Printing problem
the first time that I used all the printed plate to print small object, 2 of them does not have hold on the plate.
Today, I have print a part that was long, than for the second time I was printing in the same area. On the same area that the first print does not have hold on the plate, the part have warp, but only on this area.
I thing that maybe 1 inch of the print plate, on the side of the power supply, don’t stick on the print.
Why, and, what I can do to resolve the problem. On the rest of the print plate, the print hold correctly on it.
My print is in PLA.
I have other large print to do, that will use this area.
RE: Printing problem
Adhesion is most often contamination. Usually finger prints. Keeping the bed clean is the secret to success. Here's a list of cleaning recipes and what they do best.
Also - large parts, even PLA, warp. Increasing bed temperature 10c can help keep a larger part from lifting in corners; also, designing parts to have radiused corners rather than square corners also help, if you have that flexibility.
But to clean the bed, use the soap and water method. It should help.
Alcohol rinse: every few prints
- Gloves recommended.
- Once in a while, an alcohol rinse is helpful to remove PLA residue. It does not remove finger oils well.
- Pour a 5 cm puddle of 91%+ alcohol in the middle of the bed, with clean hands use a fresh paper towel to scrub the bed. Wipe up all the alcohol.
Acetone wash: infrequent
- Pour a 2 cm puddle of acetone on the bed, scrub it around with a fresh paper towel. It will evaporate fast as you clean. This step removes PEI oxides that form over time and with heat, and improves PLA adhesion to a like new state.
Hot Water wash: often, as needed, and after any of the above
- Handle the bed only by the edges.
- Wash the bed in hot water, use a fresh paper towel as a wash cloth, with a few drops of plain dish soap (Dawn, unscented, no anti-bacterial, etc.).
- Rinse well in hot water - if you have very soft water, rinse a bit longer.
- Dry the bed with a fresh paper towel.
- Handle the bed only by the edges.
- Place bed on printer.
Streak test: when contamination is suspected
- With a fresh piece of paper towel, and very clean fingers, dampen the towel with 91%+ alcohol, and wipe the bed side to side moving back to front, like you're painting it with alcohol. The alcohol should be thin enough on the towel it quickly evaporates. If you see any streaks, the bed is dirty and needs a wash.
RE: Printing problem
I will try to increase the bead heat.
But I found only strange that the problem seem to be at one place only.
RE: Printing problem
You have grease on your plate. Maybe you touched that spot with bare hands.
Do a deep clean. (soap water and sponge, rinse with clear water, dry with a paper towel and give it a good wipe (smooth sheet: acetone; PC: IPA))
RE: Printing problem
Acetone wash: infrequent
- Pour a 2 cm puddle of acetone on the bed, scrub it around with a fresh paper towel. It will evaporate fast as you clean. This step removes PEI oxides that form over time and with heat, and improves PLA adhesion to a like new state.
It's important to know which type of surface you are printing on. If it is the textured surface you should not use Acetone at all, per Prusa.
RE: Printing problem
I use the flat surface bed.
RE: Printing problem
finally, I have clean the plate with soap, and augment the temperature to 70, and everything was good this time.
RE: Printing problem
Does it’s a good idea to keep my bed at 70 went I print all of my PLA?
RE: Printing problem
60c is normally a good PLA bed temp; but when printing large items that tend to warp, 150mm or more, then 65c or even 70c is better.
RE: Printing problem
Don't exaggerate. From 65° normal PLA loses adhesion again. With some manufacturers this may work.
The trick is to hit the right spot for the respective filament.
RE: Printing problem
I will try after work at 65, I have a other big part to print.
I have check the manufacturer spec, and this is what he suggest:
Print temperature : 190°C – 230°C
Nozzle size : Any
Print speed:
Retraction: Depending on the printer. See printer specifications.
Hot print bed: 50°C – 70°C
Cold print bed: Yes (use painter's tape for better adhesion)
Post processing: Annealing (80°C – 130°C)
RE: Printing problem
Every print you need to clean with alcohol.
Soap if needed.
Acetone is not good for the pei plate, but sometimes needed, do not do this to often.
Big flat parts, clean with soap and alcohol, and i do use glue stick, and a brim attach to model 4 or 6 lines, this to combat curling.
And first layer should be 100% good, so sticking to the plate is optimal.