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This is a minimal Mendel X carriage with a large central opening. It is meant to be a drop in replacement for the standard Sells Mendel carriage. With a bit of work I'm sure it could work just fine on a Prusa Mendel.
Importantly, this design uses bearings, so you either need to salvage them from your current carriage or have 9 extras on hand.
This design has a number of key advantages: it is quick to print and assemble; it is light; ; it has a huge central opening to accommodate many hot end designs plus insulation and/or fan; No captive nuts; Easy access to extruder mounting points; it can 'clip' on and off of the x axis rails and belt.
Edit: I should mention that there are only the two compatible mounting holes, and that they are perpendicular to the regular x carriage. This is so you can mount a wades extruder sideways. There are other holes, as you can see in the renders, but they aren't in the same place as the regular carriage (at least i didn't design it to be, maybe i got lucky)
Also check out the the Y carriage redesign: http://www.thingiverse.com/thing:6641
Go here for instructions: http://reprap.org/wiki/OpenX
There are also some part variations on the bottom of the wiki page that some of you might be interested in.
OpenX Carriage by Buback is licensed under the GNU - LGPL license.
So what's this mean?
We're sure Buback would love to see what you've printed - take a photo and share it on Thingiverse as a Make.
To post a Make simply visit this Thing again and click I Made One to start uploading your photo. You can also download the Thingiverse Mobile app (available via Google Play and Apple App Store) to take a photo and upload your Make right from the app!