November 17, 2015
Description
When the Dual extruder finally came out for the Taz4, I quickly realized that it was lacking a way to cool the cooling fins and the print. I've seen setups that have fans on each side but it was too bulky adding to the already bulky design. Since there was no good solution in sight, I had to come up with my own solution. The best solution was to design a whole new dual extruder; one with less mass preferably but lets not reinvent the wheel. I simply don't have time for that. The next best solution is to modify the hell out of it. There are a lot of files here. I will list all the parts and provide links to the vendors. Thanks to Lulzbot's open source policy, I can use and modify their files. However, most of the files are designed from scratch.
You can find the original file from Lulzbot here: http://devel.lulzbot.com/TAZ/accessories/dual_extruder/dual_extruder-1.0/
and here:
http://download.lulzbot.com/TAZ/4.0/
Be advised that the hotend fan has to be constantly on while the hotends are heated otherwise the dual extruder will risk a meltdown.
All materials are printed out of ABS unless specified otherwise. The file, Hose coupling, is printed out of Ninja Flex.
Hose coupling ABS
This piece connects the ribbed hose to middle hose of the duct work.
Air Divider
This piece is super glued on the bottom of the flex plate
12mm to 8mm splitter
This piece divides the ribbed hose into two smaller silicone hoses
Hose Holder
Optional
Mount Plate 02
Modified with an extra notch in the middle to accommodate the air hoses
Hardware:
8)DEFP Jig 02
Used to form the copper pipes into shape.
Instructions:
Hose coupling (Ninja Flex) (4)
Used to couple the ribbed hose to the dual extruder air duct assembly. It is printed out of Ninja Flex.
Dual Extruder Flex Plate
Modified to direct air to the cooling fins and print.
Hardware:
Duct Work 07
Direct air from the hoses to the flex plate.
Hardware:
M3 screw 8mm (4)
Fan Plate 27
This is where the fans, knobs, and switch is mounted. I've tried printing the fonts out but found out the resolution was too low for fonts. I've decided to use my CNC router to V-carve the words in and then spray paint it white. If you want the STL file with the fonts in it, let me know, I'll upload the files.
Electronics:
Neoprene Rubber self adhesive strip 3/8" wide x 1/16" thick x 33 feet long
http://www.amazon.com/gp/product/B00EE8Q83M?psc=1&redirect=true&ref_=oh_aui_detailpage_o08_s00
Copper Pipe (.25 inch in diameter)
Vendor:
License:
Creative Commons - Attribution - Non-Commercial
kendawg
