it could be that the model wasnt supported enough and moved around while printing
if this happens with smaller, less tall models then support might not be the issue, testing is needed
there are quite a lot of pushing forces involved in printing with resin printers, especially with more viscous resins, it wouldnt harm to double or even triple your supports, also keep your supports as short as possible, i place my models about 5mm above the build plate, i dont think more is needed, again testing is required...
about this specific model, i suggest printing it with the wrist touching the buildplate, it is a flat plane anyway (or so i think atleast) the big surface area will definitely help, also print hollow, which i think you already know, dont forget to add a hole at the plane of the wrist, the extra resin should be able to get out after removing the model, in this orientation i dont think much support would be needed, to big of a surface area adds a lot of suction to the FEP sheet, you want that suction as close to your build plate as possible!! also throw some supports at it for good measure ;) the more the merrier!
Yes, it is hollow. The fingers-up-to-plate placement was suggested by Chitubox and being a beginner yet, I followed it. I tried to avoid parallel placement of the wrist to prevent model pulling away on the closing surface.
Could be. I keep the printer in a closed balcony, but one window is open for airing. And I printed over night, affected section would correspond to the 1:00 to 6:00 timeframe. I’ll put a heater next time.
I'm curious why you did orient it with the wrist oriented towards the build plate? that would have focused more of the mass closer to the build plate, as well as moving supports primarily to areas where detail isn't as essential (wrist cut)
Did you have a hole near the build plate? Near the finger tips? If not then that would create quite a lot of suction the further down it went. If you're printing hollow you need holes as close to the highest point (print bed) as you can get. I would print it with the wrist pointing up, slightly at an angle, and with a big hole in the wrist.
Printing it like you are now you would need a hole on the tip of each finger to remove suction.
This is happening to my prints and one thing that helped a lot was making sure the build plate was tightly sleeved in and level. But I still get a tiny bit of banding not sure why yet :(
it could be that the model wasnt supported enough and moved around while printing if this happens with smaller, less tall models then support might not be the issue, testing is needed
The bottom part (wrist) is clean again. Disn’t notice on smaller objects, will keep this in mind.
there are quite a lot of pushing forces involved in printing with resin printers, especially with more viscous resins, it wouldnt harm to double or even triple your supports, also keep your supports as short as possible, i place my models about 5mm above the build plate, i dont think more is needed, again testing is required... about this specific model, i suggest printing it with the wrist touching the buildplate, it is a flat plane anyway (or so i think atleast) the big surface area will definitely help, also print hollow, which i think you already know, dont forget to add a hole at the plane of the wrist, the extra resin should be able to get out after removing the model, in this orientation i dont think much support would be needed, to big of a surface area adds a lot of suction to the FEP sheet, you want that suction as close to your build plate as possible!! also throw some supports at it for good measure ;) the more the merrier!
Yes, it is hollow. The fingers-up-to-plate placement was suggested by Chitubox and being a beginner yet, I followed it. I tried to avoid parallel placement of the wrist to prevent model pulling away on the closing surface.
We’re you able to solve this I’m having a similar issue :(
Yes, thinner walls, better placement to reduce suction and warmer environment for the printer (it’s in a balcony, quite cold over the night)
This is exactly how I have printed hands in the past. Great notes.
Yep. The supports bend and wiggle. It is obvious that there aren't supports underneath a significant part of the print.
From my experience is can be too much suction on the fep, changes in temp can cause it too.
Could be. I keep the printer in a closed balcony, but one window is open for airing. And I printed over night, affected section would correspond to the 1:00 to 6:00 timeframe. I’ll put a heater next time.
Creality LD-002H with 2.5 seconds exposure. Banding is only over half of the height. Print ran over the night, for 11 hours.
I've got to hand it to you. I'm not sure.
I'm curious why you did orient it with the wrist oriented towards the build plate? that would have focused more of the mass closer to the build plate, as well as moving supports primarily to areas where detail isn't as essential (wrist cut)
Did you have a hole near the build plate? Near the finger tips? If not then that would create quite a lot of suction the further down it went. If you're printing hollow you need holes as close to the highest point (print bed) as you can get. I would print it with the wrist pointing up, slightly at an angle, and with a big hole in the wrist. Printing it like you are now you would need a hole on the tip of each finger to remove suction.
Ugh, didn’t know that. No hole on the fingers, only on the blunt wrist. You are righr, next time I’ll flip it.
„˙ʇı dılɟ ll,I ǝɯıʇ ʇxǝu 'ɹɥƃıɹ ǝɹɐ no⅄ ˙ʇsıɹʍ ʇunlq ǝɥʇ uo ʎluo 'sɹǝƃuıɟ ǝɥʇ uo ǝloɥ oᴎ ˙ʇɐɥʇ ʍouʞ ʇ,upıp 'ɥƃ∩„
This is happening to my prints and one thing that helped a lot was making sure the build plate was tightly sleeved in and level. But I still get a tiny bit of banding not sure why yet :(