Folks,
I'm building a small thermoforming heater (16" x 16"). I'm planning to thermoform (Vacuum Form) some 0.020" PETG or ABS. Looking for workable plans for this heater and where to procure the materials like insulators, nichrome wire, etc. I have a Variac for the power supply.
More specifically, how far should I "stand-off" the hot coils from the surface of the heater and how far apart should these coils be? I'm planning a spiral heater coil wire design - what gage wire would be best for this application?
Any input would be appreciated.
I have some rather shiny galvanized sheet metal I can use, Hardy Backer for the box itself?
Ideas?
Thanks!