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kafarn

GEEETech MK8 Printhead Fan Shroud (compact)

by kafarn Apr 26, 2015
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This is NOT for a actual Geeetech printer you have a MODED! Extruder mount!

As I previously noted below in previous comments for this item/post - the original Geeetech print head mount that came with my Geeetech Prusa I3 was a printed piece, and during long prints would get hot enough that the mount would become soft and bend down from the weight of the print head, changing alignment and height positions (this is a common problem that is well discussed on Geeetech's own forum) I recommended that if you own a Geeetech Prusa i3 that uses this printed piece that you exchange it for a piece of aluminum L-channel to avoid this unstable problem from the stock Geeetech print head mount - also note Geeetech may change their design at any time and what I received could be different that what you received.

The X-carriage piece that is also a printed piece from Geeetech is stock on my Prusa i3 and has not been modified - except that I added an additional print to the top of the Geeetech X-carriage as it did not engage my X-stop in the stock format (see my other items if this would help you)

Also note it is very important that if you use this design that the cooling fins from the aluminum heat sink square off of your print head run in a vertical and not a horizontal orientation - I have another design (version 3) that works if the print head heat sink has the fins in a horizontal orientation.

NOPE I don't have a single part from them was printed they were ALL acrylic.

Most of my frame parts were acrylic - hence the name "Geeetech Prusa i3 Acrylic" (mine was clear, they also have a black acrylic version) - it was laser cut from about 1/4" thick acrylic panels (actually metric) - but the shaped pieces (Y lift supports, X-axis bearing support, etc.,) came from printed PLA, my complex shaped parts were blue printed PLA, and the remainder of the spool was included with my printer - I used it to make additional parts that matched my blue printer parts from Geeetech.

Early versions were printed. Since then they moved to Metal - this cooler does not fit my i3 acryllic either as there is no room behind cooler.

A 2nd thing that is changed is that the fins are horisontal on later versions thus this cooler will block all vents

Please look at other (later) versions I did of this cooler - shows mount solutions and v3 works with horizontal or vertical heat sink fins.

Then your printer is a modified version from what I received from Geeetech - my print head mount was printed (PLA - not even ABS)

The simple piece of aluminum L-channel I used for my print head mount has worked flawlessly - and I would recommend it to avoid heat flexing -

I wish you success as you customize and upgrade your printer - please share your successes and failures with the community so we can all learn from each other's experiences.

Do you happen to have one for heatsink that are horizontal? I would really appreciate.

I redesigned it to work with cooling fins running horizontal or vertical in version 3 - hope this helps

I have the Geetech Prusa I3B Pro and it looks like this this will work with it. I also have a MK8 extruder but the I3B extruder setup looks different than yours.

He made his own X carriage so this this is NOT original and won't fit unless you mod it also!

Actually the X-carriage on my Prusa i3 is stock (unmodified) - the print head mount was exchanged as the stock Geeetech print head mount is a common failure point (see other comments on this post) - to assist others avoid the same problems I had and were common (see Geeetech's forum - they have a thread for print head mounts warping), I added additional photos to assist others in duplicating the simple Aluminum L-bracket print head mount - hope this helps

Comments deleted.

Quite interesting way to design this thing, too bad I can't use it even if i own the same printer. For some reason, I have a plastic part supporting the extruder that prevent me to print this design as it is now. Could you add photos with different angles ? Below the extruder ?
It seems you're using some metal part to support the extruder ?

I also had the original GEEETech PLA printhead mount, but it started to warp/bend down due to the heat from the printhead itself and wasn't at a right angle to the X-axis slide mount (a common problem if you review the GEEETech forum) so I replaced it with a piece of L- bracket aluminum - I'll check the dimensions and can send you a copy of the layout if you'd like - the aluminum L-bracket has worked very nice and has improved my print quality. Also I just printed an update to this fan duct last night, this time with 4 LED's embedded so I can light up the view of my print vs looking for a flashlight - will post it as soon as I can install it and confirm that it works well.

Totally interested ! By both : the layout for your aluminium L-bracket, and the fan duct led upgrade !
Thank you for sharing this.

posted some additional photos - see printhead fan shroud 2.0 for additional angles of the aluminum L bracket I used

mediaklan: The extruded aluminum L-bracket I used is an 1.5" x 2.0" x 3/16" cut to 2.0" long, then the corners and edges were rounded and smoothed. Feel free to contact me via email (see my profile) and I'll send you pics. I'll post the lighted version (STL file) soon.

I would love the pictures also as I have the same issue Mediaklan has.

Will do - give me a day or two (buried with other projects)