Buldge on multiple parts on the same print
I did a multiple part print, that somehow is getting buldges on some heights, and i have no idea what is going on.
The buldge towards the top appeared on every part on the build plate.
I checked the leadscrews and i dont see any binding.
V-Core 3, printing Prusament PETG at 230c and using a 4028 at 20% fan speed.
This is a order from a client and im really running out of options on what is going on with this, i dont really understand.
The buldge is on all directions.
100% infill, but the parts that have buldges are all perimeters.
21 Replies
What speed are you doing perimeters? Some infill types are not suitable for 100%.
multiple-amethyst•2y ago
This can be a multitude of things. First thing, always: is the filament dry? Have you tuned PA and EM for this filament?
extended-salmonOP•2y ago
it was either 60 or 80. And in the parts there is bulding, it was all perimeters.
PA yes, EM yes, I left it in a air tight box with silica gel, dont have filament dryer yet, trying to find one to fit somehwere to dry things
good thing is, i tried only 2 pieces of these parts, bumped the temperature to 250 and raised the 4028 fan to 55%
no buldging
multiple-amethyst•2y ago
oh, nice.
so you fixed it?
extended-salmonOP•2y ago
well, it was only 2 parts, and i have printed these with others, but it was like a 1 hour print, and they didnt have these problems. These were in a6 hour print that happened, but im hoping it was the temperature
i did read somehwere that lower temp on PETG can make it funny when trying to be cooled down
but its weird how it got on all parts the same problem in the same print
i have my printer partially enclosed...doors, side panels, could it be me opening the doors creating some kind of draft?
multiple-amethyst•2y ago
what is your bed-temp?
extended-salmonOP•2y ago
85 first layer, 90 after that
multiple-amethyst•2y ago
I print PETG at 260 then 265 and 80 on the bed.
have you done PID calibration on the bed for your temperature?
although I think 260-265 is too hot for the speed i'm printing at now. Got a bit of a burnt part when I printed now.
extended-salmonOP•2y ago
extended-salmonOP•2y ago
the upper ones agre gone, i have increased temperature to 250
but have been trying to dial in the fan speed and getting nowhere
when that line appears, is the first layer after that first big section of the part
it also reduces print time in less than half
What hot end are you using?
extended-salmonOP•2y ago
dragon HF
Well, I have different equipment but I could give it a try if you post the model
Spent quite a bit of time dialing in petg... Usually can get good results
extended-salmonOP•2y ago
Thx... Will give it a try
extended-salmonOP•2y ago
thank you
do you have a 4028?
btw, i have also raised the fan speed to 55% and fixed most issues, but this line is the only thing that is left being fixed, tried to only have 55% first layers, to prevent overhangs warping
I don't... Ebm-papst
I run at 25%
Printing now but it may be a little while before I get back to the printer
extended-salmonOP•2y ago
if i run it at that %, corners just warp, but then if i raise i have that line problem
Could prob dial up a bit more heat & cooling on this one based on the corners but not a bad start for default petg settings
extended-salmonOP•2y ago
100% infill?
ok, so i think i figured out what is going on
the problem was appearing in other parts and this morning i finally found out
im printing the parts close to the front, and i was watching the print, all was going well, with my doors opened, closed them, went downstairs, came back, line was visible on the print, open the doors, next layer, line gone, closed the doors for another layer, line back on, open them, next layer line normal
what i think its happening, since my enclosure is only on sides and doors, top part is open
air from the fan that cools the print, is being also pushed from the doors back and cooling part even more
if i leave them closed, probably normalizes in some layers, this happened before i think
i will probably just add more parts and move the parts away from the front, so this does not happen again
Yes, 100% infill