This is an enclosure for the Duet board and the power PCB of the Ormerod 1, to be mounted on the back of the printer similar to how it sits on the Ormerod 2. It screws into the Y aluminium extrusion just as the power PCB does originally, and there is an additional top mount that goes into the Z extrusion.
It is based on the existing enclosures from
bobtidey and
dc42. It still has dc42's code for stacking it with the DueX4 expansion and it should still fit, but I haven't tried it as I do not have the expansion board.
Various build notes, should you want to print this yourself:
- I had to run the STL file from OpenSCAD through netfabb to repair it, or Slic3r would misread it badly. The supplied STL is the repaired one, but if you render it yourself it will probably need fixing.
- When mounting the Duet like this, the cables to the Y and Z motors and endstop switch will be too short. What I did was use the Y motor loom for the Z motor, and cut up and extended the old Z loom (as well as new endstop switch cables) to fit the Y motor. I have the Y motor mounted on the other end of the Y axis (as on the Ormerod 2), but the same recipe will work with the normal Y motor position.
- I used the original nuts, bolts and washers for mounting the enclosure to the duet. The only exception is the top one which I replaced with a shorter screw, the original one requires one or two washers as it will otherwise hit the inside of the aluminium extrusion.
- After mounting, make sure your Z and Y carriages move freely. The top mount should provide clearance for the Z runner even with no washers. Depending on how your bed is set up, it might hit the two bottom screws for the Duet. I have a higher-than-normal bed and designed it to just fit. If it is still too low, increase enclosure_spacing in OpenSCAD. If Y still hits, you save a couple millimeters by not using the acrylic cover, in which case you might want to have a solid bottom (see below).
- The enclosure itself is rather flexible and gets rigity from the acrylic bottom cover and the Duet. If you don't like this, set Enc_hollowbase to false or add some braces. You can also increase Enc_wall a bit (I use 2.5, original is 3.0).
- I used solid-core 2.5mm2 electric installation cable for feeding +12V to the duet. It is quite rigid and is just bent into the right shape. There are also a couple of short jumper cables to connect +5VSB and PSU_ON.
- I replaced the ribbon cable for the bed heater with flexible silicon-insulated 14AWG (about 2mm2) cables, soldered straight to the Duet as well as the bed heater (with 3mm bullet connectors in the middle, can be seen in one of the pictures). The original ribbon cable should still work but it would have to be folded differently and can no longer be attached to the Y end plates as it is too short.
- The top vents on the original enclosure have been disabled as they are now the side vents.
- The sizes of the various cable cutouts have been increased. I found the SD card slot very small and hard to get to, and most of my micro-USB cables had connectors that would hit the enclosure. This meant the sidewall between the holes is now very thin and easily breaks off. Looks good without them anyway, and they still serve as bridge supports when printing.
- I have added a hole on the top next to the USB port for a reset pushbutton, since the one on the board is tricky to reach. I wired that to the reset and ground pins on the expansion header. If you don't want it you can disable the hole in OpenSCAD.
- There is a hole for a cable tie in the top mount, as well as a zip-tie loop near the bottom. I tied the "stationary cables" (Y and Z motors) to the bottom one and all the "moving cables" going to the Z arm to the top one. Looks neat and moves freely with Z axis. The cable tie things can easily be disabled though.
The enclosure with the two boards in it, as well as reset button, power and bed heat cables.
From either side when mounted on the printer.
More pictures on
Thingiverse.
Attachments:
open |
download -
rear-mount-duet-enclosure.scad
(20.8 KB)
open |
download -
rear-mount-duet-enclosure.stl
(531.5 KB)