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@Olaf K. Ich hatte zuerst auch Probleme mit der Wifi Einrichtung. Die Probleme sind verschwunden nachdem ich den USB-Stick vom UM3 entfernt habe. Ist das bei dir eventuell auch der Fall gewesen ?

Great Thank you for the feedback!

I actually experienced the same problem after updating from firmware version 3.7 to 4.0. First it pushed the filament non stop into the nozzle. Later on it retracted and would not stop. It resolved itself (for now) after I reflashed the firmware for the 4-5th time.

As the most active UM3 firmware developer @robinmdh in this forum. Do you mind taking a look at this problem? Any advice or explanation on whats happening?

You wouldn't want to do both and therefore people would probably only use the switch. (Just remembered that this was some advice in the raspberry pi documentation at some point I think) What about a standby(motors and oled display turned off until click wheel input) mode? To prevent oled burn in. Turning off the screen would also be nice while printing after x amount of time as I know UM2+ suffer from burn in. Or some kind of pixel shift to prevent burn in (like samsung does on their smartphones). I do like the idea of an indicator. Maybe a static indicator, which gets displayed for a certain time (1 minute) after input ? Yes I can confirm that this happened to me a couple of times with firmware 4.0. I think I also experienced it after a power cycle but not as often as it isn't the normal use case. Haven't printed that much with 4.1 and therefore don't know if it was fixed. After confirming this message as well as the one after an aborted print. Oh :( Can we expect an update withe the fix soonish?

Just an idea. What about printing your speaker housing with a relative low infill percentage and later on filling it with sand or something else to fill the gaps instead of printing it at 100% infill.

Yes please change it to not move to the probe location. It can be quite annoying from time to time. I'm happy to know that Ultimaker is working on new features to increase the possibilities of my printer but I would also like to see Ultimaker working on those small things. For sure they can't be marketed as big improvements but I think they can make the user experience better. I also think that people sometimes don't ask for it because they have accepted the fact that the UM3 does it this way.

I also noticed temperature drops of the right extruder. Only 10 degree drops but still. Screenshot of the temperature graph running firmware 4.0. To me it looks like the power management is somewhat off. The IMHO undersized power supply probably doesn't help. I remember reading that Ultimaker changed a few power setting with 4.0. Maybe @maht or another UM employe can help us to fix the problem?

I also experienced the bug(printing the last job even when not selected) a few times in the stable 4.0 release. @robinmdh How long do you recommend to wait? What about a way to turn of the machine by selecting shutdown on the lcd?

Sorry for the late reply. First things first: @mendells Link to my UM3-gcode and cura project files to test feeder performance cylinder-test-025mm.zip @StephanK Sorry to hear that you had some trouble with the firmware provided. I just recently flashed an UM2 extended+ with Ultimaker Cura (3.0 I believe) and everything worked fine. Anyhow I will talk to Martin to make sure the UM2+ firmware is correct. I hope you're all happy with your DDG upgrade! If you have any suggestion for improving the installation manual or the DDG please tell us

@rebekah_harper I think the UK Bondtech reseller is Emvio Engineering but they don't offer the upgrade yet. Therefore the best way is probably to buy it from Bondtech directly: http://shop.bondtech.se/ec/extruders/ddg-extruder_ultimaker2_en.html @mendells I currently don't have the time to print your test but I asked Martin and he will print it for you later today :-) Will be uploading the files tonight. Is there a way to upload them to this forum? Regarding the testprints I did. The main focus wasn't really on the speed as with acceleration you may never hit the speeds. I mainly wanted to showcase that the Upgrade outperforms the factory feeder.

I would assume it's the newest stable version as the UM3 doesn't ask you to upgrade to a not stable version?! Got the same message yesterday but didn't want to upgrade before knowing a bit more details about whats new/ has changed.

Oh that sucks :( Did you use UM3 auto bed leveling before? The update might have deleted a stored offset to your build plate and you just need to do a manual/auto level. Or something went wrong. There is some information on how to go back here https://ultimaker.com/en/community/51870-um3-extend-reboots?page=1&sort=#reply-192684 @SandervG Do you mind sharing the changelog for the new UM3 firmware ?

@mendells Sure! The model used was a cylinder with a diameter of 60mm and a height of 20mm. Printer: Ultimaker 3 Material: Ultimaker red PLA Settings: printing temperature 200 degrees wall printing speed 120mm/s layer height 0.25mm wall line count 1 min layer time none no infill, top and bottom layers force retraction at every layer retraction length 6.5mm retraction speed 25mm/s If there is interest, I can also share the g-code and cura project files. @rebekah_harper Compared to the UM2 feeder the stepper motor requires to turn faster with Bondtech DDG (311 steps per mm). Compared to the UM2+ feeder (369 steps per mm) the stepper motor turns slightly slower. The Bondtech(QR and DDG), due to the dual drive gears, is able to push the filament with more force. Therefore printing with a 0.15mm nozzle should benefit, I believe. Please keep in mind that printing with a 0.15mm nozzle and 2.85mm filament has limitations.

Yes, just four screws to open the top cover. Five if you count the screw to release the spring tension You can see the main drive gear through this window.

Hi, Christopher here. (One of the designers of the Bondtech DDG) I’m happy to answer your questions ;-) Regarding print speed: Early on in the development phase I created a quick speed performance test. The result of the test can be seen in the picture below. The same G-Code file was used but the extruder/feeder changed. The test shows, that the Bondtech DDG is able to push with more force then the Ultimaker factory extruder. Therefore you may increase your print speeds, but please be aware that the Bondtech DDG is only one part of the equation. A prominent speed increase can be seen if your print flexible filament. I print Ultimaker TPU @50mm/s without any issues. May print speed of the the Ultimaker factory extruder is about 25mm/s. Cleaning: In theory the UM factory feeder may need to be cleaned less often. In practice I would say it’s the same. Martin and I chose to include a small window for the user to check if the gears need to be cleaned. Cleaning can be done exactly the same way. Main benefit of the upgrade is the improved reliability. From time to time I also encountered grinding and slipping like latreides. Especially if you print at bigger layer heights. Since the first prototype of the Bondtech DDG I haven’t had any!

After resetting my Ultimaker 3 twice the problem seems to be resolved

The Abort Print command doesn't/didn't work with my Ultimaker 3 updated to Firmware 4.0.1. Instead of pulling the filament back and the print head away from the object the machine pushed the filament into the nozzle and didn't stop in a reasonable time. Had to turn the machine of manually :/

Have a look at Daid's detailed explanation of the active leveling in the inside the ultimaker 3 series : https://ultimaker.com/en/community/50635-ultimaker-3-style-autoleveling-on-an-ultimaker-2

Ok, thanks! Does anyone know why Ultimaker still relies on a PTFE tube and hasn't switched to all metal ?

Please be aware that the Ultimaker knurled wheel probably isn't the best solution for 1.75mm Filament!

@0scar Basically you are not allowed to change the material type as cura uses them to match the print profiles. See https://github.com/Ultimaker/Cura/issues/2102 I still think its kinda a work around to select a "matching" material instead of just being able to create my own. At the moment this is just convenient if you are in the Ultimaker eco system using the filament Ultimaker sells. Would love to see Ultimaker working on it !

Do you refer to the printcore or the ultimaker 2 coupler ?

Do you need to worry about couplers degrading with the Ultimaker 3 ? The disassembly ( ) of the printcore did show a piece of teflon :/

Any news regarding custom material in the Ultimaker 3 ? I would love to see it implemented! The UM3 uses the material information for a couple of things (load temperature, printing temperature, move material temperature, xy calibration print temperature) which need the right temperature for the filament being used. At the moment it's also quite hard to see which Ultimaker material might share the same temperature as you only see the name and not the temperature. All in all it would make using different materials far more convenient.