Engraving is WAY off, someone please help

[happygreens7]

Title says it all. I think it has something to do with the crumb tray being out as I dont do much with it out. please advise.
thanks in advance.

[Jules]

Oh yes, you have to perform some special calculations if you take the crumb tray out. There are a couple of tutorials that explain how to do it here:

Tray Removed - Calculator - Updated

After seeing a couple of people talking about the correct way to do this I made a calculator to simplify the process and hopefully demonstrate the goal. All you need to do is add the height of your object and the base you want to use and it will tell you if it will work or not and the setting to use in the GF, if it won’t work it will tell you why. If you don’t have a base in mind just put 0 and it will give you the minimum needed. [image] Zip file TrayCalculator3.xlsx (33.8 KB) Dropbox in …

Cutting Without the Crumb Tray - The NO MATH Edition

There’s a great tutorial here on cutting without the crumb tray when you want to work with thicker material. If you want to know the numbers and theory behind it, go read that first, and then come back. Thank you, @henryhbk! This method uses the digital calipers you should already have, and the not-used-often-enough ZERO button. We’re going to go through the steps from the tutorial above, but without any math or writing down numbers. The first step is to find the height of your crumb tray’s su…

[happygreens7]

I had heard of having to do math but I thought that was just for height not side to side. Ill read them , thanks

[Jules]

The correct material surface height above the crumb tray has to be entered into the Unknown Materials slot for anything that is not Proofgrade. So that means you have to prop the top surface of the item into a small half inch range in order for the laser to be able to focus on it properly. The laser can’t focus on the bottom of the machine.

That value is used in a correction algorithm to compensate for the fisheye effect of the lid lens, so if that number is wrong, the side-to-side placement is affected. That’s what you’re seeing there.

[happygreens7]

Now that makes sense! I didnt even think about the fisheye. my head has now been pulled out of my butt. thanks again.

[Jules]

Happy to help!

[vee]

Thanks for the answer @jules, that’s right!

I’m going to close this thread - if you have any other questions, go ahead and post a new topic. Happy printing!