# Apparently random glitches

**URL:** <https://forum.lightburnsoftware.com/t/apparently-random-glitches/177740>\
**Category:** OS Specific\
**Tags:** ruida, mac\
**Created:** [August 16, 2025, 6:33pm UTC](https://forum.lightburnsoftware.com/t/apparently-random-glitches/177740 "2025-08-16T18:33:42Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**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:** [August 17, 2025, 11:45am UTC](https://forum.lightburnsoftware.com/t/apparently-random-glitches/177740/6 "2025-08-17T11:45:22Z")

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> [@richblaker](#):
>
> 4 metre usb type A to type B

Very long cables tend to not work well, perhaps because typical USB cables from the usual sources aren’t the best quality.

Unless you’re using an active extender cable with power injected at the laser end, that’s the problem right there.

Some previous discussions cover what’s happening and maybe some solutions:

> [@USB Cable Issue](https://forum.lightburnsoftware.com/t/usb-cable-issue/171611/):
>
> I have just purchased a Gweike Cloud RF laser, using with Lightburn. The supplied USB cable works fine but it’s very short. So I bought a nice long one, 5 metres length. USB C to USB A, I use Macs. It’s a good quality cable, but I don’t seem to be able to make a connection when I plug in to the laser and to my Mac? Any suggestions/fixes most welcomed. I came across a really useful post by @BillieRuben who seems to have knowledge of these machines and setting up, any idea Billie ? tia blush

> [@Light Burn will not run the layered drawing I have Created in LightBurn - HELP](https://forum.lightburnsoftware.com/t/light-burn-will-not-run-the-layered-drawing-i-have-created-in-lightburn-help/126196/):
>
> Hello, I’m a nub to lasers and LightBurn but I have been a CAD operator for 40+ years so I the LightBurn program is not a foreign software to me. I have created a LightBurn drawing that i want to use to test my new laser and figure out power and speed for my laser. When i test my drawing by starting the PREVIEW command, the preview runs perfectly. But, when i send the send the START command to the laser, the laser starts by moving to the first object (a 1/2" diameter circle) to engrave/cut (li…

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