Automated fastening machines require precise velocity
and torque control. Winding machines need high-speed
wire take up, and precise tension control. That's where
Copley Control's Model 5424AC could simplify controls
on fastening or winding machines--as well as pick-and-place,
robots, automated assembly equipment, and material testing
It features remote speed/torque mode switching, and
drives brushless dc servomotors (to 2.5 hp continuous)
with power direct from AC mains.
The servoamplifier's current monitor provides feedback
to the controller. As fasteners take up toward the end
of travel, sensors detect increasing winding current
and signal the controller which then cues the amplifier
to switch from velocity to torque mode. In the torque
mode maximum current settings prevent the motor from
applying excessive torque to delicate loads, and from
Three velocity loops add to the servoamplifier's flexibility.
A frequency-to-voltage (F/V) converter emulates traditional
motor-driven tachogenerators. Result: speed feedback
without a separate motor-driven tachometer. Another
velocity mode uses the F/V converter to transform digital
shaft encoder signals to analog velocity feedback. The
third mode uses IR compensation to control the motor
back emf and maintain constant velocity as the load
changes. Adjustable soft start capability smoothes mechanical
Truchard will be presented the award at the 2014 Golden Mousetrap Awards ceremony during the co-located events Pacific Design & Manufacturing, MD&M West, WestPack, PLASTEC West, Electronics West, ATX West, and AeroCon.
In a bid to boost the viability of lithium-based electric car batteries, a team at Lawrence Berkeley National Laboratory has developed a chemistry that could possibly double an EV’s driving range while cutting its battery cost in half.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.