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Optimize Your Engravings: ULS Laser Optics and Alignment Guide

ULS machines work by using a UV beam from the laser tube that travels through various optics before reaching your engraving surface. If the laser performance is poor, it could be due to issues with these optics.

Before we begin, it’s important to have the proper tools, including your ULS lens cleaning liquid and ULS cotton swabs. If you don’t have the ULS cotton swabs, a clean microfiber cloth can also be used. But avoid using normal cue tips or anything similar as they can leave residue and damage the optics over time.

We’ll start by examining the basic optics of the machine. The first one we’ll check is the beam window, located in the back left corner of the ULS bed. This connects directly to the laser firing tube and is the first place to check for issues. Clean the glass of the window gently with the lens cleaner, and check for scratches or cracks that could affect the laser performance.

Next, we’ll look at the #2 mirror located under a cover on the X arm. Remove the thumbscrew and gently push the cover to the right towards the X arm to reveal the mirror. Clean the mirror surface with the lens cleaner and check for any signs of wear.

Moving on to the #3 mirror and focus lens, located on the carriage and held by three thumb screws. After removing the screws, gently clean both sides of the lens and mirror while checking for wear.

The laser beam should be bouncing through all the lens and mirrors until it is focused on your material. Sometimes, the beam can get out of alignment for various reasons. Let’s do a basic alignment test to make sure everything is in place.

First, turn on the red dot pointer from the laser tube using the Universal Control Panel’s Alignment tab in the settings window. Check that the red laser pointer is coming from the beam window into the #2 mirror. You should be able to see it hitting the mirror with the naked eye.

If it’s hitting the #2 mirror properly, move the carriage to the bottom left corner of the machine and place a piece of masking tape over the carriage beam hole. The red dot should be visible near the middle of the hole, it doesn’t need to be perfect but it should be relatively even through all corners of the machine. Repeat this process for the other 3 corners. A slight movement in the red-dot’s position is okay as long as the machine is consistently hitting the #3 mirror.

In conclusion, proper maintenance and care of your ULS machine’s optics is essential for optimal laser performance. By following the steps outlined in this guide, you can identify and fix simple problems with your laser optics. However, if these troubleshooting steps don’t solve the issue, it’s best to seek the help of a professional to avoid causing further damage to your machine. Remember, a little bit of preventative

maintenance goes a long way in keeping your ULS machine running smoothly and producing high-quality results.


Sometimes, you may encounter problems with your laser engraver that require professional help. That’s where our team at H2I Group comes into play. Equipped with a wealth of knowledge and experience, our laser experts are at your disposal to address and resolve any complications that might arise with your engraving equipment. We understand the intricacies of ULS systems and are committed to ensuring your operations run smoothly. Contact us here to submit a service request. 

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