Thanks for posting on the Community site!
First of all you should not have to clean the Prisms under normal use and the only ‘realignment’ should be positioning the Lens Housing correctly in the Laser Unit, and is only necessary if you have removed/repositioned the Lens Housing.
The Prisms themselves should not be realigned or altered in any way and you should never touch the Diode (Collimation) Lens.
Cleaning the Focus Lens should be done weekly, by following the instructions in the Lens Cleaning Wizard from within LightBurn from the menu bar: Emblaser > Maintenance > Start Lens Clean (Gen2). As you have a rev. 2 machine, you should choose the (much simpler) Gen2 wizard.
The most important things to check are as follows:
- Focus Lens is clean
- Focus Calibration has been performed
- Material and Support values are accurate
- Material is flat
Regarding cutting, as Jeremy’s indicated ‘Laser Ply’ often refers to the glues 1, not excessive and 2, being safe for laser cutting. This does not mean they will all cut with the Generic Ply settings.
With laser cutting, you are trying to minimise the amount of heat transferred to the material, to reduce burning while cutting is performed by vaporising the material. This means there is a balance of speed at 100% power, that will provide the fastest cut time while minimising burning and surface marking on the material. 100mm/min is the slowest I’d recommend for this (generally 180-200mm/min).
I’d say you have fairly good settings overall. You may find that a Z Offset of 0.0mm, with a Z Step Per Pass of 0.6mm may be slightly better, but this would be minimal if noticeable at all.
Trying a lighter weight ply such as a Poplar Ply will allow you to cut quicker.
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