Survey & Experiment:How to control tempreture.


Survey

Tempreture control should be needed to melt plastic bottles. But I had no knowledge about tempreture control at all. So, I started to survey about how to control tempreture. As the result of survey, following parts are needed.
  • thermocouple
  • band-heater or heat-cartridge
  • controller(buy or make)
  • AC power cable
  • crimping terminal
  • Inlet, Outlet
  • SSR

Experiment

First, I bought the PID tempreture controller, because I had to understand usual method.
Connected the parts as described in the manual, it was able to controll tempreture of heat-band easily by measuring the tempreture with the thermocouple.
By using SSR, it is possible to switch ON / OFF of the heater with a small voltage. I understood that if I make something like a PID tempreture controller, I can control the temperature!
2018.2.20