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The STAC series are AC input high performance digital stepper drives with multiple control options and many sophisticated features. The STAC series support stand alone programming and various bus control as RS-232/485, Ethernet UDP/TCP, CANopen and EtherNet/IP.
Anti-ResonanceStep motor systems have a natural tendency to resonate at certain speeds.The SR drives automatically calculate the system’s natural frequency and apply damping to the control algorithm. This greatly improves midrange stability, allows higher speeds and greater torque utilization, and also improves settling times. Provides better motor performance and higher speeds
Microstep EmulationWith Microstep Emulation, low resolution systems can still provide smooth motion. The drive can take low resolution step pulses and create fine resolution motion. Delivers smoother motion in any application
Torque Ripple SmoothingAll step motors have an inherent low speed torque ripple that can affect the motion profile of the motor. By analyzing this torque ripple the system can apply a negative harmonic to counter this effect.This gives the motor much smoother motion at low speed. Produces smoother motion at low speeds
Command Signal SmoothingCommand Signal smoothing can soften the effect of immediate changes in velocity and direction, making the motion of the motor less jerky. An added advantage is that it can reduce the wear on mechanical components. Improves smoother system performance
Auto Setup & Self TestAt start-up the drive measures motor parameters, including the resistance and inductance,then uses this information to optimize system performance. The drive can also detect open and short circuits.
0.5-2.55A/Phase(peak of sine) in increments of 0.01A
Signal Phase 94-265VAC
Over-voltage, under-voltage, over-temp, internal motor shorts (phase-to-phase, phase-to-ground)
Built-in regeneration circuit, 10 watts max.
Automatic idle current reduction to reduce heat after motor stops moving, software selectable current and idle delay
Software selectable from 200 to 51200 steps/rev in increments of 2 steps/rev
Switch selectable microstep emulation provides smoother, more reliable motion
Raises the system-damping ratio to eliminate midrange instability and allow stable operation throughout the speed range of the motor, dip switch selectable load inertia
Torque Ripple Smoothing
Allows for fine adjustment of phase current waveform harmonic content to reduce low-speed torque ripple in the range of 0.25 to 1.5 rps
Optional encoder feedback for stall detection and stall prevention
Configurations are saved in FLASH memory on-board the DSP
0 - 40°C when mounted to a suitable heat sink
X1, X2 inputs: Optically isolated, differential, 5-24 VDC, minimum pulse width = 250 ns, maximum pulse frequency = 2 MHz X3, X4 inputs: Optically isolated, differential, 5-24 VDC Y1, Y2 outputs: Optical darlington, sinking or sourcing, 30 VDC max, 100 mA max Analog input: Single-ended. Range is software selectable 0-5, +/-5, 0-10, or +/-10 VDC. Software configurable offset, deadband and filtering. Resolution is 12 bits (+/- 10 volt range), 11 bits (+/-5 or 1-10 volt range) or 10 bits (0-5 volt range).
-Q-A models have the same I/O as above plus the following: IN1, IN2, IN7, IN8 inputs: Optically isolated, differential, 5-24 VDC logic (2.5V switching threshold), 100 usec minimum pulse width, maximum current = 10 mA. IN3-IN6 inputs: Optically isolated, single-ended, shared common, sinking or sourcing, 12-24 VDC logic, 2200 ohms, maximum current = 10 mA. OUT1-OUT3 outputs: Optical darlington, single-ended, shared, sinking, 30VDC max, 100 mA max, voltage drop = 1.2V max at 100 mA. OUT4 output: Optical darlington, sinking or sourcing, 30 VDC max, 100 mA max, voltage drop = 1.2V max at 100 mA.
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