[wolfau]

Can anyone help me please? I need to know how to change the focus lense so I can do some tests with my laser cutter and see how it performs when engraving.

My model is an Lc 1290.

I have no idea why this information is not provided to the customer.

Thanks in Advance.

Joe

[Bec Weir]

Go to Rabbit Laser USA - FAQs and download their pdf on aligning the mirrors. In there it tells you how to remoce and replace a lens for cleaning.

[TechGraphix]

With a different focal length you need a different nozzle.
What i can see on the tiny pictures of your machine is that the head looks very similar to mine.
I suggest you try to buy a separate shaft + nozzle + lens.
I made a film how i changed and adjusted the autofocus on my machine, maybe this gives you an idea..
https://www.youtube.com/watch?v=EnaLNZPRrwo

Kees

[wolfau]

Big thanks for the replies.

After some minor damage to the laser nut I worked it out thanks to the link provided.

Joe