The new MK3 Aluminum heated beds have a few advantages over the older MK2 and MK2B heated bed designs. The aluminum backing in the MK3 acts as a thermal buffer, building up heat much more evenly than the older PCB designs. Because of this aluminum layer, the MK3 is also flat enough to print directly on – no need for a separate piece of glass!
These heated beds are wired the same way as the older MK2 designs – the board accepts 12 or 24V power. Simply solder your wires to the pads indicated.
There’s space for SMD LEDs and a resistor, and a hole in the centre for a thermistor.
The board mounts the same way as the older designs – there’s a 3mm screw hole in each corner in the same spacing as the MK2 boards, plus an extra screw hole between the solder pads to allow for 3-point mounting. 3-point mounting makes it much easier to get the bed leveled correctly, but your printer will need a matching screw hole in the right spot
Wiring Method:
- 12V connection: positive connected to solder pad 1 and negative to pads 2 and 3
- 24V connection: positive connected to solder pad 2 and negative to pad 3 (pad 1 is not connected)
Specifications:
- Material: aluminum plate
- Color: Black
- 1 layer 35µm copper
- Voltage: 12/24V
- Resistance:
- 1.4-1.6 Ohm at 12V
- 5.0-5.4 Ohm at 24V
- Max. Temp: 180° C
- Heating Time: 24V reaches 100° C in 2 minutes
- Size: 220x 220x 3mm
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