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Changing filament E3DV6

Posted by wgaona 
Changing filament E3DV6
March 31, 2016 02:13AM
I had been changing the filament or changing the nozzles in my E3D-v6 Hot end without problems.
Nevertheless, In the last changes I have experienced obstructions with filament waste
between the Wades block and the Hod end in the step of extracting the filament.

After some tests, varying temperature (185-230), or velocity of reverse extrusion (50-150 mm/min)
I found that a critical factor was the velocity. At 50 mm/min I can extract the filament without any filament
remaining besides the extracted filament with the form that is shown in the attached picture.

If anyone have other values, parameters or procedures to change filament or nozzles, I would appreciate to know about them.
Thanks for reading
open | download - DSC_0980.png (483.7 KB)
Re: Changing filament E3DV6
March 31, 2016 04:00AM
If it is PLA you could try a cold pull at 70-80C. That is below the melt point but above the glass transition, so it should come out in one piece leaving the barrel completely empty. Having said that I haven't tried it with E3D.

I have never noticed the speed being critical.

Re: Changing filament E3DV6
March 31, 2016 09:59AM
Yes, it is PLA. Thanks for the suggestion I would try it.
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