Servostar PicoDAD Kollmorgen
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The Kollmorgen Servostar PicoDAD is part of the PD Servostar Servo Drives series and weighs 0.55 kg with overall dimensions of 140 by 108 by 51 mm. The drive features a 14-bit analog input resolution, 16 kHz current loop sample rate, and a maximum encoder frequency of 3 MHz. It supports a logic input voltage of 24 VDC and an overtemperature trip threshold of 80 degrees Celsius.
Internal Product Review
The Servostar PicoDAD is a Kollmorgen servo drive that stands out as a finely tuned solution for compact motion-control systems. A 14-bit analog input resolution and a 16 kHz current loop sample rate support accurate command processing with very stable response characteristics. A 3 MHz encoder max frequency and 4096x sine encoder interpolation make this drive especially attractive for high-precision feedback performance.
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Product Description:
The Servostar PicoDAD is a compact servo drive manufactured by Kollmorgen within the PD Servostar Servo Drives series. It uses a 24 VDC logic supply and a separate power stage to generate pulse-width-modulated phase currents for brushless motors. This arrangement gives machine controllers precise authority over motor position and speed in industrial automation. Its compact format supports installation in automated handling, packaging, and light assembly equipment where panel space is limited.
The analog command channel is digitized at 14-bit resolution, providing detailed command conversion for precise motion control. The current regulator update rate and carrier switching frequency are both 16 kHz, helping the drive respond quickly while keeping torque ripple low. Feedback signals can be read at frequencies up to 3 MHz, supporting high-speed position acquisition from compatible devices. The unit can decode up to 10,000,000 encoder lines per cycle and applies a sine encoder interpolation factor of 4096 for high-resolution commutation. Continuous PWM operation produces a 32 kHz current ripple pattern that remains within typical motor bandwidths. The enclosure measures 140 × 108 × 51 mm and has a mass of 0.55 kg, making it suitable for compact control assemblies.
The velocity controller is refreshed at 4 kHz, allowing stable speed regulation while the current loop operates at a higher update rate. The charge pump reaches its operating voltage in 0.25 seconds, after which fault contacts rated at 1 A can report drive status to connected control circuits. Logic inputs draw 0.6 A from the 24 VDC rail, and the soft-start circuit limits power-up inrush current to 30 A. Thermal protection disconnects the drive if the heat sink reaches 80 °C, preventing operation beyond the permitted temperature limit. An overtemperature trip, a fault relay, and dedicated logic inputs provide monitoring and control functions during continuous service. These protective functions operate alongside the current and velocity regulators without changing the drive’s normal feedback processing or motor-control behavior.
