# Omtech displays and cuts different than what's in Lightburn **URL:** \ **Category:** LightBurn Software Questions\ **Tags:** trocen, ruida, firmware, omtech\ **Created:** [November 13, 2025, 8:01pm UTC](https://forum.lightburnsoftware.com/t/omtech-displays-and-cuts-different-than-whats-in-lightburn/184930 "2025-11-13T20:01:07Z")\ **Posts on this page:** 16\ **Page:** 1
**Author:** ![Mike\_at\_launchpad](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/m/76d3ee/32.png) [@Mike\_at\_launchpad](https://forum.lightburnsoftware.com/u/Mike_at_launchpad)\ **Post date:** [November 13, 2025, 8:01pm UTC](https://forum.lightburnsoftware.com/t/omtech-displays-and-cuts-different-than-whats-in-lightburn/184930/1 "2025-11-13T20:01:07Z")
Howdy! We have an Omtech Pro 3655H Trocen controller Firmware is 2.24.12.3 Using Lightburn Pro 2.0.04, I made a design for a rubber stamp. In lighburn the cut shape lines up with the fill shape, but when we send it to the laser it displays as being offset, and when the laser does the cuts it does cut the way it shows in the display on the Omtech laser and not how it looks in lightburn. We have a Trocen controller, not ruida. ![image](https://forum.lightburnsoftware.com/uploads/default/original/3X/b/6/b62bf5010d717b35796bab3e0bf86bdfb38234c6.png) ![omtech1](https://forum.lightburnsoftware.com/uploads/default/original/3X/2/a/2adbc2f481fbf3ce52e97c7617350637cba6aed9.jpeg) If you zoom in on that second pic you can see the outline of the cut is not centered on the red fill. This happens when I create the cut line with the rectangle tool in lightburn or by creating an offset shape. If I turn on “bi directional fill” then the offset goes away, however, then the text in the middle, which is kinda the point of the whole thing, is all messed up. You can see that in the pic below. ![omtech2](https://forum.lightburnsoftware.com/uploads/default/original/3X/c/4/c41361bff9678a1b24cf2fc5820558f169f259eb.jpeg) Any ideas? Thanks! -Mike ---
**Author:** ![thelmuth](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/thelmuth/32/73307_2.png) [@thelmuth](https://forum.lightburnsoftware.com/u/thelmuth)\ **Post date:** [November 13, 2025, 8:17pm UTC](https://forum.lightburnsoftware.com/t/omtech-displays-and-cuts-different-than-whats-in-lightburn/184930/2 "2025-11-13T20:17:46Z")
First, what does the Lightburn preview show? Second, post a screenshot of the cut settings editor screens. ---
**Author:** ![soniclab](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/soniclab/32/67657_2.png) [@soniclab](https://forum.lightburnsoftware.com/u/soniclab)\ **Post date:** [November 13, 2025, 8:18pm UTC](https://forum.lightburnsoftware.com/t/omtech-displays-and-cuts-different-than-whats-in-lightburn/184930/3 "2025-11-13T20:18:46Z")
> [@Mike\_at\_launchpad](#): > > is all messed up. You can see that in the pic It looks messed up in the controller interface, but how does it look in LightBurn in the preview? (alt+p) ---
**Author:** ![Mike\_at\_launchpad](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/m/76d3ee/32.png) [@Mike\_at\_launchpad](https://forum.lightburnsoftware.com/u/Mike_at_launchpad)\ **Post date:** [November 13, 2025, 8:38pm UTC](https://forum.lightburnsoftware.com/t/omtech-displays-and-cuts-different-than-whats-in-lightburn/184930/4 "2025-11-13T20:38:12Z")
![cut settings editor 1](https://forum.lightburnsoftware.com/uploads/default/original/3X/2/d/2d1bb4c0ce474e202c08d214825f4deeda92b02b.png) ![cut settings editor 2](https://forum.lightburnsoftware.com/uploads/default/original/3X/b/1/b1d5e7e32f95629dce1e1e4ecabb42f844045319.png) ![cut settings editor 3](https://forum.lightburnsoftware.com/uploads/default/original/3X/d/6/d6509e8349e00ce111710bb0d7427a5937e68ce8.png) ![cut settings editor 4](https://forum.lightburnsoftware.com/uploads/default/original/3X/7/2/7229fd79cb5efc2ab2daac37c7327a1c9f5dc56d.png) ---
**Author:** ![Mike\_at\_launchpad](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/m/76d3ee/32.png) [@Mike\_at\_launchpad](https://forum.lightburnsoftware.com/u/Mike_at_launchpad)\ **Post date:** [November 13, 2025, 8:39pm UTC](https://forum.lightburnsoftware.com/t/omtech-displays-and-cuts-different-than-whats-in-lightburn/184930/5 "2025-11-13T20:39:42Z")
this is the preview with bi directional fill turned off. ![preview without bidirectional](https://forum.lightburnsoftware.com/uploads/default/original/3X/2/4/24dfae28ed65ef4241d502ba5f510e398f7be0b0.png) ---
**Author:** ![Mike\_at\_launchpad](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/m/76d3ee/32.png) [@Mike\_at\_launchpad](https://forum.lightburnsoftware.com/u/Mike_at_launchpad)\ **Post date:** [November 13, 2025, 8:40pm UTC](https://forum.lightburnsoftware.com/t/omtech-displays-and-cuts-different-than-whats-in-lightburn/184930/6 "2025-11-13T20:40:51Z")
this is the preview with bi directional fill turned on it looks good in lightburn, but not on the controller display. ![preview with bidirectional](https://forum.lightburnsoftware.com/uploads/default/original/3X/3/e/3ed2de1e1e6d2ff26e63579b6e15b349d4fa0bfc.png) ---
**Author:** ![soniclab](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/soniclab/32/67657_2.png) [@soniclab](https://forum.lightburnsoftware.com/u/soniclab)\ **Post date:** [November 13, 2025, 8:56pm UTC](https://forum.lightburnsoftware.com/t/omtech-displays-and-cuts-different-than-whats-in-lightburn/184930/7 "2025-11-13T20:56:47Z")
Set the Ramp to 0 and see how that looks. 1.25mm ramp is pretty extreme. I am not sure it’s necessary here. ![image](https://forum.lightburnsoftware.com/uploads/default/original/3X/6/0/6045a96ac21d246e5604f7d3de20d64420cdfc70.png) I suppose that might depend on how soft your rubber is but I have never needed a ramp for stamps that I’ve made, your results may vary ---
**Author:** ![Mike\_at\_launchpad](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/m/76d3ee/32.png) [@Mike\_at\_launchpad](https://forum.lightburnsoftware.com/u/Mike_at_launchpad)\ **Post date:** [November 13, 2025, 9:11pm UTC](https://forum.lightburnsoftware.com/t/omtech-displays-and-cuts-different-than-whats-in-lightburn/184930/8 "2025-11-13T21:11:50Z")
I set the ramp to zero and it made no difference. With Bi Directional Fill turned on the text was all messed up, but the offset problem was fixed. With Bi Directional Fill turned off the text was perfect but the offset was back. ---
**Author:** ![soniclab](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/soniclab/32/67657_2.png) [@soniclab](https://forum.lightburnsoftware.com/u/soniclab)\ **Post date:** [November 13, 2025, 9:13pm UTC](https://forum.lightburnsoftware.com/t/omtech-displays-and-cuts-different-than-whats-in-lightburn/184930/9 "2025-11-13T21:13:10Z")
OK, so have you tried an engraving to see how it looks? ---
**Author:** ![Mike\_at\_launchpad](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/m/76d3ee/32.png) [@Mike\_at\_launchpad](https://forum.lightburnsoftware.com/u/Mike_at_launchpad)\ **Post date:** [November 13, 2025, 9:20pm UTC](https://forum.lightburnsoftware.com/t/omtech-displays-and-cuts-different-than-whats-in-lightburn/184930/10 "2025-11-13T21:20:30Z")
Yes. I noticed the problem only when I added the line cut. I was doing an series of incremental tests on a sheet or rubber to see what settings we needed to do to make the stamp a nice depth. When I got what I thought was a good depth of cut, I added the line cut to cut it out so we could try it out. Previously I’d just cut them out with an x-acto. If I have it cut and engrave now, it either engraves the stamp perfectly but cuts the stamp wrong, because of the offset, or the cut is good but the stamp itself gets all messed up from the bi-directional fill. I am unable to get a good photo of the messed up ness on my phone, but it makes a kind of duplication or ghost where we get two images. This ghosting goes away as soon as we turn bi directional fill off, so I don’t think it is caused by mirror misalignment or a dirty lens. ---
**Author:** ![soniclab](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/soniclab/32/67657_2.png) [@soniclab](https://forum.lightburnsoftware.com/u/soniclab)\ **Post date:** [November 13, 2025, 9:25pm UTC](https://forum.lightburnsoftware.com/t/omtech-displays-and-cuts-different-than-whats-in-lightburn/184930/11 "2025-11-13T21:25:09Z")
> [@Mike\_at\_launchpad](#): > > duplication or ghost where we get two images Can you show us the results of your tests in the rubber so we can see? ---
**Author:** ![Mike\_at\_launchpad](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/m/76d3ee/32.png) [@Mike\_at\_launchpad](https://forum.lightburnsoftware.com/u/Mike_at_launchpad)\ **Post date:** [November 14, 2025, 3:11pm UTC](https://forum.lightburnsoftware.com/t/omtech-displays-and-cuts-different-than-whats-in-lightburn/184930/12 "2025-11-14T15:11:42Z")
Yes! I couldn’t get a good picture of the name stamp. Kept being too blurry or too hard to see what was going on, so I used a drawing of a snail one of the kids wanted to make into a stamp. The right snail is without bi-directional fill. The left snail is with bi-directional fill turned on. ![IMG_5953](https://forum.lightburnsoftware.com/uploads/default/original/3X/8/f/8f5d1002d968fc1589c13f4fdeaece94251ccb64.jpeg) ---
**Author:** ![ednisley](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/ednisley/32/40455_2.png) [@ednisley](https://forum.lightburnsoftware.com/u/ednisley)\ **Post date:** [November 14, 2025, 3:43pm UTC](https://forum.lightburnsoftware.com/t/omtech-displays-and-cuts-different-than-whats-in-lightburn/184930/13 "2025-11-14T15:43:19Z")
> [@Mike\_at\_launchpad](#): > > with bi-directional fill turned on @soniclab: This looks ominously like a recent unresolved problem with a different controller: > [@Double image when engraving with Bi-directional scanning](https://forum.lightburnsoftware.com/t/double-image-when-engraving-with-bi-directional-scanning/184746): > > I just got a brand new 1610 CO2 laser and attempted to engrave for the first time. My engraved text came out double with about 10 mm offset. It cuts OK, this only happens when I am engraving with bi-directional scanning enabled. When disabled it engraves OK, but it takes twice as much time. It happens when engraving in X-swing and Y-swing as well. I read in the forum that one user had the same problem and solved it when tightened the belts. But my belts seem fine and not loose. Also it happens … The two problems are similar enough to suggest something is awry with how LightBurn is now doing things, not with the machines or their settings. The offsets are too large for `Offset Fill Adjustment` and apparently not mechanical. ---
**Author:** ![LightBurn](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/lightburn/32/75577_2.png) [@LightBurn](https://forum.lightburnsoftware.com/u/LightBurn)\ **Post date:** [November 14, 2025, 3:52pm UTC](https://forum.lightburnsoftware.com/t/omtech-displays-and-cuts-different-than-whats-in-lightburn/184930/14 "2025-11-14T15:52:07Z")
Scanning offsets are not applied when previewing in LightBurn, only when sent to the laser, and will affect the preview there. When using bidirectional, the offsets are applied in both directions, and when using unidirectional they’re only applied to one side. In other words, your preview looks exactly as it’s supposed to, but your scanning offsets are likely incorrect. They should not be nearly that large. I noticed that you have your edit window in inches. One thing that I’ve seen often is that companies often supply scanning offset values with machines, in millimeters, and then users enter them in inches, effectively making them 25.4x larger than they should be. There’s even a warning in the box you use to enter the values: ![image](https://forum.lightburnsoftware.com/uploads/default/original/3X/f/a/fadd8a4f69a7f340a72729a959b620fcedda4458.png) Is that what happened here? ---
**Author:** ![Mike\_at\_launchpad](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/m/76d3ee/32.png) [@Mike\_at\_launchpad](https://forum.lightburnsoftware.com/u/Mike_at_launchpad)\ **Post date:** [November 17, 2025, 3:09pm UTC](https://forum.lightburnsoftware.com/t/omtech-displays-and-cuts-different-than-whats-in-lightburn/184930/15 "2025-11-17T15:09:36Z")
I wasn’t able to work on it over the weekend, but i spoke to one of the people here that did, and here what they did that worked: 1. remove the device from Lightburn, close Lightburn, open it back up and reinstall the device. That got rid of all the various settings that folks did, who knows what someone fat-fingered in there incorrectly. 2. Printed out 50x10mm rectangles at various speeds, 50mm/s through 900mm/s, measured the offset, divided it in two, and set that in the device settings. Repeat until the offset was unmeasurable. It now seems to be cutting and engraving correctly, uni-directionally or bi-directionally. Thanks for everyone’s help! ---
**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:** [December 17, 2025, 3:10pm UTC](https://forum.lightburnsoftware.com/t/omtech-displays-and-cuts-different-than-whats-in-lightburn/184930/16 "2025-12-17T15:10:08Z")
Closed on December 17, 2025, 3:10pm UTC This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.