Prusa MK3 Camera Bed Mount Arm

thingiverse

UPDATE 9-12-18: It's been pointed out that the design is no longer compatible with the MK3's B7/R3 extruder update, which tilts the front fan at an angle. This prevents the camera arm from clearing the fan when the bed moves all the way to the rear. I've added 20mm to the length of the arm to ensure it clears the newly tilted fan after the R3/B7 extruder update. However, I'm no longer using this assembly myself, so someone will need to print and test it. Please let me know if it successfully clears the fan or if more length is needed. UPDATE 2-10-18: A correction has been made to the RIGHT side mount, which needed a bit more clearance due to the asymmetrical design of the right side bed frame. UPDATE: I've added separate STL files for the LEFT and RIGHT sides (the right side option is more convenient as it doesn't obstruct the SD card slot like the left side does). Please note that I won't be working on this project further, as it was a quick fix for me. I've moved on to designing a new accessory rail. ===================== This is a remix of robsgarcia's previous MK2 version, which itself is a remix of CNCKitchen's "Prusa Camera Bed Mount - Higher Arm" and the original by PrintCentral. I've modified this mount arm specifically for the brand-new PRUSA MK3 bed (released November 2017). There are many older versions of this style of mount arm on Thingiverse, but none actually fit the MK3 chassis. Several adjustments were necessary to accommodate the new design. First, the width of the bed chassis arm of the MK2 is only ~10mm, whereas the width of the arm of the new MK3 chassis is 12.3mm. So I widened the inner channel in this version to 12.33mm for a snug fit on my MK3 bed rail. The prints made on my MK3 fit so tightly that they don't seem to need the screw called for by the original design. Instead, I've added two recessed zip tie slots across the bottom, which help guide the installation of a zip tie on each side of the silver spacer/post. After securing these with great force, the part seems solid enough. I also significantly shortened the section connecting to the bed to avoid interfering with the Y-axis rod and zip tie. Then I lengthened the middle section of the arm so that the extruder won't crash into the camera when the bed moves all the way to the back and the extruder is low. The version of the Pi camera enclosure used is this one by hackoholic, which allows the ribbon cable to exit the bottom instead of the top: https://www.thingiverse.com/thing:2352964 Thanks to all the original designers and remixers.