1.4. Specifications
Motor requirements
Motor type: bipolar stepper motor, DC motor.
Rated winding current: minimum 100mA.
Rated winding voltage: minimum 2V DC.
Electric specifications of the controller
Power supply modes: external.
Current in each motor winding: up to 3A.
Maximum encoder pulse frequency: 200 kHz for single-ended and 5MHz for differential encoder.
Stabilized 5V DC output (the power supply for encoder and other peripherals): 100mA maximum output current, 5% or better
output voltage stability.
ESD-protection on all pins of the output connectors (e.g., D-Sub 15 pin, mini-USB or power jack).
Winding-to-ground short circuit protection.
Winding-to-winding short circuit protection.
Motor hot-swapping protection.
Wrong power polarity protection (no more than 1s).
Voltage overload protection (no more than 1s).
USB-supplied current limitation.
External power supply current limitation.
Motor rotation speed limitation.
Programmable full winding current with 10mA precision.
Programmable winding current decrease with 1% precision for the hold mode.
Rotation control features
Microstep modes: full-step, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256.
Noiseless at low speeds.
Minimum speed is 1/256 of the full step per second.
Maximum speed is up to 35 000 full steps per second for all microstep modes.
Minimum shift is 1/256 of the step.
Maximum shift is 2,147,483,647 full steps for all microstep modes.
Smooth start/stop mode.
40-bit position counter (32 bits for full step and 8 bits for microstep).
Motion modes: left/right move, move to point, shift on delta, continuous speed, acceleration and deceleration ramps, backlash
compensation mode, automatic home position calibration mode.
Additional firmware features
Automatic HOME calibration at firmware level.
The nonvolatile memory used for saving/downloading the controller settings.
Software update via USB interface.
Automatic position saving according to step counter and encoder with power-off protection.
Additional features available via motor connector
Processing the signals from one or two limit switches; software configurable.
The Standa stages recognition and automatic downloading of the configuration file right from the stage if the last one supports
this feature.
The "step loss" detection and position recovery using either a revolution sensor or a quadrature encoder (if the stage supports
this feature).
The position detection using a quadrature encoder. The x4 mode.
The stepper motor control using master quadrature encoder mode, providing the maximum speed without any step loss. Starting
with firmware 4.1.
Additional features available via backplane connector
USB connector on backplane that duplicates USB input on controller board.
A serial RS-232 port. TX and RX lines are available. Specifications: 9600 - 921600 baud speed, TTL 3.3V. The Ethernet,
Bluetooth, WiFi, ZigBee and other configurations based on the serial port are available by request.
Synchronization input: once the pulse is received via this pin, the controller starts rotating the motor to predetermined position
or by predetermined shift value. The triggering mode, the polarity and duration of the pulse are adjustable by user.
Specifications: TTL 3.3V.
Synchronization output: emit pulse to this pin if rotation is started or finished, or predetermined user-defined shift value is
reached. The triggering mode, the polarity and duration of the pulse are adjustable by user. Specifications: TTL 3.3V.
Left or right buttons. Once the button is pressed, the rotation in corresponding direction starts and the speed increases gradually
according to acceleration and other settings. Specifications: TTL 3.3V.
Joystick pin allowing operation with various joysticks with the voltage range no more than 0–3V.
Magnetic brake control pin providing control to magnetic brake mounted on the motor shaft. Specifications: TTL 3.3V, 5mA.
Common analog input pin allowing operation with signals within 0–3V range. Reading frequency is 1kHz. The configuration is
programmable.
Common digital input/output pin. 1kHz update frequency, software configurable. Specifications: TTL 3.3V, 5mA.
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