PLS HELP - Thickness material error

Hi, I’m trying to cut paper and it’s saying
“the materials is too think” which is not possible as it’s paper!

I reset the machine many times, clean it. hoover it inside, clean the lenses with a cloth. it’s been like this since last night. I set the auto focus, I pretend to change the material so at least it cut, nothing. same error over and over again.
I don’t know what else to do. Pls help me! What else should I try



You might try placing the paper on top of a piece of scrap wood. Use the set focus tool and your regular settings for paper.

instead of the tray you mean? it was working all fine until yesterday night, and since then I can’t make it work. nothing changed

it might be something common. We’re not sure yet:

I was one of the first to report these problems. I use some very thing material also. What I have found works for me is using a medium acrylic to add height to the tray and then adjusting my settings. I just turn them down to engrave and cut because the first couple of times it almost caught fire due to the height increase. It will work this way. At least you’ll be able to use the laser by doing this. Give it a try and let us know if you’d be so kind as to what the results were.

Please @corkhats, don’t tell people to stack materials on acrylic. The fact that it has worked for you up to this point without setting your machine on fire is more due to luck than anything else I’m afraid.

Stacking materials voids your warranty. It’s unsafe to do, and by telling other people to do it, you run the risk of being removed from the forum. Or worse, causing someone else to set their machine on fire.

I’m sure you don’t want to be responsible for that. :slightly_smiling_face:


Well, I wouldnt want them to catch on fire, that’s for sure. I dont know what else to say then. That’s what worked for me. Other than that I’d be stuck with a machine that didnt work at all. I can imagine some people rely on their machine for revenue so I’ll leave it at that.

Hopefully they’ll find it quickly. I know you were one of the first to catch it.

I do have a suggestion for you though…instead of putting the acrylic under it, use a sheet of glass. Glass is impervious to lasers and it should elevate the veneer to about the same height.

Might be a lot less chance of a fire in your machine too.

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Yeah, that could work also. I dont believe it’s the acrylic specifically making it work just the elevation in height.

so last night, it cut a sheet of plywood on the tray but now when I put the tray back and I put paper on a very little magnets on top (I’ve been doing this always and never had a issue) keeps saying again and again that the materials is too thick. IT’S PAPER! I don’t know what else to do.
I did try to put the paper over a sheet of plywood but it didn’t cut the paper? maybe it’s too far away. I’m slight scared to use the machine without the tray to be honest. It’s clearly something that is not reading clearly the height inside…WHAT CAN I DO, it’s day two that I can’t use it

Over a piece of wood is not even cutting the paper…

The announcement made by Glowforge today should address your issue. As you noted, you have been successfully cutting paper and something changed. You should not have to remove the tray.

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Ahah! It’s black paper. Dark colored materials will frequently cause a misreading of the height because the little red dot the laser fires cannot be seen by the camera.

You can either hard code the height information to override the automatic focus, or put white masking on top of the black paper at the spot where you use Set Focus, then put the correct height into the individual thumbnail operation.

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hi there, it was happening with white paper as well.

now it’s magically fixed? clearly it was something from HQ because everything I tried failed. Anyway thanks for all the help


So glad all is well. Carry on.

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I’m glad you resolved it! I’m going to close this thread. If you run into any other trouble, please start a new topic, or email us at We’re here to help!