Integrated heat, temperature sensting, and motor control
The Thingomatic Heater Board is mashup of innovative 3D printing techniques. The heater board fulfils a number of roles in the Thingomatic. First, it provides a nice, flat printing surface with mounting holes. Second, the PCB itself is one large, flat heater which provides very even heating across the surface. Third, the PCB includes an on-board thermistor which allows the board to measure its own temperature. Last, but not least, the PCB includes a header for connecting it to the rest of the MakerBot electronics so that you can easily wire it up.
The input is a 6 pin, .156" pitch header with right-angle connectors for attaching the pre-made wiring harness. This connector provides power for the heater, and the automated build platform motor. It also has connections for the temperature sensor output.
|1||GND||This is the ground for the analog thermistor measuring circuit.|
|2||5V||This is the 5V input voltage for the analog thermistor measuring circuit.|
|3||SIG||This is the analog signal output of the thermistor measuring circuit.|
|4||+12V||This pin is connected to the +12V terminal from the extruder controller MOSFET. This +12V is to power both the DC motor and PCB heater.|
|5||HEAT-||This pin is connected to the - terminal of the extruder controller MOSFET. This pin will control when the heater is on or off.|
|6||MOT-||This pin is connected to the - terminal of the extruder controller MOSFET. This pin will control when the automated build platform motor is on or off.|
DC Motor Output
The Thingomatic comes standard with an automated build platform, and that build platform requires a DC motor to operate. The DC motor comes with a 2 pin header that corresponds to the 2 pin header on the PCB.
|1||MOTOR-||This pin is the negative terminal of the DC motor. This is directly connected to pin 6 of the interface connector which is in turn connected to the negative terminal of the DC motor MOSFET. This pin controls when the DC motor is on or off.|
|2||MOTOR+||This pin is the positive terminal of the DC motor. This is directly connected to pin 4 of the interface connector which is in turn connected to the +12V|
Partlist / BOM
The Thingomatic Heater Board v1.1 is a derivative of the Cupcake Heater Board v1.0 which was originally designed by Zach Hoeken of MakerBot Industries and Jordan Miller of Hive76.org.