After an unsuccessful first printing i noticed that no filament comes out of the nozzle. In build guide stage 10 step 28 was successful. I repeat this step and after 30-40mm the extruder can't push the filament into the PTFE Tubing. In the fist 30-40mm the filament comes out of the nozzle and everything seems to be ok. I unload the filament, cut the end and load it again but with the same result. I try to push the filament with my hand and pressing the Idler Arm in the same time but once more the filament seems to stuck somewhare in the hotend. The temperature was 200, i try in 220 with the same result. The speed was low.
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@hansamann Your extruder feeder idler arm might be on too tight, not allowing the spring to fully expand and press the filament against the feeder wheel. try loosening the screw a little. Also try increasing the current to the extruder motor by turning (very slightly) the stepper drivers trimpot clock-wise (1/8th turn). "Oiling" your filament might help also, but it's a controversial topic, a quick google search will pull up some interesting reading.
I just tried a different nozzle, switched from 0.3 to the 0.8 but my problem stays the same. The extruder clicks and cannot push the filament through any more. I tried to unload all the filament but even that fails. It was unloading quite a bit but it seems the last centimeters it cannot get it out...
PTFE tubes - I tried to remove them and in order to see if there is an issue but honestly I think they are perfectly fine stuck in there and if I try to pull them out I might cause even more damage...
So right now I am pretty disappointed with a non printing 3d printer. What's the best to do in this situation? Remove the nozzle, try to get filament out without a nozzle at all? How would I check the PTFE tubing if I am not even sure how to remove it from the hotend etc (there also seem to be hooks the should prevent the ptfe tubes from moving, so I think it's just made to be stuck in once and never removed, right?)/
Any help is really appreciated, right now it looks like I got a big chunk of metal/cables on my table. Not sure where to go from here...
So the solution was in cura the g-code flavor. By my mistake it was in marlin volumetric. When i change this in marlin everything was better. Thank you everyone for your answers.
I was also having this issue. My printer would stop pushing filament through during the print. In my case, my hotend became clogged. The first thing I tried was doing a dry pull to try and get the clogged filament out. To do a dry pull, heat the nozzle up to 200C and then push filament through until your extruder clicks (which means that it can't push anymore filament through). Then cool down your hotend to around 120C. Once it's cooled, unscrew the nozzle with your pliers. The filament should be warm enough that it stretches when the nozzle is unscrewed and if you pull the nozzle down with your pliers once it's unscrewed, the filament should eventually come right out of the nozzle if it was stuck. I also had to use some Micro PCB Drill bits (0.1, 0.15, 0.2, 0.25, and 0.3mm) and hand pushing them through the tip of the nozzle to clean out any junk that may be in the way as well (You can buy these on Amazon).
Hope this helps.
I will try to use a different sized nozzle. Maybe the 0.3 was faulty or clogged due to being packaged with other parts. Although it's really a bit strange. I got the printer to start the first 1-2 mm of layers very nicely, see the picture, but then it started to not push filament through the nozzle. Why? What causes this mid-print?
With 200degC I had the same issue. It started to print nicely and then I saw not enough filament is coming out. The extruder also "cracks"from time to time - the filament cannot be pressed fast enough into the ptfe tube and through the hotend. I increased the temp to 215 during the build and that solved it for that moment.
Was the PTFE tubing pushed all the way into the Hotend, it should go in by about 6CM.