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Lm8uu quick release carriage for Prusa Mendel by Lanthan is licensed under the Creative Commons - GNU GPL license.
© 2011 by Lanthan
Instructions
Adopted solution uses 5.7 mm routed plywood and six 8mm diam x 6 mm high cylindric magnets (if you are paranoid you can get heat-resistant versions on eBay at little price difference), three per plate. Magnets are fixed with cyanoacrylate glue before the epoxy treatment. Plywood was soaked in marine epoxy and allowed to cure, the surface is very resistant. Boltheads are used to secure position with corresponding holes in the upper plates. While the holding force provided by the magnets is pretty strong, "just in case" I left also two holes for pass-through bolts. I used three of GregFrost's LM8UU holders not bolted (IMHO bolting defeats the whole purpose of gluing), but epoxied to the carriage according to standard procedure.
The zip ties were pre-positioned then tightened before the curing process. The upper carriage features "standard" GregFrost's fixations. Just add quick connectors to the extruder, and (hopefully) you'll be able to change the whole upper plate-extruder block in less than a minute.
