Making a heat treatment oven

Re:Making a heat treatment oven by rfrey on Saturday October 17, 2020 @02:01PM (#24811839)

Great tool, super useful.

For a few extra bucks you can use a programmable temperature controller... search "Programmable Temperature Controller Ramp Soak Heat" at the usual suspects. Allows you to program heating ramp up, ramp down, and soak times - very useful for heat treating various alloys.

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Re:Making a heat treatment oven by vvanders on Saturday October 17, 2020 @02:07PM (#24811878)

Yup, Automation Direct is my go-to "cheap" option for this.

They also make some very low cost PLCs that work pretty well. I built a solar powered DC irrigation pump with proper PID control+SSR to support varying flow rates(most irrigation pumps are on/off only) with their hardware.

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Re:Making a heat treatment oven by dkdk8283 on Saturday October 17, 2020 @03:53PM (#24812689)

I used an off the shelf controller for my pump. About $100 for a 3A VFD not including transducer

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Re:Making a heat treatment oven by vvanders on Saturday October 17, 2020 @05:47PM (#24813666)

Yeah, most pumps are AC and this was DC so I didn't have a off the shelf solution.

With a PLC, analog input for the pressure sensor and SSR to drive the PWM it was fairly straightforward to put together. Hardest part was getting the PID tuning right but even that only took a bit of time.

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Re:Making a heat treatment oven by dkdk8283 on Sunday October 18, 2020 @07:54PM (#24822115)

What PLC did you use? I’m looking to build a load shed controller for another project. I’ve been looking for something simple.

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