I recently got an Ortur Master 20w with the goal of cutting small thin pieces of wood.
When I try to focus down to a dot in order to cut, it turns out that I can narrow the X dimension but not the Y dimension. Here is a test cut where I tweaked the focus every time.
I went back and forth with Ortur and this is what they told me: “This kind of higher power Laser diode is bar-shape, so, when focused well, the laser spot is a 0.5x1mm rectangle.”
This seems way too large for a laser spot. Is this normal for a diode laser?
Just as a comparison, here are two things I made using the Ortur and a local Maker Space CO2 laser.