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Do you mean 'it can not' ? What kind of bed do you use ? Glass or Pei ? When using a glass printing bed using a PVA glue stick can help. I personally print on an aluminium PEI plate which I clean using nail remover (aceton). Images (photos) may help determining the issue

Hi, In a 3d design I have parts which need support. Only when adding a support for these parts, the support material does touch but the design itself. When printing with PVA or White breakaway the support material does not sufficiently stick to the PLA of the design and therefore printing of the overhanging parts do fail. A simplified design I now use to test the support material printing is attached. This should be printed between the build plate and the sphere. Has anyone tips how to improve the stickiness of support material with the PLA ? Fantastic Densor-11.stl

I use Ultimaker Tough PLA, use the adviced temperature of 210 and 215 for the first layer Think p-kimberley did point me in the right direction which is contamination of the printing material by support material. I am now revising the design, making testprints of parts of the design and then if all seems ok print it once again in full with an ooze shield and remove the support printing in the holes.

Ultimaker 3, firmware 5.2.11.20190503 with Cura 4.5.0 Ok, i thought i had the correct documentation Marlin so probably referenced the wrong Git repo. Suggestion for a better link ? Nope, have printed on glass and find it really in-productive. Spent to many hours resolving adhesion and warping issues which all vanished after installing the PEI coated aluminium plate. Think so, i have to deal with it 🙁. Now start a print, abort it after calibration is done and then start the job again.

I always print small test pieces, but in the end it has to come together. There is where it failed here. In the next full print i will try to use an ooze shield, to prevent contamination of the print by the support material. Will also try to prevent printing support material in the holes by changing the support overhang angle. If that fails i will see if i can print as simple clip in the holes which can be removed easily afterwards. Thanks

The bed and hotend are already pre-heated when using Cura. The issue is that the bed needs to warm through due to the thickness of the aluminium plate. Using the Marlin firmware documentation as a reference i tried the following by setting the initial build plate higher than the desired temperatur and then wait till the temperature of the build plate is cooled down back to the desired temperature. M117 Heating up PEI Plate M140 S80 M190 S{print_bed_temperature} Unfortunately, the message "Heating up PEI Plate" is shown with "Press to Continue" , but then immediately starts printing.

@p-kimberley Ah contamination, did not expect this to be the issue. Wil try to use the support blocker at the position of these holes.

I am working on a prototype which has holes for leds. These holes are dimensioned in such that some pressure is needed to get en keep them in place. The rim wherein the leds are placed is 4mm thick. In most places i am able to push in the leds without issues, but at other locations the layers are separating after pushing in the leds. Material is Ultimaker Tough PLA, printing temperature 200c. What is the best approach to increase the layer bonding ?

And that is exactly what i tried with the gcode instruction ` G4 P120000`

Instead of the default glass plate i am now using a PEI coated aluminium plate instead for almost a year now. It saves me a lot of trouble with adhesion and warping which i had when printing on glass. There is only one small issue when initially heating the bed. The surface temperature of the bed lags behind when initially heating the bed . Therefore printing the first layer after a cold start sometimes fails due to adhesion issues (yes i know... read on) caused by a to low temperature of the surface of the printing bed. When i pre-heat the bed (manually) for some minutes before starting a new job resolves the issue. So tried some Start G-code to heat the bed and wait 2 minutes before actually continue to print the first layer M117 Warming up PEI Plate M190 S{print_bed_temperature} G4 P120000 For some reason the message is shown, but shortly hereafter the first layer is being printed. Is this actually possible ? Set a display message, set the print bed temperature and wait a few minutes before starting the first layer ?

So have still no reason why they abandoned the aluminium build-plates except the statement that it did not satisfy the companies standards. I bought a custom PEI coated aluminium plate from clever3d.de and this is really working well. Object (PLA/PVA en TPU) stick perfectly while printing without any preparation for the plate. When cooled down, the object can be taken of the plate without any noticeable force. No warping 😀.

Strange they left the feature it in the software for the Ultimaker 3

Hi, I recently bought an aluminium PEI coated printing bed from clever3d. Since i am changing from a glass printing bed to the PEI bed i noticed the specified printing bed in Cura. I tried to find any configuration in Cura where i could add a printing bed type with a specific configuration (e.g. temperature) for specific materials. Is it possible to specify a custom printing bed in Cura with it's own dedicated settings or is the only available printing bed "glass"?

Ok, Tried the glue stick the past 24 hours. To get a smooth surface i dissolved the glue with some drops of water to spread the glue evenly. After printing the object came of easily. There was some warping on the edges and PLA did not bond perfectly everywhere, e.g. at the lower end of the ' ä ' and at some places in the WiFi symbol. Probably due to the fact that the glue was not spread evenly? Also you can clearly see the water pattern at the surface. So will try the salt method next to see if it makes a difference.

Why should the glass not be clean enough? Badly cleaned glass prevents proper bonding, i got the opposite result. It seems that Tough PLA sticks better than normal PLA and as good as ABS. With 'normal' PLA the designs do come off easily. Always clean the glass plate with some water and ammonia, with constant results. Also used a PVA raft many times, but to get the smoothest surface on one side of the print decided this time to print straight on the glass. Will retry the print now with some glue and a damp cloth to distribute the glue evenly.