Our Delta Wasp 20 40’s single extruder got blocked when the ABS filament was inside, 240C.
I tried all the methods ( needle, filament push&pull, metal stick push and pull). It started to extrude thin with the next PLA print and it stopped extruding in the middle of the print. Now I cant extrude anymore even though I tried everything . The needle goes through the nozzle and I cant collect any plastic from inside anymore.
Nozzle looks pretty black. Might it be that I need to change the nozzle since it seems well wasted.
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GIFT3D
2
Hey Asya,
One way of getting rid of the plastic is by using acetone. If you get this into the nozzle it will liquify the plastic causing it to drip out, causing it to unblock. You’ll need to add this when the printer is turned off and cool, but be careful as it can be flammable and the vapours could be dangerous. I have acetone to one side which can be used in these instances. Don’t worry though if the printer heats up and makes an unusual noise, this is just the acetone vapourising.
I hope this helps you out.
Try to take the nozzle, heated block and barrel apart. This helped on my Robo3d.
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Hi
i think i had the same problem two weeks ago so i went to wasp indistries and they Tell me that was the teflon pieces before nozzle.In fact with new extruder you have To change or sometimes because it is deformed After 300-500 hours of printing.
so you just have To replace the teflon tube with a New one .
where are you from?
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Hey there,
I was not so sure about the acetone method; since the I have been using the acetone+ plastic mixture as adhesive for the print bed. I think it needs a disassembly and cleaning. But thanks anyways!
Giulio I am form Turkey originally; but now doing my masters studies in Copenhagen - Royal Danish Academy of Fine Arts / CITA. I am using the printer quiet a lot so I need to fix it as soon as possible. How can I understand if the problem is the teflon part?
Also the nozzle end looks really destroyed. Even one part of it seems like missing 
Thanks!
Can you post a photo of what you are talking about. A Teflon tube is easy to find online. I don’t know what type of hotend you have but you can probably find those online also, be careful you get the nozzle that fits your printer though! Maybe amazon.com
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It’s very strange, usually deltaWasp 20x40, one of the good things about is the manual manipulation of the filament input.
If the extruder is heated and manually pushing the filament not unclogs the nozzle, try the following:
Enter the new filament everything you can, the extruder heated to 250 ° C, and then leave it to cool when the temperature reaches 80C, stretched filament manually to remove it in one fell swoop i quickly. Normally the bulb usually get.
You will tell me
Just changing this My DeltaWasp returned as new
Inside the metal tube is also teflon/plastic tube which sometimes get damaged and start to block filament flow thru. Try to replace this teflon tube. Black nozzle means that material is burned and covered the nozzle. Just heat it up and clean with metal-brush.
Gio50
10
Purtroppo ho anch’io avuto problemi con l’ABS. Dovresti portare la temperatura dell’estrusore a 240-250° dopodichè, quando ha raggiunto la temperatura, far girare la rotellina di avanzamento del filo in modo che coli e sciolga bene i rimasugli della precedente stampa. Quando vedi uscire il filo con continuità e ben fuso uniformemente dovrebbe essere tutto ok. P.S. se necessario aumenta pure la temperatura dell’estrusore anche oltre i 250°.
Ciao, fammi sapere.
Okay, I tried all the manual methods without disassembling. When I am manually loading the filament it works perfect. But as soon as I start printing it starts to print with very thin flow - and I am using the same flow values with previous prints. - So I disassembled, there is a huge blue PLA bulk it even went put through the holes of the extruder cover, there I took some part. HOW CAN IT LEAK OUTSIDE ? Also the white material around the hot end seems destroyed. I collected some pieces of it. However I cant reach exactly the nozzle part. I am putting some photos. More help ?? 
Tttt o change the teflon piece and if it doesn’t work change the entire block
PLA is not leaking. You had some problems in printing and usually i had same problems when material started to turn around the nozzle and sticked to it. This will cause blob around the nozzle which start to push melted materials inside the open holes in extruder. After i opened extruder it was filled from inside. Try to remove this carefully, without destroing the thin wires around the nozzle heater.
This white part is not important. It is just used for fixing the nozzle to place. I have disassembled many times and many different generation of Wasp nozzles. Try to heat up the extruder and then try to unscrew the nozzle itself. It is not easy and you should hold the the part where the nozzle connects steady and try to put some soft material around it because under this are wires which are heating the nozzle. Another thing you can try is to use some 0,4 wire or needle to clean the the nozzle and to make the hole little cleaner and bigger. From picture it seems that the nozzle is deformed little bit because it has touched the printbed and moved over glass. This deformation can cause difficulties on the flow.
You mean the axis of the nozzle has shifted? Would it be solved changing the nozzle?
No, i mean that because of bad levelling the nozzle have scratched the surface of plate which will make nozzle hole smaller and start to blocking normal extrusion.
