During a firing schedule, a setpoint is the pre-set firing temperature the kiln must reach in order to successfully complete each step. A setpoint controller measures the kiln’s temperature and cycles the relays to ensure the kiln reaches the desired temperature.
Setpoint controllers, also known as process controllers, are programmable digital devices that automatically execute firing schedules. All the user has to do is enter the desired setpoint(s), and the controller takes care of the rest!
What Is the Difference Between a Single Setpoint and a Multi-Setpoint Controller
When it comes to kiln firing schedules, there are varying degrees of complexity. For firing glass or ceramics, the kiln often has to reach multiple setpoints over multiple steps. However, most heat treat processes – such as those used for making knives, jewelry, or firing metal clay – only involve a single setpoint.
A multi-setpoint controller is capable of executing complex schedules with multiple setpoints. For instance, the TAP and TAP II Controllers by SDS Industries can accommodate schedules with an infinite number of steps! However, that level of robustness might be a little excessive for users who only work in heat treat, which is where single setpoint controllers come into play.
Single setpoint controllers are greatly simplified and only require the user to enter the single setpoint they need for each individual heat treat process.
Single Setpoint Heat Treat Processes
While a multi-setpoint controller is capable of executing schedules with a single setpoint, below are metal heat treat processes that only require a single setpoint:
- Normalizing: The metal is heated to an extremely high temperature for a defined period of time and then air-cooled. Normalizing relieves internal stress and ensures uniformity, resulting in harder, stronger metals.
- Hardening: The metal is heated until it forms an even solution and then allowed to cool to increase its hardness.
- Case Hardening: Only the outside of the metal is hardened, creating a durable outer layer while ensuring the metal retains flexibility and doesn’t become brittle.
- Quench Hardening: After heating, the metal is cooled rapidly by dipping it into an oil, polymer, or water, resulting in very hard, very brittle metal.
- Tempering: After hardening, the metal is heated to a lower temperature to reduce excessive hardness and relieve internal stress. Tempering makes metals less brittle.
- Annealing: The metal is heated beyond the upper critical temperature and then slowly cooled to soften it and increase its workability. Annealing increases ductility and toughness, while relieving stress, making the metal more resistant to fractures. While annealing can be completed with a single setpoint controller, it will be necessary to use sand or insulated blankets to make sure the metal doesn’t cool down too quickly outside of the oven. However, a multi-setpoint controller can be used to slowly anneal metal within the oven.
Introducing TAP&Go: The Most Easy-to-Use, Streamlined Single Setpoint Controller
In the past, single setpoint controllers were far less featured than their multi-setpoint counterparts. This forced heat treat artists to choose between advanced multi-setpoint controllers that required paying for functionality they didn’t need, or simplistic single setpoint controllers that lacked precision, ease-of-use, or required constant monitoring to know when the oven had reached the right setpoint.
SDS Industries has set out to change that with our soon-to-be released TAP&Go Single Setpoint Controller! Designed specifically for heat treat artists, knifemakers, or users who don’t need to execute complex firings, TAP&Go takes the precision and ease-of-use of TAP and simplifies it into the most advanced single setpoint controller on the market.
With TAP&Go, heat treats artists have the ability to:
- Easily enter the temperature you want the kiln or oven to heat to – from the 2.4” touchscreen or the TAP Kiln Control Mobile app – and let the controller do the work.
- Enjoy complete remote monitoring and control through the TAP Kiln Control Mobile app with a premium subscription.
- Use TAP&Go’s built-in WiFi and Bluetooth to automatically pair with the TAP Kiln Control Mobile app.
- Prevent eye strain with light and dark modes and large, full-text displays.
Explore Single Setpoint and Multi-Setpoint Controllers by SDS Industries
Whether you’re looking for a single setpoint or multi-setpoint controller, TAP has you covered! The TAP and TAP II Controllers by SDS Industries provide users the most advanced, precise, and easy-to-use multi-setpoint temperature controllers on the market today. With responsive touchscreen controls, an intuitive graphical UI, and integration with the TAP Kiln Control Mobile app, TAP Kiln Controllers can pair with any relay-controlled kiln or oven.
The soon-to-be-released TAP&Go takes the design principles of TAP but streamlines everything into a single setpoint controller so that heat treat artists only have to pay for the functionality they need!
We invite you to explore our selection of programmable kiln controllers, standalones, and conversion kits on our online store. You can also purchase TAP Digital Controllers or TAP Controlled Kilns and Heat Treat Ovens through one of the following distributors:
- Hot Shot Oven & Kiln
- Mobile Glassblowing Studios, LLC
- Jen-Ken Kilns
- Kiln Frog
- Sheffield Pottery
- Delphi Glass