSDBLO7K5k). I suspect the belts should be tightened until each side of the belt makes a low-pitched humm instead of “flop”-ing when plucked. Thank you @gilaraujo for your help.

The X axis belt on my machine is as tight as the screw will allow, but is still loose. I’m lucky the machine functions despite this. For people who can’t tighten the Y axis enough, playing with the pictured values might save you? Its scary the machine’s “limit switches” can malfunction like this.

 ![Screenshot (96)](https://forum.lightburnsoftware.com/uploads/default/original/3X/7/c/7cc74ba8ab519291a3ec98299f0a879feb75b60b.png)

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**Author:** ![system](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/system/32/64335_2.png) [@system](https://forum.lightburnsoftware.com/u/system)\
**Post date:** [June 8, 2024, 10:31pm UTC](https://forum.lightburnsoftware.com/t/failing-to-home-ortur-laser-master-3-le/138314/6 "2024-06-08T22:31:21Z")

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Closed on June 8, 2024, 10:31pm UTC

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