Beam spit during beam alignment?

I was having troubles cutting through 1/4” baltic birch so I went through the procedure of cleaning all mirrors. Then I decide to check the beam alignment. I went through the steps of using painters tape on each mirror. The picture below is between mirrors 1 and 2. I did one pulse and the dot on the tape looked like it doubled or split (see picture below). Is this normal? Is there a way to correct this?

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Please check your beam combiner for any signs of damage.

You can submit a ticket with your issue on ZOHO, and our customer service team and engineers will be able to more accurately diagnose your problem.

The link to submit a ticket is: https://zohodesk.1laser.com/portal/en/newticket

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This should be a secondary light spot. If you also find that the power is decreasing through processing or power meter detection at the same time, then there is a problem with the laser tube. You can contact customer service for after-sales service.

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However, if you do not find such a problem between the laser tube and the mirror 1, but discover it between the mirrors 1 and 2, then it should be that the position of the mirror 1 is not adjusted properly, resulting in poor beam focusing. Adjusting the optical path does indeed require a lot of patience. Hope my answer is helpful to you.

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Thanks for your reply.

The bracket holding mirror one was not parallel to the laser so I adjusted that and realigned all the mirrors so they hit the center.

The dot before the combiner looks good. (See picture). But the dot mirror 2 is still doubled.

Also I find the engraving on the top of the bed is darker than the bottom.

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Thanks for the reply. I have a ticket now and trying to correct it. It does seem to be after it goes through the beam combiner.

Update. I decided to try a tape test between the end of the laser and the housing of mirror 1 to see if the problem is from the laser source.

I tested this twice and the spot on the tape has what looks like a tail on the right side of the dot.

My ticket is still ongoing I guess they don’t work weekends. I hope to hear back from them tomorrow.

Just to wrap up this post for others. It was found that the problems were due to abnormal aging of the RF tube. They are sending me a new one.

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