Duet3 mini5+ wifi cable chain case for Full Bear Upgrade

thingiverse

This is a case with cable chains for the Duet 3 Mini 5+ wifi board that is designed to fit onto the Prusa i3 Bear upgrade (https://www.thingiverse.com/thing:2808408) aluminium 20x20 extrusion frame using standard M5 bolts and t-nuts. The original cable chains can be found here: https://www.thingiverse.com/thing:2862375. You will need all the cable chain links from there. Note that Duet3Mini_Bear2.0_MK2.5s-Box-Chains.stl is designed specifically to fit the V2.0 frame of the Full Bear Upgrade - i.e. that is with the 311mm Y-extrusions (see https://guides.bear-lab.com/Wiki/Bear_FAQ#Section_Which_Full_Bear_frame_do_I_have). If you have the longer V2.1 frame (331mm), print the Duet3Mini_Bear2.1_MK2.5s-Box-Chains.stl instead. BOM 4x M3 hex nuts 4x M3 10mm bolts 5x M3 square nuts 2x M3 10mm bolts 3x M3 18mm bolts 3x M5 8-10mm bolts 3x M5 t-nuts I've also included a Raspberry Pi swing case that incorporates space for a 40x40mm case cooling fan if you run your Duet in SBC mode. There is a cutaway in the pi specific cover (Duet3Mini_Bear_MK2.5s_Cover_RaspberryPi.stl) to pass the ribbon cable through. If you plan on printing the raspberry pi case, print the Duet3Mini_Bear_MK2.5s_Cover_RaspberryPi.stl instead. You will also need the Pi_Hinge_revA_ORIENTED.stl and Pi_Hinge2_revA_ORIENTED.stl from https://www.thingiverse.com/thing:2862375. Unfortunately, the fan covers up the SD card slot on the pi, so you have to remove the fan to access the SD card. However, I did achieve a 10-15 degrees C reduction in MCU temperature when printing with a 12V 40x40x20mm fan powered off the Duet board. Additional BOM 4x M2.5 hex nuts 4x M2.5 8mm bolts 1x M3 square nut 1x M3 8mm nut 8x M3 hex nuts 4x M3 10mm bolts 4x M3 20mm bolts for the fan (for a 40x40x20mm fan), use shorter bolts for a 40x40x10mm fan. UPDATE: 31/05/2023 Having just tried to use a micro-USB cable, I found the PCB board is slightly too far away from the opening, and the surround prevents the cable from being fully inserted. I've modified the slot opening to allow complete access. This only affects the Duet3Mini_Bear2.0_MK2.5s-Box-Chains_V2.stl and Duet3Mini_Bear2.1_MK2.5s-Box-Chains_V2.stl files.