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No does not pop, smoke or sizzle. When feeding it drops down straight and does not curl. No dark spots in the PVA indicating that moisture is the issue. Printer is in a closed environment with multiple moisture absorbing bags. It does stick badly to PLA but as can seen on the photos worse on the bed itself. So, sticks badly everywhere. Clean the build plate using ammonia and a drop of water. Rub it with cleaning paper till i feel some resistance. Works perfect for all materials o use. Only now and then PVA gives me headaches. Because PVA does sometimes stops sticking on other PVA layers is do suspect the feeding or retraction settings...

Hi, Does anyone have tips for better printing with PVA as support material? The PVA seems to stick unevenly on my printing bed and on top of other layers. Most of the times is goes well, but sometimes a complete loose web of PVA is floating through my printer when checking my print after a few hours. Should i increase, decrease the flow (currently 105%) of PVA or disable retraction ? Something else to improve the printing of pva? Cheers, Peter

I have cleaned the glass plate in the past many times using ammonia and then use a paper towel to rub off the remaining fouling when the plate was dry. Using this cleaning method the PVA normally sticks like glue. Alternatively i cleaned the glass plate with warm water and some drops of dishwashing soap (Dreft) on a sponge. Then when the plate was dried, i rubbed the plate again with a paper kitchen towel till i noticed that the resistance between de paper-towel and the glass plate increased. So followed the Dreft-and-rub method again, and it seems that the PVA sticks like glue again No i do not use glue, salted water or any other materials to stick the filament to the plate. Thanks for the response !

My PVA has been stored for a two week period storage in a bag with pingi dehumidifier bags. After loading my PVA again the PVA seems to create tension resulting in uplift / release of the PVA in the corners. Any ideas how to resolve this ? Further drying with the bags seems to be useless. Need i invest in a food/pva dryer to further dry the filament ? Also cleaned the glass plate using a dry cloth with some ammonia which have me the best results in the past.

Thanks, Although the humidity is low, PVA seems to be quite hygroscopic so in the long term it will absorb moist. After usage i do store the filament back in a zip-lock bag with silica bags. Is the absorbed moist causing the burned/discolored material ? The PLA seems not to have this issue, only PVA over and over again. A dry box is not an option for me due to the lack of space available behind the printer. The printer is stored in an Ikea PAX closet. When closed it keeps the temperature stable. But there is not enough space behind the printer due to the depth of the closet. It would be great if a cover came available this would fit over the spool holders to keep the filament dry.

Regulary my BB printcore gets clogged. Even when printing for hours fine it can get clogged during the middle of the night making the feeder grind the filament till it snaps of. When i do a hot and cold pull the filament comes out clean when retracting the PLA or cleaning filament. (Used both). But when making a hot pull quite some blackened filament comes out the nozzle. Also while printing, sometimes there are some black spots of filament in the PVA support structure. I filmed the extruded blackened filament while making the hot pull. http://www.youtube.com/watch?v=Jvl-ChWhDME Any ideas what is causing this and how to prevent or to resolve this?

No one who can advice me ?:(

Hi, I have a brand new UM3 which has been active for approx. 5 days now (runtime). In my latest 2 prints the layers are clearly visible and the printing on the x&y axis seem to be a bit irregular. Do i need to retension the belts to resolve this to get a smoother vertical surface ? The example below is printed using the default fine profile.

Hi, I just printed my first model with an Ultimaker 3 with PLA and a layer height of 0.1mm, no supports. The printer is calibrated (x/z and z). The model is simple wheel for a robot which has to be attached to a stepper motor. When measuring the outer dimensions of the wheel, the dimensions of the design and model match. But the hole in the middle is 3.01mm x 5mm in the design, in the printed model this is 2.4mm x 4.4mm. Is this expected and should i calculate a scaling factor due to shrinking of materials ? Or is there another issue i should fix ?

I am fairly new to 3D printing and currently i have access to a shared Ultimaker 2+. Getting the hang of tuning Cura to get the best results when printing with PLA, but.. the supports are not sticking evenly to the glass plate all the time and therefore sometimes ruin my prints. As you can see on the top view of the large support structure, not all support lines are perfect straight and sometimes even missing. What is the best way to resolve this. Mind i do have no access to the printer myself, so cannot prime the plate with salt water is i have seen in the community. Cheers, Peter