MPMD Double Fan Part Cooler by ksihota

Last crawled date: 3 years, 8 months ago

This is a rebuild of my original Part Cooling fan setup for the MPMD.
UPDATE21/12/2020
I have added a few extra pictures to show how close some of the parts are and to show how to adjust the nozzle position in order to allow the vents to clear the block/sock.
I loosened the nozzle (while hot) so it extended about 8.5mm and then hand tightened the throat to the nozzle. Then with the block heated I tightened the nozzle with a wrench. This should allow the nozzle to clear the base of the vent and allow the air flow to clear the block.
You can also see the small piece of capricorn at the top of the throat which is inserted to close off any extra space in that area.
SUMMARY
The main component is a replacement part for the heat sink casing. It has no closed backing so the heatsink can be removed with the heater and thermistor still attached to the hot end. It also has a hexagonal opening at the top that holds the bowden connector firmly in place. I made the casing slightly larger than the heat sink in order to provide a better cooling flow around the heatsink.
The front fan shroud has to be replaced as I did not include the ears on the casing to hold the fan spring clip (which I did not like.) Instead, the new shroud is attached to the casing using 2 short M3 machine screws.
The front fan no longer provides part cooling unless you add the triple lower vent manifold. The lower vent redirects the air from the shroud to the nozzle. The front shroud includes a slider that allows the air flow to be redirected away from the printed part if required.
The Triple Lower Vent attaches from the bottom using 3-M3 countersunk machine screws. Because the vent adds some height, the nozzle on the printer may need to be lowered in order to clear the bottom. I use a small piece of capricorn inside the larger PTFE to extend the distance.
The triple vent allows part cooling around the whole nozzle. In order to take full advantage you need to add the Side Fans Manifold.
The Side Fans Manifold holds 2-4010 duct fans. These are attached to the manifold and then the manifold is placed around the casing and fastened using the back screw hole in the effector plate and lower vent manifold.
In order to work properly these two fans need to be joined with a Y connector and attached to the upper cooling fan wire. The front fan needs to be rewired to its own 12v line. The 12v line that feeds the lower fan can be used for this purpose.
To control the fans using your slicer and GCode, you need to upgrade your firmware to Marlin.