P.I.D. Programmable Oven

A compact and portable high precision programmable oven for composite curing.

Retrofit

The goal was to create a portable oven that could run a programmable schedule to a high degree of precision. The heating elements and housing were sourced from a Black and Decker (TO1755SB) counter-top oven, chosen for its high heat capacity and moderate oven volume.

Schematic

A general schematic and Arduino program were found from an open-source (MrRoboto19) at create. Arduino. cc. The electronic and program were modified in order to support a much smaller oven than designed for and in order to accommodate more user information and control over the curing cycle. The oven utilizes: an Arduino Uno, t100 thermistor, 16-character display, number pad, on/off switch, SS-relay, and fan/heat-sink to provide cooling.

Testing and Software

Numerous tests were done to check the control of temperature given the large aluminum molds which would be used, and the relatively low thermal insulation used.

Final Product

The current configuration is capable of storing hundreds of cycles in the SD-card. The schedules are selected from the number pad. The display shows the cycle title, current and target temperature, time remaining in the cycle, and at the end of the cycle reads “DONE”. Furthermore, at the end of the cycle real-time, temperate is displayed and the Status indicator turns off to indicate safe handling temperature has been reached. The cycle has a range of 0-300℉ with only a 2-degree max deviation anytime within the cycle.