Help needed cutting acrylic

[Gone Cruising]

Hi!!!

I was wondering if anyone has ran into this issue when cutting acrylic.

I have a Rabbit 80w C02 and when I cut acrylic the cuts are perfect 90 degrees straight through on all sides except for the left side.

I spent hours today aligning the mirrors to perfection, the beam spits out of the cone dead center.

It's the left side cut that always ends up angling outwards about a millimeter, like the beam cut's it at an angel.

Any help would be appreciated!!!

[Sea_en_see]

I would check the beam to make sure it is centered coming through the objective lens. Also make sure your acrylic is flat, and supported so it doesn't move when cutting. Is the left side the last cut before the part is loose?

[Gone Cruising]

Hi, thanks for you reply!

I checked to see if the beam comes out of the laser cone by putting a piece of tape over it and it's dead center of the circle impression on the tape.

The front cut is usually the last and the left is usually the first cut.

[Sea_en_see]

That is how I check our beams through the objective. How thick is the acrylic? Is it possible to reverse the cuts? Cut the front first, and the left side last? The point would be to see if the problem stays with the first cut, or if it stays on the left side. Also, have you tried to speed it up a bit? How many cutting heads are we talking about here? 80w should buzz through it easily, but I'm not sure if it's enough power to split and still cut.

[Gone Cruising]

Acryic is 1/8", 1/4" and 3/8" max. All have the same problem no matter what I cut.

One cutting beam, I used it at minimum of a speed of 6 and power of 60% and it cuts fine. Bumped it up to 90% power and it still cuts the left at an angle. Tried speeding it up and going twice over, still the same.

I export the cuts out of Corel Draw X4 so im not sure if I can choose where it starts.

I do know when I use complicated multiple cut pieces, no matter where it starts, ends, starts, the left edge is always at an angle. Even if the left side is not the first cut.

[zax15uk]

Check that the lens is perpendicular to the beam. If the lens isn't sitting flat in the folder or the 'head' isn't at 90 degrees to the gantry it could cause this.

If the beam path is longer when the left side is being cut this could explain your problem.

Zax.