CR-10s MGN12H Linear rail carrige
Description
Work in progress on a MGN12H carriage for X-axis on a CR-10s (and probably CR-10 / Ender 3(?) or those that use the same x-carriage) Status updates: 2019-06-06: First test printed.. - Fits my no-name MGN12H quite nice. - Fits both the stock and Swiss Micro hotends quite nice. NOTES: Adjustments made in V11 (not printed yet) - Belt-retainer was not in the correct position in my test-print so this has been adjusted. - Clearance to the hotend was a bit small for my liking so this has been adjusted - Modified so the hotend will use brass-inserts instead of plain thru-holes. - Added holes to the corners that will be used later on for the cooler and other accessories. 2019-06-04: Made some progress and uploaded a preview: 'Base carrige PREVIEW.stl' Moving closer to stripping down the carrige.. Dimensions should be fairly close to what they need to be and where the belt-retainer will be located there is a cutout at the moment. Feel free to comment your thoughts and ideas or things that might become problems.. iNITIAL INFO: It will eat up a bit of the Y build area (~10mm) with the current design unless you adjust your Y-stop and move your build-area a bit forward. Goal is to have a sturdy carriage that can slot in and replace the metal carriage without any other modifications or hardware, except for some screws/bolts/inserts and mounting a linear rail on the X-axis 2020 profile. Fairly thick carriage but the intention is to use a low infill amount but fairly stiff walls and use it like a torsion box. This does require the hotend temperature to be dialed in for the material to allow for a maximum bond between layers. ** Todo's ** - Make sure the belt-slots can be used OR switch to a "real" belt-retainer brackets on each side. - Make sure the bullseye can fit or make a custom adapter for it or some similar design. The idea is to go with a torsion-box design (low amount of infill, but thick walls) to keep the weight low but have it fairly stiff at the expense of maximum strength. My plan is to use PETG/carbonfibre to limit the amount of warping/shrinking to a minimum and have a fairly strong part. Probably doable in PLA too, especially if you anneal it, but watch out for the warping/shrinking. Big thanks to https://www.thingiverse.com/thing:2789191 for a drawing of the original carriage. Hope all the dimensions are correct :)
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