Hello everyone, I have been lurking for a long time now but I now

Lasers
,
1

Hello everyone,

I have been lurking for a long time now but I now need your help.

So I have a K40 machine with a Smoothieboard mod (K40 middleman board + logic level converter), it has been working well for almost six months, cutting through 5mm plywood at 2.7mm/s 80%, but now I can’t cut through it even at 100% and 1mm/s…

I’ve checked the mirror and they are perfectly aligned, I’ve cleaned them too, with no luck.

Laser is working but I don’t have a power probe so I can’t check the real power.

I have tried a calibration pattern (cutting squares at speed from 1mm/s to 10mm/s and power from 10% to 100%) but none cut through the wood.

What can I do to find the problem ?

Thank you

2

mirrors and focal lenes wear out without any noticeable damage showing,measure cut width

3

Where in the world are you located?

4

Check focal point has not shifted too. Do a ramp test. Lens orientation correct after cleaning?

5

lasertube wear too. it’s a good chance if your optic is ok, your electronic should be ok, but the gaz in your tube.
full power reduce tube life exponentially.