Here is a question for Nophead, although someone else may have the answer as well. I was looking at your latest blog posts about your new extruder design [hydraraptor.blogspot.com] and I was wondering why you have your nozzle so far from the heater area? Wouldn't be better to have the actual nozzle as close as possible to the heater area? Thanks, Jeremy https://reprap.org/forum/read.php?1,21514,21514#msg-21514 Thu, 16 Jul 2026 03:45:46 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,21514,21515#msg-21515 https://reprap.org/forum/read.php?1,21514,21515#msg-21515
I don't think they cause any problems. In fact I used the brass one (made by Adrian!) for a long time and it worked well, so I concentrate on changing bits that I have had problems with.

There may be some temperature drop but the aluminium should improve that. Also a bit more length to push viscous plastic through, but as it is 3.5mm bore it should be little resistance compared to the exit hole.

The copper welding tips I have to try next are longer but they will shorten the path because they screw into the heater instead of the other way round. If they work I will switch to those as they are much easier than making one from scratch.

The original extruder design worked fine for me but kept breaking down. My motivation for changing the design is to make it last longer, and if possible easier to make.]]> nophead General Mon, 16 Feb 2009 17:53:58 -0500 https://reprap.org/forum/read.php?1,21514,21514#msg-21514 https://reprap.org/forum/read.php?1,21514,21514#msg-21514 hydraraptor.blogspot.com] and I was wondering why you have your nozzle so far from the heater area? Wouldn't be better to have the actual nozzle as close as possible to the heater area?

Thanks,

Jeremy]]> cptwinder General Mon, 16 Feb 2009 17:01:19 -0500