3D printer PCB hot bed Mk2b 12/24 dual power supply 214x214mm

Specification: All features from MK2A and you also can operate this board now with 12v or 24v - a central mounting hole on the front side to allow for three point mounting. This is much easier for bed leveling in comparison to 4 point mounting. First level the side with two holes and fix in place, then level the side with one hole. A glass plate is highly recommended to provide a truly flat surface and rigidity - The pads to solder onto have been greatly increased as shown in the picture below. The picture shows the wires prepared for soldering routed through the holes for extra security. This does not remove the need to use proper strain relief. Copper plated holes as shown in reprap wiki: reprap.org/wiki/PCB_Heatbed You can find the open source files here: http://forum.reprapdiscount.com/forums/oss/ Dimensions 214mmx 214mm Laminate FR4 1.6+-0.15mm 2 layer, 35μm copper Red Soldermask - both sides White Silkscreen - both sides Power Input: 12V or 24v copper plated holes resistance between 1.0 and 1.2 ohm