We've been experimenting with a water-cooled head. Our fan-cooled heads are, we reckon, one of the best designs out there, having a very short melt zone and high-power to respond to changes in load. But the fan is slightly bulky.
This is much lighter and more compact, and the cooling is more efficient. It consists of a brass block that replaces our normal aluminium cooling block that attaches to the fan. The brass has water channels drilled in it, and some soft silicone tubing connecting it to a small 12V gear pump. The inflow and outflow temperatures are only a fraction of a degree different, meaning that multiple heads could be chained in series and all cooled by the same flow.
Here's a vid:
RepRapPro Hot end improvements We've recently made quite a few changes ... Read MoreFirmware and Github updates
Since the release of the TriColour and Colour enhancement kits, the RepRapPro ... Read MoreIdeas on RepRap Printing Graphene
A recent paper on laying down graphene for making capacitors by El Cady et al. is very ... Read MoreMore Blog Entries