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Hi to all Success ! First test at 250° print temp of the PBI with ABS material, Benchy was printed with the EasyFil from Form Futura standard ABS material settings of the printer 0.4mm nozzle, 0.1mm layers, 50mm/s print speed, 0.8mm wall/Top/Bottom, 90° bed temp, 25% cooling fan, 3mm retract distance.... No any extrusion problem, no friction issue, the ABS slides better in the Bowden tube than the PLA The diffilculty was more in the bed adhesion managing and in print temp fine tuning to find the right temp suitable to this ABS filament, I started print fisrt with 260° then slowly down to 252°. It's not yet the top , but it's quite good print result, it was worth it to catch a good headache because of the ABS vapors, Im not used Result after a light clean of some small dots with the fingernails, there are 2 horizontal lines seen on the the third pic, the first near upper the bed, it's due to the temp tuning from 260° to 252° the second higher, it's due to a suddenly small warping on the bed

OK ! I suspected before beginning, especially to have friction problems with the PLA on PBI which is not the case, it is known that the PLA was poorly extruded with different materials such as ceramic, peek, or full metal hot end. I can claim that a full PBI hot end works well with PLA extrusion. The specifications of PBI claim that no other known technical plastic in melting condition can paste it, The challenge now is to check it, it can not stick but eventually significant frictions may occur, we don't know, the next tests will allow for see.

Hi SandervG sorry, I'm afraid I do not have understood well your second question.... Hi Dim3nsioneer : thanks ! ask SandervG, I think that the manufacturers don't remain insensitive to things happening in the forum Hi foehnsturn : thanks ! I follow your "multi extrusion approach" thread, you done very impressive works. It's difficult to answer your question, like that cold! but I think it's quite possible to do something more compact for your technical approach.

Hi to all thanks 00D00B after dozens of hours of service whith good print results, a few minutes for checking if everything goes well, a few seconds to unclip the fan sets and voila! screwless print head the PLA prototype units seems well survive at an average of 210 ° long-time work, except a small heat block contact at the rear of the centrifugal fans duct, no deformation of the XY support. the PBI coupler is OK the print head is very stable, no drift in the 3D axis It's time now to test other materials at higher temp !

forgot to mention this work to stay in my design spirit, an alternative Aluminium hot end support which reuses,the UM2 metal isolator and the PTFE, in my prototype it's a PBI coupler

Many thanks SandervG Yes, actually I'm still test, always on the PLA since I took advantage of having print jobs to do, before continuing on tests at higher temperatures, I am very optimistic because with the PLA, it is going very well, I had a small problem with the PLA Wood that has rather revealed as a nozzle clogging I will not fail to communicate on progress some samples fashion bag with PLA Scrabble letters embroidery drump with PLA Wood

Hi ! I have trouble expressing my anger Thanks swordriff !

I do not still do that for hours !

fun tests ! the PIB thermal insulating power, after heat nozzle and waiting since about 20mn. the coupler can be manipulated safty by hands

it's visible with the atomic pull

Hi to all I'm always in playing with the PIB to learn more and to better understand the behavior of this polymer, I improved especially the hot end fan shroud, it gets here a great importance for the heat break zone size, the cold/ hot transition must be as short as possible ! I print yet still with the PLA, the print head prototype, XY support and fan shrouds, , they are just painted with car wheel ring silver paint. to partially answer Neotko and to get some expert opinions on this printing part of the Ultimaker robot scaled to 1.5 Classic Cura settings : 0.4nozzle, 0.1mm layers, 1.2mm thick wall/top/bottom, 25%infill, 50mm/s speed, 55° bed temp, 205° print temp, 2h20 print time. and 2.5mm rétractation distance at 45mm/s

Bonjour à tous ! bonjour darkdvd Je ne dispose pas en stock de filaments de ttes. sortes, n'ayant principalement imprimé que du PLA jusqu'à présent et que pour des études prototypes de pièces techniques, Et pour la communauté et pour moi, les analyses des tests effectués par un expert seront certainement beaucoup plus justes et plus objectives que les miennes . J'ai rencontrés des soucis avec du PLA/PHA Woodfill de chez colorFabb, je ne suis pas arrivé à coller la première couche sur le plateau, cela faisait un gros paté autour de la buse 0.8mm, comme si l'extrusion était trop basse en temp, ou tout simplement en sous-extrusion ?!! dans les mêmes réglages et conditions cela a marché avec l'isolateur PTFE

Since the beginning my UM2 extended ( not +) works with Cura 15.04.3 and with the Bondtech feeder, the 24w cartridge is still in use also, I mainly printed with PLA and PLA wood, and I never get grinding issues or other boring problems, as it works well, I preffered to do more on hardware design researchs and prototype tests before take time to play with software updates and Gcode, I have to learn more in this side to manage comfortable these things. The retractation tests would be not similar if it done with the stock UM2 feeder ? With the Bondtech feeder depending the 2.85 PLA quality used the retractation distance played between 8 to 10 mm, now with the PIB head I reduce by the half 4mm with better result, absolutely no oozing ! it appear under 3mm, the feeder motor is much less hot also. I think also that the retractation distance depends on the inner diameter size of the bowden tube, more if it closed to the 3mm less distance will need to retract.

Hi Neotko Ok ! I 'll try , have you an object to print for sample to suggest ?

I think they mean in high volume serial production, homebuilt machining in my case, I machined more with care than with difficulty, with high quality tools used for hard steel, titane or inox machining, I don't know how limit that will resist to break, I don't try crash test I don't test other materials than PLA yet, time to perform some details in the prototype design, I have only one printer, I need to keep it operational before going further .

Machining will not no more expensive than machining hight grade steel or inox that would cost about 100/110 € if machining 1 or 2 parts the cost is also on the PIB Polymer, I paid 362€ all included for getting the PBI bore 305mm L x 19mm dia. the all in 1 coupler has 37mm long, so about 44€ material cost. In the 2 cases the cost will depend of the qty. For printer makers that would be interesting in mass production !? especially if 1 part can replace 3 or 4 different parts ? but less spare parts to sell

Replicating fans shrouds prints, PLA "Polymax" from Polymaker 0.1mm layers, 200° print temp, 30% infill, no supports. the hot end fan shroud at 50 mm/s speed the dual fan shroud at 60 mm/s speed I notice the extrusion is very fluent and feel that I can down the flow rate

Hi Didier thanks ! What is the most interesting with the PIB, is that the possibility to make the coupler in only 1 piece, with a 3.2mm hole through, nothing else, in its top side the coupler is screwed to XY carrier and locked with an annular threaded ring, then the heat block is screwed directely in its other side, like it's screwed in the stock inox isolator, the coupler heat sink design shape is large enough for getting a very effective heat break.

Merci à toi ! Je suis basé dans les Yvelines plus exactement à Andrésy, à 200m. devant mes fenêtres j'ai vue sur le confluent Seine et Oise

Thanks Neotko ! The thinks visible back on the bed are a outstanding project for optimize and rigidify better the overhang bed tray support with fine level adjustable rods, it's not yet completed

Hi to all Going further with the PIB concept and tests. PLA material is known for its sticking & frictional extrusion issues solved by PTFE use, which have to works on it hight temp limit. PIB polymer seems to solve many problems !.... may be other new issues will appear, future test checks will have to do... However, the first test is very encouraging ! 2 main parts vs this clip the fans set & connect the thermal sensor and the heater cartridge In work

Hi 00D00B Thanks ! no proplemo ! I just advice that it's a homebuilt personal project, it's for for fun !

Hi to all We all know the life time problem and its collateral damages of the PTFE isolator coupler, especialy when it used in continuous hight temp extrusions 260 to 300 ° over a bit over Here is a first feedback from the use of an insulator made with PBI polymer The goal is to test first this polymer matérial for PLA material without no sticking problem issues, the tests I done are very positive.... It works great ! some pics with a PLA extrusion work With 425° best mechanical properties ! now it's possible to achieve a very compact print head with the all in 1 part isolator coupler, as I described before a customized print head project in an other post : https://ultimaker.com/en/community/21359-re-design-the-print-head-to-centre-the-nozzle It's almost ready to go further in testing, time to achieve the assembly and to mount it on the UM2 the pic shows the " PIB " print head closed to be finished, the stock heat block, it's just for sample, the Olsson block and fans are planned

Hi Neptuna ! UM2 panels DXF files from Autocad 2013 direct dowload here : http://www.casimages.com/fd/8BGycJS97HQew8r http://www.casimages.com/fd/FTAET9i4lUP6mjY http://www.casimages.com/fd/egnmumQKhHbyLEq http://www.casimages.com/fd/7mgMMpUHCNHfsSK http://www.casimages.com/fd/TQ5i0qal5LHFrRJ