FORMING AND FABRICATING AUTOMATION
Five Factors in Selecting a Resolver-Based Die-Protection Controller
Sensors in the Modern Pressroom M etal formers still rely on many of the basic sensor technologies to verify part ejection, feed progression and myriad other critical tasks. But an increasing number of modern electronics now find their way to the shop floor—faster, smaller, and more accurate and
T he most important decision metal formers will make when starting a die-protection program is their choice of controller. A misstep here can doom the program before it starts.
Using an intermediate die-mounted junction box to which all the sensors are permanently wired is the best- practice connection method.
intelligent than ever before. High-end
toring logic, and ease of setup and use. Keep
State-of-the-art die-protection controls generate their own timing signals using a resolver, a rotary sensor driven at a 1:1 ratio with the press crankshaft. Resolver-based controls provide a solid foundation for a die-protection program as they are extremely rugged, have infinite resolution and provide accurate tim- ing regardless of the press’ operat- ing mode. Five important considerations when selecting a resolver-based die-protection controller are capac- ity, accuracy, speed, available moni-
functionality now is built into many
in mind that the controller must be able to protect the most challenging dies. For example, if a shop uses an average of six sensors per die, but has several dies that require 16, it will need a controller with at least 16 inputs.
Resolver-based controls provide a solid foundation for a die-protection program.
basic designs. Software-controlled LED pixel arrays, real-time process efficiency updates sent straight to a cell phone, camera-based part positioning and quality- assurance scanning … who’d have envisioned these capabilities three decades ago?
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