Re: RepRap 3DR Delta printer Released

today I contacted the tech support at RRW and they have suggested to try a manual extrusion with just the heating block. I started cleaning the hot end by heating it up to 230° and then pushing out all the filament using compressed air: at 6 bars the pressure could barely push out the residue, something like 1mm of extrusion every 5 seconds. yesterday I did the same thing with a J-HEAD from NOPHEAD's kit and it just blew all the residue plastics out in a matter of 10 seconds. indeed the printer works much better with NOPHEAD's j-head, so I think there is indeed something different between the 2. the explanation of the longer nozzle makes sense, as from what I read on this forum, the longer calibrated diameter makes it for less die swell, at the expenses of a higher extrusion force.
indeed I remeasured the extruded thread and found to be 0.5-0.51mm... today at work I also measured the nozzle, and found it to be 0.498, so die swell is really limited.
to reduce the nozzle length I could use a 2mm drill bit to shorten the 0.5mm hole to about 0.5mm, but I believe the risk of passing on the other side is high.

on the other hand I have a cart at E3D webstor filled with 1 kit, 2 extra nozzles and a spare heat barrier, just waiting to click enter.... its more that £100 and I'm a little reluctant to spend all that money for an hot end, but I'm really tempted...

by the way, If anyone is interested, here a video of the auto bed levelling with FSR...
[www.youtube.com]