Originally Posted by
Jacob John
The crazy thing is, my engravings/markings are GREAT until I get to a certain size then it gets bowed and distorted.
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Well, that being said, that could very easily be the lens. Think about what that type of lens does. It takes a fixed beam area and projects it at triangular locations. The lens has to be ground to flatten the image back out to compensate for the difference in the angular projection. For the sake of simplicity and me not having to do math, let's say that the distance from the center of the lens to the table, when in focus, is 12.000". Now, step out 3 inches in X and Y. Now that 12.000 dimension is 13.000 (or whatever the math works out to be). On a normal laser, that outer edge would be out of focus by 1" now. However, the lens is ground to flatten that out and make the outer edges in focus, even though they are further away. The further you get from center on those lenses, the more distortion you will see.
That's my opinion. Will will definitely see bowing when you get to the extremes of what your lens can handle.