Possible power drop reasons:

[mrsunnylam]

1.) Over-driving the laser tube is one of the most common issues a lot of customers are not aware of because most of the laser machines in the market do not have one installed. The percentage output on the controller software does not tell us if the laser tube is being over-driven or not. It has to use a current meter to check and keep the current running on the tube lower than the max current indicates on the tube description/specification page.

2.) Alignment- Check for alignment issue.
Here is the link for step by step alignment guide: viewtopic.php?f=16&t=2835

NOTE: A lot of customers forget to align the laser head, which is one of the most important steps to do on the alignment process. Utilize the 3 set screws on top of the laser head to align the beam and make sure laser beam is firing without hitting the tip of the laser head. Here is a simple test to test if the laser beam is hitting the laser tip. You will use the laser to cut for a few seconds and use your hand to touch the laser tip to feel if it is hot. (Be very cautious when you doing that, the laser output has to be off when try to touch the laser tip) If you feel hot by touching the tip of the laser head when the laser beam is right off, the alignment on the laser head part needs to be redone.

3.) Degraded lens and mirrors. Check them if there are any coating that came off or if you see any ware marks on it. If so, it is time to replace. Clean the dust if needed. Double check the mirrors, combiner lens (normally used with red dot pointer), and focus lens to make sure that they are secured in places. If they are not fastened enough, it will cause a drop on cutting speed.

4.) Check the current running on the laser tube. For an 80W tube, the max current should not exceed is 26mA for a longer life span. Typically, the tube will output 80W at 20mA.

5.) Put the material on the right focus point when cutting.

6.) Make sure to turn on an air pump when cutting. The stronger PSI pump, the better the cut will be, recommend 20-30 PSI pump for cutting. If the air pump is stronger than 30PSI, it may pop the tubing. Try and find out what the best PSI pump you can be used in your machine.