Laser cutter beam length limitations

[shearder]

Hey guys

What is the effective beam length of a laser? I.e. if you have a cut length of 2000mm in X and 1000mm in Y plus beam that isnt over the cutting area, say 200mm, then you may have a beam.of 3200mm+ from laser to material.

What loss does one experience?

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[cinematic2]

Depends upon laser. RF excited has better beam quality than DC. Much better.

[TokinSpokane]

Any power loss would be insignificant to cause any problems with engraving or cutting.
Bed leveling across all four corners would be a more significant area to concentrate on if there are any inconsistencies.