February 17, 2019
Description
Update 5/13/19: Created a version with the MK3S cutout door on a request.
Update 5/14/19: I have about 5,000 total hours against this design on 16 machines, so far no issues of any kind. I think this problem can be marked off as solved.
This is a mashup of the original MK3S einsy case, piZero door access, and y-axis cable chain mods.
Attribution/Credit:
Y-Axis Chain: https://www.thingiverse.com/thing:3019978 by ad_lamy
PiDoor: https://www.thingiverse.com/thing:2757901 by bubu77
MK3S Case & Heated Bed Mount: https://www.prusa3d.com/prusa-i3-printable-parts/ by Prusa Research
I've rolled in the latest changes to the case from Prusa as of 2/17/19 as well as the new screw-terminal based heated bed cable mount.
Heated Bed Mount: Use the soldered version if you have the old single screw mount and soldered bed heater terminals. Use the MK3S version if you have the new screw-on terminals. I believe the new MK3S version will work as well with the old soldered terminals.
13 links are needed in addition to the heatbed chain link.
I have 16 Prusa i3 MK3 printers, and with my aging workforce the textile sleeve and spiral wrap for the Y axis doesn't do a good job of protecting the heatbed cables from strain failures. I'm seeing mintemp and thermal runaway failures right around 3,500 hours on the machines, with 2 failures so far.
I'm ditching the wraps and sleeves for a cable chain on this axis only.
This prints well and cheap in Hatchbox PLA, and all parts print without supports. You'll need 2 x M3S nuts and 2 x 5mm screws from the spares bag to roll in the X axis cable retainer.
Print at .2mm layer height and 20% infill.
GCODE:
Pi Case Modified with Chain Rev A (P3) 7h 90g Bed ON.gcode - old style solder mount
MK3S Pi Case Modified with Chain Rev A (P3) 7h 90g Bed ON.gcode - new style screw terminals
I've uploaded the batch file for prusa control, the whole mod prints in 2 batches: 1 for 99% of the parts, and 1 for the clip-in door if you want to use it.
License:
Creative Commons - Attribution