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Reinforced Prusa X Carriage with Slim LM8UU Holder

by jonaskuehling, published

Reinforced Prusa X Carriage with Slim LM8UU Holder by jonaskuehling Mar 6, 2012

Description

This is a reinforced Version of Simon's x carriage based on my slim LM8UU holders.

I basically changed the following:
* Beefed up the LM8UU clamps to 3mm wall thickness for better strength
* Added extra support braces for stiffer frame, also between the belt clamps to allow more belt tightness without twisting the clamps or the whole carriage
* Applied two fan mounts for multi-purpose fan or equipment installation (tiltable fan duct, LED ring light, etc.). Dimensions of mounting blocks are 10x10x15mm with hole for M3 screw right in the middle..

Recent Comments

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Will this work with an E3D v6 and your Gregs Wade reloaded?
I need a 40mm fan DUCT for this carriage and a Budaschnozzle (2.0C). Before I go designing one, has anyone else actually done that? I'd likely mash-up some existing duct and the mount holes for this carriage. (I've been using 66216 with other extruders but with the Budaschnozzle it's not going to be as easy to insulate the hotend just to shield it from the air).
I used Igus bushings with a 10mm rod, which has the same outer diameter as the LM8UU.
Just realized when installing that there is a clearance issue with the belt clamps mounts.
It fits but the friction is too high. Will remove a bit of material and try again

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Instructions

Slice, Print. 25% infill is just fine.

I'm using slic3r with 25% rectangular infill at 45 degrees, 3 perimeters, 3 solid layers, 0.25mm layer height and 0.35mm nozzle.
Will this work with an E3D v6 and your Gregs Wade reloaded?
Aug 24, 2014 - Modified Aug 25, 2014
I need a 40mm fan DUCT for this carriage and a Budaschnozzle (2.0C). Before I go designing one, has anyone else actually done that? I'd likely mash-up some existing duct and the mount holes for this carriage. (I've been using 66216 with other extruders but with the Budaschnozzle it's not going to be as easy to insulate the hotend just to shield it from the air).
I used Igus bushings with a 10mm rod, which has the same outer diameter as the LM8UU.
Just realized when installing that there is a clearance issue with the belt clamps mounts.
It fits but the friction is too high. Will remove a bit of material and try again
Does anyone have this for LM10UU?
OKay, got it coming out perfectly, guess what? During first hotend heatup.. One of the holders broke. Could someone please make a version with better bearing holders?

Now this is the fifth time I have to make a new carriage hihihi.
I keep running into trouble at layer 7, I am printing it at 0.4mm layer height with a 0.5mm nozzle.

Am I doing something wrong? Layer 7 keeps letting go, while all the other layers print perfectly!
Damn, great carriage! But the ABS print is not sticking to the Kapton all of a sudden..

Will reprint tomorrow at even higher heatbed temperature..

Wish me luck :)
If you guys are still looking for a fan mount, I made a simple one that fits this carriage, you can find it here : thingiverse.com/thing:66216
Hi! thanks for the great design.
I have 2 questions:

1) can you share your fan holder?
2) how do you tension the belt?; there´s little room between the belt fixation points to be able to tension the belt with a screw. 
How does one print this without brittle bearing holders? I tried using 2 types of ABS and increasing the temperature but one holder snapped when I gently pushed the bearing in and another before I got to tightening the screw...

It feels like print orientation of the bearing clamp is wrong as putting up stress in the laminar direction already seemed like a bad idea - or am I missing something?
Use PLA! That, or try turning up the infill. Maybe use zipties instead of screws?
I don't use PLA anymore, perhaps I can try that once I get a new batch of fillament. I tried using infill from .15 to .85, nothing helped. I resorted to zipties but if the holder wasn't broken before, it would snap when the ziptie was tightened... I resorted to designing my own holder instead...
I pray to you share your fan duct for this carriage, at least one of the versions! :)
Those fan mount look like they work pretty good. Do you have the stl files so we could print those?
This is currently printing on my reprap. A much needed replacement of my x cairage with 3 lm8uu's that "tilts". at 50% of the print it is warping like hell but somehow sticks. Will post photos after install if this print finishes (fingers crossed)

Anyway thanx for the design!
Could you share your design for the tiltable fan ducts that attach to this carriage?
Can you add another fan mount to the front of the carriage? I have a fan that is a little too big and takes up too much of my x-axis room. Also it would be handy for mounting a dial indicator for bed leveling.
Thanks for your great work, Jonas. I'm just printing for a few weeks now but already printing the first two printers for friends. After using your X-Ends and your extruder i found this one which is simply great. Do you have any of the attachable utilities yet? I'd love to see them. I'd most probably do my own but having inspiration from how you thought they should be used would be great. 8-)
Thanks a lot - actually I made several attachements yet, mostly fan ducts which developed faster than I could have published them all to thingiverse.... Didn't find the time for uploading at least one of the temporarily final versions, but it's still part of my to do list ;)

My current dual fan composition can be seen on the photos of my latest blog post ( jonaskuehling.de/2012/03/28/incredible-results-with-sandblasted-glass/ ) for a first impression.
Hello can you tell me where I can get the files from the fans that have photos in the photo of the ceiling.

You have two to your cart X.

Thank you.
great, thanks. your ducted air systems look really interesting. Would love to hear more about your experiences with that - probably over at the german rro forums?

I wonder if you ever managed to get an LED ring light down there togetgher with one or two fans. just thinking about how to manage that as i got my ring ligts from ebay yesterday.
Thanks for your great work, Jonas. I'm just printing for a few weeks now but already printing the first two printers for friends. After using your X-Ends and your extruder i found this one which is simply great. Do you have any of the attachable utilities yet? I'd love to see them. I'd most probably do my own but having inspiration from how you thought they should be used would be great. 8-)
Thanks for strengthening this part! I prefer it over the standard prusa x-carriage but it needed to be stronger.
I could just as easily like your work for the photography alone.
Thanks, that's great!
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