Geeetech

Hello there,

I have an Geetech i3 Pro B 3D Printer and I can´t retract.
I use Cura as an Slicer Software and even when I use 1mm retraction distance it jams and the filament is bigger at the end.
I have tried plenty of things, bit nothing helps.
Even the recommended settings(3mm at 40mm/s) doesnt work.

What can I do?

Hi Bugsia,
Without knowing the details - as you've not given us the material you're using, temps or print speed...
I'll have a guess at where I'd start looking.
1) I'd look at the nozzle/throat tube interface...
Is there a gap between the throat tube and nozzle inside the heater block ? - They should be tight together.
2) Is there any heat damage to the PTFE tube at the end of the throat tube (Close to the nozzle) ?
- That would also cause the same problem as point (1)
3) Is the hotend cooling fan working correctly ? - That's the fan that runs constantly at the side of the extruder.
Label should not be visible - ie towards the heatsink.
(Failure here would allow heat to travel up the filament -'Creep' and the filament could swell and jam.)
Try lifting the nozzle and controlling manually.
Can you extrude and retract in cycles whilst the nozzle if lifted ? (You could use Repetier to try this)
Gerry

I print at 195 degrees celcius and use the grey Pla of geeetech.
My Layer Higth is 0.2mm and I print at 40 mm/s.
And I doesnt have any fan for the hotend, as it also wasnt with the printer.
The PFTE Tube is new and they are tigth together.

Hi!

Try to up the temp to 200, for retraction I have put 2mm and 40 mm/s.

Best regards.

Thank you, but it didn´t worked.

I tested today to slice and print it with Repetier Host(Slic3r) and the preset file that you can download.
With that settings I can retract, so it doesnt jam up.
I will try to get it work with Slice3r, but I would prefer Cura.
Do I have to change some other settings in Cura?

Whit this printer I use Repetier with Slic3r, with cura I have many troubles and returned to repetier+slic3r.

Best regards.

Okay, thank you for the information.

I just did some testing and it still doesn´t really works.
It would be really nice, if you could send me your settings in Slic3r of the Print,Filament and Printer.

Best regards.

HI!

Attached it´s my configuration for I3 Pro B, test it and say me.

Best regards.

Thank you for your Config File.

I did some testing and it didnt really worked.
Because of the Retraction the Filament gets pulled longer in the Throat Tube and the extruder beginns to skip an click.

Should I maybe get an better throat tube with an better heat break. rigth now I have some off Amazon, because my original ones broke.
Here the link to my current throat tube: https://www.amazon.de/dp/B06XD3ZK6T/ref ... UTF8&psc=1

Probably the PTFE tube inside the barrel it´s KO.

Any other thing say.

Best regards.