SHT36v3 Electronics Bay Mount for Sovol Zero
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A simple mount for a 36mm toolhead board for the rear electronics bay of a Sovol Zero
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I added a 100W chamber heater to my Sovol Zero, which ended up becoming a little bit of a project.
I needed to be able to control the 12V fans and heater element, and didn't have enough spare ports on the mainboard, so I used a Fly SHT36v3 toolhead board, which gave me a 12V rail for the fans (a little bit underpowered, but enough for my purposes), plenty of IO for controlling the fans via PWM and attaching a temperature probe, and a heater output that was well-sized for the task.
This should fit any other toolhead board that uses the same hole pattern (ie. meant to mount behind a round 36mm NEMA 14 motor). So, EBB36, Nitehawk-36, etc.
For the mount itself: the STL is oriented correctly for printing, and you should choose a filament that can take a bit of heat (this is right up against the chamber, after all). Add an M3 heatset insert to the right side of the mount (the larger wide-open end of the mount). Attach the mount to the back wall of the electronics enclosure with a countersunk M3 self-tapping screw in the middle of the mount, then attach the toolhead board to the mount with an M3-self-tapping screw on the left and a normal M3 screw on the right.
Be careful with the self-tapping screws; don't be afraid to stop what you're doing and ream the holes out a bit with an appropriate-sized drill bit, rather than wind up cracking the plastic. The mount has a shroud over those back wall mounts specifically to try and make that less likely, but if there's not enough room, well...
For wiring, in case anyone else wants to do what I mounted this up for:
CANH/CANL from the toolhead board to the spare CAN port on the mainboard (either the XT30 2+2 port up top, or the JST PH plug below it on the board)
24V +/- from the PSU directly to the toolhead board (XT30 port on top)
Heater +/- from the PTC heater to the heater port (GPIO23)
Fan jumpers set to 12V, with + coming from FAN1, and - and PWM coming from the RGB port (GPIO26)
Temperature sensor connected to TEMP (GPIO27)
I'll leave the klipper configuration as an exercise to the reader; this is probably not the project you should start out with if you want to learn about flashing klipper/kalico, CAN device IDs, etc.