Need to find new gold mirrors for my Universal laser

[Gabe Gat]

ULS-P50
50W. Laser

I'm in need of new mirrors for my laser, both the mirrors are pretty much worn and flaked away around the outter edges, where's the most econimical place to find them? It's a pretty old machine, maybe there's somewhere to get used ones?
Any advice would be great.

[Kevin Gregerson]

ULS-P50
50W. Laser

I'm in need of new mirrors for my laser, both the mirrors are pretty much worn and flaked away around the outter edges, where's the most econimical place to find them? It's a pretty old machine, maybe there's somewhere to get used ones?
Any advice would be great.

I really recommend you stay away from used as they will no longer have the coating on them that helps reflective on the laser. I've seen people lose 10%-20% power through a mirror that had been cleaned so much the coat was removed.

The mirrors alone are 75 each plus ship from any ULS channel partner, dealer or direct from universal and its an in-stock item.

620-0001-00-A is the part number.

[Dan Hintz]

I'm in need of new mirrors for my laser, both the mirrors are pretty much worn and flaked away around the outter edges

If it's just the edges, there's no reason to not continue using them...

[Kevin Gregerson]

If it's just the edges, there's no reason to not continue using them...

In my experience, if the edges are flaking then most of the reflective coating has already been removed and the power loss rather than being 20% is closer to 50-75%. One guy I worked with ordered a laser and everything else but the optics to get micro improvements. Once the optics were replaced, max cut depth went from struggling .25 to easily doing .5 inches.

Really, clean new optics make a difference. The 50 watts should be able to do half inch acrylic cuts. Older 50 watt more like 3/8s easy and .5 tuned well.

[Dan Hintz]

In my experience, if the edges are flaking then most of the reflective coating has already been removed and the power loss rather than being 20% is closer to 50-75%.

You do realize how insane those numbers are, right Kevin? At those kind of losses, the mirror would bake itself in a few minutes of use. It's like the local oil change guys who tell me I'm losing 10% of my power due to an old air filter, another 10% for old oil, etc. By the time they're finished, my car would supposedly gain back 50% of its stock horsepower if I just let them change everything. It's amazing the car even made it to the shop, if I listen to them.

Flaking edges mean the optic may have been roughly handled while putting it in the holder, moisture may have become trapped along the edges, etc. But none of that necessarily effects the center portion that carries the main load. I'm a big proponent of taking care of your optics properly and keeping them clean in the first place, but in many cases there's little need for wholesale swap.

[Mike Lysov]

You can measure your mirrors and find the same on ebay or alliexpress. Just make sure that you are buying the same specs mirrors as the ones you are using in Universal. I would check with sellers mirror thickness and diameter to make sure they match with your current mirrors.
From the other hand their exact size and thickness may not be relevant at all if they are supposed to be glued and do not sit in some mirror holders.

[Bill George]

You can measure your mirrors and find the same on ebay or alliexpress. Just make sure that you are buying the same specs mirrors as the ones you are using in Universal. I would check with sellers mirror thickness and diameter to make sure they match with your current mirrors.
From the other hand their exact size and thickness may not be relevant at all if they are supposed to be glued and do not sit in some mirror holders.

Lightobject dot com has replacement mirrors. Measure and replace that way you will know, save the old for spares . Most digital if not all digital calipers have Metric readout available.

[Gabe Gat]

mirror1.jpgmirror2.jpgThanks for all the replies, here are the mirrors in question. Would I be power loss based on this wear? It's a pretty old tube so I'm not getting near 50w in the first place. I assume based on the conversations here I can just find a cheapish .75" x 1/8" mirror, pop these ones off the bracket, re-glue on be on my way?

[George M. Perzel]

Hi gang;
I am curious-who out there is cleanly cutting 1/2" acrylic in one pass with 50 watts Co2 laser?
Best Regards,
George
Laserarts

[Scott Shepherd]

Hi gang;
I am curious-who out there is cleanly cutting 1/2" acrylic in one pass with 50 watts Co2 laser?
Best Regards,
George
Laserarts

In the past, when all we had was 45w, I cut a lot of 1/2" clear acrylic. Not in a hurry, but I cut it.

[Gabe Gat]

Hi gang;
I am curious-who out there is cleanly cutting 1/2" acrylic in one pass with 50 watts Co2 laser?
Best Regards,
George
Laserarts

I used to be able to get a clean cut through .5" acrylic no problem with my 50W.

[Dave Sheldrake]

Hiya George,

It's the difference between RF and DC excited tubes brother An RF unit will punch at *roughly* twice the DC weight

cheers

Dave

[Paul Phillips]

Would I be power loss based on this wear?

Gabe, you might not get 50% back but based on those pictures I would say it couldn't hurt to go ahead and replace them!

[Gary Hair]

George,
Believe it or not, I have cut 1/2" acrylic in one pass with my 30 watt laser. Granted, it was at 100% power and 1% speed - nothing I'd ever do for money, it took ffffoooorrrrreeeevvvveeeeerrrr, but it did it none the less.

[Dan Hintz]

mirror1.jpgmirror2.jpgThanks for all the replies, here are the mirrors in question. Would I be power loss based on this wear? It's a pretty old tube so I'm not getting near 50w in the first place. I assume based on the conversations here I can just find a cheapish .75" x 1/8" mirror, pop these ones off the bracket, re-glue on be on my way?

Those are hardly worn "at the outer edges"... those things are entirely trashed. I wouldn't even fire the beam against those. Replace immediately.