The Extruder - Printing in Plastic: Build Your Own 3D Printer - page 256

Figure 14-16. Shrink tubing will protect the solder joints.

Add the Thermocouple
Next, you're going to attach the thermocouple, a device that will allow the temperature of the heater core
to be monitored by another piece of electronics (more on that in Chapter 17). For now, however, all you
need to gather are the thermocouple wire, the small Allen screw, the M2 washer, and a #6 washer (see
Figure 14-17). You'll also need about 1” or so of Kapton tape to wrap around the end of the
thermocouple.

■ Note Technical editor Darrell Kelly had this to say about attaching the thermocouple using the small washers:

“I took this washer and with a pair of pliers bent it on one side not quite through the middle. This formed a small
clamping area for the thermocouple to fit into. I was able to mount the thermocouple on the first try without any
trouble. The washer is easy to bend when held with pliers and pushed against a piece of wood or countertop.