DepotCube CoreXY - prusa i2 parts

cults3d

This is my attempt at maximizing the build envelope of a 3D printer using most of the hardware from a prusa (mine is an I2) ie smooth rods, bearings, threaded rod etc. This has roughly 268x290x260 (200x200 on the x and y if using standard bed) working area using the prusa I2 hardware and can be scaled to what ever size needed based on the smooth rods used (within reason 8mm rods can only be so long). It has a cantilevered z-axis with a counter balance load design that moves with the z-axis. It is a coreXY non crossing belt design, meaning it has two separate equal length belts and cause no wear from odd angles on the belt. Bowden design, and I will be uploading the dwg files for the wooden case I'm making for it for an enclosed chamber. X-axis and z-axis endstop mounts are integrated and included y axis I used this thing http://www.thingiverse.com/thing:71488 for the y-axis. The frame is built using common inch aluminum extrusion found at most any hardware stores and the sizes needed for a prusa hardware setup are shown in the image with the iso views in the attached pdf file. Also in one of the pdfs is how the motor mount corners are assembled, they are done this way to remove all axial force off of the motor which should mean less current is needed to drive the motor as friction is reduced. I have included the printer as an stl so its easy to look at. will require modification to two threaded rods (listed below as optional because you can have a hardware store/machine shop cut to size for you) 427mm threaded rod (mine was cut from a prusa I2 frame rod) (rear z axis) 401mm threaded rod (again cut from a prusa I2 frame rod) (front z axis) print 2 of bottom corners A and B and 1 of everything else (2 of the feed tube ball join holders if you plan on an enclosure) extra hardware needed(if you already have a prusa I2) 10 additional 608 bearing(can be found a most sports outfitter store, skate shops, ski shops etc) some m3 (or ansi equivelent) self tapers minimum 40 1/2 m8 bolts with matching nuts.(haven't counted all yet) acetone(aka abs glue) 4x 8mm bore gt2 20T pulleys(metal recommended) 2x 1650mm belts (measured at 1634 but nice to have some to pull on for tension clip) 1x 102mm length GT2 51T closed loop belt.(can be diy sown but easier to buy) Otpional(if you don't want or can't cut the m8 threaded rods) 427mm threaded rod (mine was cut from a prusa I2 frame rod) (rear z axis) 401mm threaded rod (again cut from a prusa I2 frame rod) (front z axis) UPDATES 11/10/15 updated all the corners(doesn't effect motor mounts or bearing holder) and z-axis parts that attach to the aluminum. I found after printing they required a lot of sanding to fit so I adjusted them to fit better. Also the bearing corners rear_corner_top_left/right have been modified to take a M8 bolt instead of the printed "rod" as it was found to not hold the tension of the two belts. 11/7/15 updated motor_corners to make it easier to fit a socket in for the motor bolts 10/30/15 Was asked for file in step, just finished uploading 10/21/15 Updated motor corners assembly to make it easy to assemble, So three parts in each corner,