Mini DVD Motor 3D Printer 2.0! Featuring dual Z and Y motors, and a heated bed.

Features:

• Dual motors on Z and Y for improved reliability
• linear bearings on all axis
• Integrated extruder and spool holder
• Duet3D board and LCD.

Parts required

• 5x CD Drive stepper motors. This gets tricky because some of them have different hole spacing. I have noticed LG or LITE-ON drives seem to have the correct ones.
• 12x - LM3UU Linear Bearings
• 1x - Nema17 (I used generic BMG extruder)
• Lots of 3M screws for assembly, some button head, some countersunk
• 6x 3mm rods, recycled from CD drive
• 3x microswitch for endstops
• Controller board of choice. I am using Duet 2 WiFi
• Ender 3 Hotend
• 1x 40mm fan for rear cooling
• 1x 30mm fan for hotend
• 2x 4010 blower fan for part cooling
• 5mm LED strip for interior lighting channels
• 50x50mm acrylic for print bed. Suggested PEI on top.
• Machine oil (sewing machine oil works) for rods and leadscrews.
• Panel mount barrel jack for power
• Optional, USB C 12v PD board.

Mini Heatbed PCB

• The files for the heated bed PCB are attached, all credit to @icesythe7 for designing this. You can order the PCB from PCBway or similar.
• Attach heatbed PCB to bed mount and use pen springs to level, I also cut a small magnetic sticker and spring steel PEI to fit

I printed the frame in PETG, all moving parts are ASA but PETG would be fine as well. the motors get very hot so PLA will deform.

Assembly is fairly straightforward as shown in photos and fusion model. Take extra care to ensure your bearings are straight and parallel when pressed into the carriage or you will run into issues with loosing steps (motors are not very strong). I suggest assembling the two halves independently, and then putting them together at the very end.