Lower left side not as "good"

[Gary Gilbert]

I've noticed that towards the bottom, Laser Mag (for example) doesn't get through as much. I'm assuming there is some beam divergence or something?

Any thoughts - I bougth a used laser.

Thanks,

Gary

[Joe Pelonio]

Where's your tube firing from? On mine it's lower left so that's the closest and most effective area engraved. The worst would be lower right, where the beam has to go all the way fron to back, left to right, then back to front.
Still, with a good tube, clean, good lenses and all adjustments correct the difference is not normally noticeable.

[Gary Gilbert]

Tube is on upper right - that would be the longest path . . .

[Lee DeRaud]

And on my ULS VL200, I get (slightly) better cutting at the front-right, which is maximum beam-travel distance from the tube. Go figure.

"Better" here is defined as "less power required to vector-cut through material X". I should probably make some measurements to see if the "kerf" is wider/narrower at the various positions. I've never noticed any difference rastering.