Looks like you are gaining on it…
Any idea of how to make my Y axes lines closer…? The red marks show a pair of scans… All of them are pairs…
It’s scanned bidirectionally… two scan near each other then a gap, two more lines and a gap… 330dpi
I’ve done some of the timing, but don’t know how to correct this one.
from what I saw on a youtube video you lower the interval. looks like 600 might be your number?
I also discovered that my MOPA ignores the tape and literally hit the metal under! So that tester flask is FUBAR.
I’m just going to engrave it without trying correction. Just throwing numbers at it isn’t working and it is quite frankly frustrating the hell out of me.
The problem is the gap between the pair.
I put down two line (red marks), they are next to each other… then there is a gap before the next scan line…
So I have two close and touching, then an empty looking line, then the next pair of scans…
I need a way to adjust the distance between each scan line. Since they are not equal, I’m not sure what to do…
Maybe I’ll post a photo on the Laser Everything board …
I will have to get a flask or something similar a mess with it…
Most of the tape I’ve used the fiber just goes through it… If it was black you might have better luck… Some people use black masking take for this…
It’s also probably related to thickness of the tape itself.
oh I see what you’re talking about. Does that happen with unidirectional scan?
These flasks are all basically the same. The 6oz and the 8oz have the same curve - I’ve got several from bourbon gift sets and such and I’ve compared them.
Top picture = no correction
Bottom picture diameter stated at 600mm
I have space to try 2 more times before I have to buy another test flask or 2… 
I got a diameter of 97.26…
The larger the number I use the closer it gets to looking good. Obviously straight, you can see the distortion as well.
Measurements are not right or we aren’t putting them into the equation properly… with only two, I don’t know how far off we could be…
Ever try aluminum foil, to see if you can lase at low enough power to just mark it?
Yeah it doesn’t make sense. I’ll try foil next time I have a few minutes to play
I only suggest aluminum foil since it metal, cheap, easy to form to something and I know you can mark it…
Good luck… let us know how it works…
Don’t know why I didn’t think of that. Too much time farting around with a CO2 made me go right to tape.
Hard to break old habits…
I might be able to fiddle with this tonight - what settings would you suggest for hitting that foil without burning through?
I’d start fast, with a short pulse duration and a higher frequency…
Put a sheet down on a metal surface and test on it…
When I get some time, I might try it…
Good luck… let us know what you find out.
like frequency 100 / qpuls 200? power level?
I ran this at 750mm/s@35%, Q-pulse 200, frequency 60 with a F254 lens… on aluminum foil.
I got this type of output from a 30mm square with a dpi of 0.50mm. Makes a pretty crisp line without passing through… 
Should wrap easily around the flask and give you good detail… while keeping the test costs low…
So the shiny side not the dull side of the foil. White marks. Cool.
Ok.
And darn it if “lasertips.org” isn’t down. That sucks.
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