Ender 5 CR10 bed, Triple Z screw

Parts to add two stepper motors and 8mm shafts to an Ender 5. Originally designed to use the parts from an E-waste printer that caught fire, these are usually available for a great price used.

Non Printed parts used:

• CR10 bed and gantry plate (mine had bushings but springs are possible)
• 8mm linear rods and LM8UU short bearings
• 8mm Leadscrews and nuts
• 2 steppers with leadscrew couplers
• Extra screws and trapezoid nuts, I picked up a kit. 
• 2-1 Parallel stepper cable for Z2 plug, recommended to pair the front 2 steppers.

You will likely need a front bar relocation and foot extension of your choice if you do not use short steppers for your Z motors. Some modification may be required for springs. Go wild with it and remix as you please. I know it's not the most sensible way to do this but hopefully it helps someone else.

I MADE THIS TO ACT AS A STIFFER MORE RELIABLE PRINT SURFACE, THIS WILL NOT UNLOCK A 310x310 BED AREA.

Use a low-creep high-temperature filament like ASA, PLA will warp and ruin the alignment of this system. Models were designed to print with for Ender 5, so I have included step files if adjustments are needed for your filament shrinkage etc. 

Front Assembly:

Front Bed Arms:

The front bed arms are available as a single piece or three piece design depending on how well your printer handles warp. These receive a LM8UU bearing and a leadscrew nut of your choice of pitch. M3 button head screws lock the bearing and nut in place. I recommend using 2 Screws and leaving the nut slightly loose to allow some play.

Lower Z Support:

Acts as a mounting point for the Z rod and stepper. Uses two m5 screws with trapezoid nuts to attach to the frame, m3 screws for the motor. Included is also a stepper spacer if your shaft setup does not allow the leadscrew to sit low enough. Make sure the Z rod area sits flush against the 2040 extrusion. I recommend solid couplers, I experienced skipping issues with spring couplers here. Use the raised area around the Z rod cup to synchronize your leadscrews by lowering all three motors to their lowest possible position. The front bed arms will be bottomed out against the Z rod platform while the rear flange bearings will be sitting against the rear rod holders.

Upper Z Support:

Just slots in on top of the 2040 extrusion and holds the Z rod in place. Don't put this on backwards, it's very easy to reverse. This is the most likely part to require some tuning for your printer.

Rear Arms:

These arms use the existing mounting holes for the rear bed and serve as outriggers to the CR10 bed. I used screws from my screw kit to replace the short bed mounting screws that come with the Ender 5.

BONUS Electronics bracket:

Assembling this contraption with the electronics below the bed is not a good idea, it will be trapped if anything goes wrong. These brackets allows the electronics box to be mounted on the side of the ender 5 with the addition of some more trapezoidal nuts and screws. I mounted mine with the bottom panel facing in due to the way my enclosure works, you may need to do the same.

Good luck.