Help with changing the laser module board, Sculpfun S9

Guys. I’ve been using the Sculpfun S9 for a year. But it stopped working because the module board suffered heavy oxidation and I needed to replace it.

I was told that the LUNYEE 5.5W module board could serve as a replacement for the original Sculpfun S9 board.

But I’m having trouble getting it to work after soldering the cables. When I turn on the machine, the laser flashes every 3 seconds without stopping.

Next, an image of the new board with the cables already in place and an image of the new board according to the specifications in the advertisement:


Maybe they were wrong?


The boards look a bit different, if it’s a good replacement, it should work, but I’d expect it to be similar.

I don’t know where to tell you to start debugging these, as they are usually not user serviceable… If mine failed, I’d try it to, but generally you run into difficulties.

I know how most of these work, generally, but am clueless as to what LD +/- actually mean. Most LED modules have ground, supply voltage and pwm.

I assume there is another board in the body somewhere?

Maybe @misken can advise you with a more up to date response..

:smiley_cat:

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After a few attempts, I finally found the solution.

I’ll explain it here in case anyone else has the same problem.

As I said in the first post, my module’s drive board basically died.

I couldn’t find an original Sculpfun S9, BUT the LUNYEE board (I found it by the title: 5.5W 12V Laser Driver 5V PWM for Laser Engraving Cutting Head Laser Module Engraver Wood Working Tools Accessories) worked for me as a replacement.
At first I thought it was a compatibility issue, but my mistake was the order of the wires.
Here is the position of the cables:

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Why would this ever happen? Did you laser objects containing PVC like vinyl? I’ve never seen any other method to get the boards look like that.

Apart from this, glad that you solved it, I will include your instructions in th diode laser wiki to get it preserved.

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From what I’ve gathered, it has everything to do with the material I work with (synthetic leather, PVC and polyurethane).
My machine basically only engraves synthetic leather and occasionally cuts sheets of wood up to 4mm thick.

The problem is the steam that comes out of the material. I didn’t imagine that I would need to clean the laser module every two days. After a few weeks of work, the result was oxidation and corrosion on the module.

Look at this!

The condition of this drive board was much worse than that. Unfortunately I forgot to take a picture before washing it.

You should NEVER EVER laser anything that contains PVC!!! It’s the number one rule of lasering! It’s not only highly corrosive, it’s EXTREMELY TOXIC!

This is like intentionally killing the laser (and your lungs, as well as the lungs of any family members or animals around).

Don’t do that!

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WOW! I didn’t know that. Thanks for the heads up!

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Unless noted as laser safe, vinyl produces chlorine gas when cut, this bonds with any moisture and ends up being hydrocholric acid.

I will mention that it’s not good for your machine or lungs.


As an example, a > $20k laser, after 6 months of vinyl cutting.

:smiley_cat:

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