Rubber stamp with fused bumps in etched area

Community Laser Talk
1

Has anyone had this issue before. I’m etching a rubber stamp. The etched area looks like the rubber stamp sheet dust is re-fusing to the etched part. ( just a guess) See photo. The air is up as high as it can go. It doesn’t happen all the time, but enough to be a problem. To clarify, I’m not using the rubber stamps like a traditional rubber stamp. It probably would not be an issue but I need the etched part to be clean. Any help appreciated.
LightBurn Pro 2.0.03
Mac Studio
Speed 250
Max power 80
Min power 80
400 LPI
ThunderLaser Bolt

IMG_4866
IMG_48661920×2560 346 KB

IMG_4865
IMG_48651920×2560 263 KB

IMG_4869
IMG_48691920×2560 332 KB

2

I would guess 2 possibilities:

  1. Too much power.
  2. The material composition varies in density or chemical makeup.
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3

Is this a fill operation using ramp setttings?

Min/max power doesn’t matter on a fill/scan operation, the Ruida will ensure it’s up to speed before it reaches the engraving area.

80% power of a 100W machine is different than 80% power on a 40W machine, you’ve left us guessing here.

Is this an RF machine? You should be able to run 500mm/s without an issue with an RF source.

Do you know your spot size? You don’t want to cover the same area for multiple passes.

:smiley_cat:

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4

Is 400LPI a little too high for a CO2 machine?

5

Thanks I’ll try lowering the power. These need to be deep so constrained to the power that cuts deep enough. Thanks

6

Thanks sorry I’m still very new to this. according to the site, it’s a 30w RF Tube (comparable to a 60w glass tube)
I have a lot to learn. I have no idea what a spot size is. The settings are set to the crosshatch setting.

7

In one pass? Does your Lightburn permit multiple passes in the Cuts window?

8

Yes it does. But the cutting is fine. It is the etching that isn’t clean.

9

When I said “Cuts window”, I did not mean a cut power setting. I am talking about engraving settings in the Cut Settings Editor window.

I would lower the power to put less energy into the pass, just enough to remove some material. Then use multiple passes to get the desired depth. You destroy with a jackhammer, but carve with a chisel and hammer.

10

thanks for that clarification. I’ll give that try, your analogy makes sense.

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