I never got to do any real work in NWT on my CO2, so now take 2 at this.
All the usual stuff - get expensive paint, spray tile, laser, see what comes out.
In my case i grabbed cheap white non-permanent grass marking spray paint from screwfix (for UK folks here, item number 121PC in screwfix), 7 quid for 750ml can is a good deal. One change needs done though - those cans are supposed to be sprayed upside down, so i stole the spray nozzle of of a regular rattle can i had laying about and sprayed the can upside down(blowing sideways), while tile was propped up at 90deg angle. Single layer, just eyeballed it, some runs etc, meh.
Used Nicks settings (that was for 60W mopa, mine is 100w but i just ran it as is):
100 mm/sec
30% power
1000 Khz
200 ns
423 DPI
Grabbed some random image on google, didn’t fiddle with it none and ran it. 100mm glossy white tile.
Results (a bit overcooked, tbh):
If you run with a 200nS pulse width and have your frequency set to 1kHz, then my machine (and Nickys) will limit power out as you’re below the threshold frequency.
Here is the limitations as specified in the manuals I have… 60W to the left, 80 to 100W to the right. I have underlined the 200nS pulse width.
It’s likely that Nickys’ machine is reducing power as it operates. It’s threshold at 200nS is 40kHz.
I have no clue as datasheet just states for legal purposes they have to disclose a code for 1-5% TiO2 presence. So i figured its in that region somewhere.
I didnt do much of a research into it this time, except to check if any Tio2 is present at all. Present TiO2 and cheap = experiment
I was thinking if this doesnt work out i’ll just get TiO2 powder. But, even while overcooked, i did get a very good black level i didnt expect to be honest…
I got the TiO2 powder from Amazon when I was doing this. There is also a very long thread on doing this.
Have you watched any of Russ Sadler videos on doing this? He doesn’t use a fiber but I think he does a good job on how it works. Most of his stuff is on co2 machines.
I think this was done with TiO2 mixture using the fiber…
