Ultimaker Heated Bed
thingiverse
The PCB must be milled from a 20x30cm double-sided FR4 board, featuring the usual 0.35 micrometer copper thickness. A small dent on the left side ensures space for Joris-style extrusion at the minx-miny corner. The bottom houses a thermistor in the central hole, while an SMD LED with a (1k) SMD transistor can be added between the top-side connectors. A 24V 300W power supply is required, but its safe installation depends on your knowledge of dealing with 220V. The Ultimaker Z-carriage screwholes accommodate the glass plate, which measures 22x24cm and is secured using smaller holes via small wooden pieces (3.2mm). Mounting the glass may necessitate diagonal cutting to enable initial through-extrusion if a second extruder isn't available. The previous image displayed a cracked glass version and will be replaced soon.
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