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Intelligent microstepping drives feature multi-tasking programmable control

02 June 2011

Mclennan Servo Supplies has launched a range of intelligent microstepping drives from the USA drive specialist Applied Motion Products. The flexible STAC5 series features advanced algorithms for extended dynamic performance and a variety of motion control options, including a choice of step & direction, PC or PLC host control, and fully featured multi-tasking programmable control.

The compact panel-mount STAC5 series is designed for straightforward integration into motion control systems with direct-on-line power at nominal voltages of 120 VAC and 220 VAC with a maximum of 5 Amps per phase to suit 23 and 34 frame NEMA stepper motors. A 100 Mbit Ethernet communication port is included to configure the drive with self test and auto setup as well as support streaming of individual commands or full program upload and download. An encoder feedback option is also available that provides position verification and combines with a stall detection and stall prevention feature that allows selectable levels of position maintenance.

The STAC5 has a number of current control features that help deliver improved motor performance. The Anti Resonance algorithm improves midrange stability allowing higher speeds, faster settling times and improved torque whilst Torque Ripple Smoothing  greatly improves low speed dynamic performance. The Command Signal Smoothing algorithm reduces jerk which can help reduce wear on mechanical transmission components. In addition, the Microstep Emulation feature converts low resolution step pulses from a controller into microsptep resolution pulses at the motor, vastly improving smoothness.

The STAC5 series is available with a choice of two controller options. The S controller allows step & direction interfacing from any third party controller and can also be software configured for run-stop operation where built in analogue and digital I/O can toggle speeds or provide a joystick control interface.  The S controller and the more powerful Q controller will both accept serial commands over Ethernet from a PC or a PLC for multi-axis control.

For full standalone programmable control, the Q controller uses Applied Motion Product's powerful Q language with high level features that include multi-tasking, conditional programming and maths functions. The Q version is able to download, store and execute programs from a host or directly from the Q Programmer GUI which allows straightforward motion and machine I/O programming from a PC. The S controller includes 4 digital inputs, 2 digital outputs and 1 analogue input. The Q controller has 12 digital inputs, 6 digital outputs and 1 analogue output.

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