I have the following problem:
- I made the same laser engraving 4x times over the last 2 weeks
- In the image below, the first engraving is at the top left, second top right, third bottom right, and fourth bottom left (so basically going clockwise)
- You can clearly see the laser marks are getting weaker with each engraving and various image details are becoming blurrier
Some further details:
I am using the same file prepared with Luban
Settings were Dot mode, Density 7 dots/mm, Work speed 1500 mm/min, Dwell time 5 ms/dot, Laser power 100%
I am using birch plywood, same batch from the hardware store for all four engravings
Each engraving takes around 50h to complete (quite long, I know…)
I started the jobs with around 1 day in between
I dusted off the laser head after each job, primarily to get rid of the fine wood dust created during the engraving process
I have been using the laser for quite a while now, I completed some 30 engraving jobs of this type
Thinking back of some older engravings (which I have already given as gifts), I believe this issue is not new; I think some older engravings also suffered from blurrier details
So why is this happening?
Is it “normal” for the laser power to decrease in this way?
Could the fine dust be affecting laser power somehow?
Am I missing something here?
And most importantly, what should I do about it?
Many thanks in advance for any thoughts and suggestions!