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Mk7 replacement with cooling fan
by hansj66, published
The design files for this thing have been removed as a protest against Stratasys after their decision to file a patent infringement lawsuit against Microboards Technology. Their decision is extremely destructive and also underlines that the patent system is obsolete as it no longer serves any purpose for the betterment of society. Its main role is as a blunt weapon used by incumbents to hamper innovation. I see absolutely no reason to continue indirectly supporting Stratasys by providing free content to Thingiverse.
After printing with ABS for a year, I decided to give PLA a try. The extruder nozzle clogged on almost every print, so I decided to attempt to add some additional cooling.
Remove the thin support material on part 2 and mount a ball bearing with an inner diameter of 4mm. You may have to cut the screw that holds the bearing in place to avoid making contact with the stepper motor or heat sink.
Spring dimension is probably not critical. The spring I used is 8 mm in diameter and 35 mm long.
The fan is a standard PC power supply fan.
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Mk7 replacement with cooling fan by hansj66 is licensed under the Creative Commons - Attribution license.
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