Is there any play in the resin tray left to right (assuming the long supports are on the hinge side)?
Thinking that you might be seeing a slight shift as the machine peels each layer.
Check but don’t yank hard on the tray. Also check and make sure the build platform isn’t loose. There is a screw on top that you can tighten a little at a time so the clamp will snug down.
no, everything is ok, actually the machine is new.
the tanks resine and the build platform dont have any play.
is very frustrating for me this rough finish
Wow! That’s a pretty impressive part — especially when all assembled. We’ve seen some issues with similar artifacts like this before, and truth be told, they can be tough to get rid of entirely.
As a first step, I would try printing the bottle at a slightly greater incline. You might end up with some supports making contact on the outer (or inner) surfaces, but those may be less work to clean up than the entire surface. Essentially, the verticality of the print may be creating some artifacts that build up over time.
I would also contact our support team and see about getting instructions to clean your mirrors. A persistent bit of dust could be contributing to the issue, but it’s hard to know.
I noticed that you have the bottle opening towards the supports, doubt that is the cause for the surface finish problems but you will have a bottle full of resin that will need to be emptied, try turning it the other way so it empties as it prints?
hi @KenCitron, the position of the bottle don’t cause a full of resin bottle. actually the bottle is empty. because in the bottom of the bottle always is open. in the final 50 layes the laser close the bottle, so never have a full of resine bottle.
I still think you have a tiny bit of play on the build platform.
I also noticed you have lots of bubbles, using the scraper I completely empty the tank and strain the resin between prints. Gives me a chance to scrape off any light fogging that might be from the resin sitting and a chance to inspect the tank and mirror.
I just completed a print and the sides are perfect other than a few specs from the supports.
I had one other print that was tall, not a cylinder but opposite sides had the same pattern you have on the bottle and it was the build platform being slightly loose.
Has anyone else notice this with the build platform loosening up over time?
@KenCitron no, i’m very sure of that. i dont have any play in the build platform… i use a completely new build platform and i check the screw adjustment and in the build platform and is ok. the tank resine and the resine are completely new!
I cleaning the mirrors before to print this particular part. and the laser test result is very good.
I think I found the secret for a good surface finish in cylinders or bottles. the previous test I have a 2.5mm thickness in the bottle. and the result is very bad. i changed the thickness to 1.5mm and the result is completely different!! almost perfect!
I have similar issues with cylinders. Even with our really super expensive ABS machine we have axis-of-movement artifacts on occasion. This is sort of what these look like. I wonder if its a vibration thing with the laser / galvo or just lack of tolerance with it in the first place.
Mine aren’t exactly symmetric. More like 4 o’clock and 8 o’clock.
I’d note that, one of the very first things I printed when my machine came back form service was a cylinder and it had these artifacts… so it was ‘factory spec’ sans FedEx ‘break in’ and I still saw these.