Sigma-5 servo system 3
AC Servo systems
Sigma-5 Analog/Pulse Reference Servo Drive
General specifications
Speed/torque control mode
Performance
Speed control range 1:5000
Speed
variance
Load variance During 0 to 100% load ±0.01% max. (at rated speed)
Voltage variance Rated voltage ±10%:0% (at rated speed)
Temperature variance 25 ±25 °C: ±0.1 % max. (at rated speed)
Frequency characteristics 1.6 kHz
Torque control accuracy (Repeatability) ±1%
Soft start time setting 0 to 10 s (acceleration, deceleration can each be set.)
Input signal
Speed
reference
input
Reference voltage ±6 VDC (forward motor rotation if positive reference) at rated speed: Set at delivery
Variable setting range: ±2 to ±10 VDC at rated speed/ max. input voltage: ±12 V
Input impedance Approx. 14 kΩ
Circuit time constant Approx. 30 µs
Torque
reference
input
Reference voltage ±3 VDC (forward rotation if positive reference) at rated torque: Set at delivery
Variable setting range ±1 to ±10 VDC at rated torque reference, max. input voltage: ±12 V
Input impedance Approx. 14 KΩ
Circuit time constant Approx. 30 µs
Position control mode
performance
Feedforward compensation 0 to 100% (setting resolution: 1%)
Position completed width setting 0 to 1073741824 command units (setting resolution: 1 command unit)
Input signal
Command
pulse
Input pulse type Sign + pulse train, 90° phase displacement 2-phase pulse (A-phase+ B-phase) or CCW/CW pulse train
Input pulse form Non-insultated line driver (+5 V level) , open collector.
Input pulse frequency 0 to 4 Mpps (200 Kpps max. at open collector)
Control signal Clears error pulse by external signal
I/O signal
Position signal output A-phase, B.phase, C-phase: line driver output.
Sequence input signal Servo ON, P control (or control mode switching, forward/reverse motor rotation by internal speed setting, zero
clamp, command pulse inhibit), forward/reverse run prohibit, forward/reverse current limit (or internal speed
switching), alarm reset.
Sequence output signal Servo alarm, alarm codes (3-bit output): CN1 output terminal is fixed
It is possible to output three types of signal form incl.: positioning complete, speed coincidence detection, servo-
motor rotation detection, servo ready, current limit detection, speed limit detection, brake release, warning, NEAR.
Integrated functions
USB
Communica-
tions
Interface Personal computer
Communications standard Compliant with USB1.1 standard (12 Mbps)
Function Status display, parameter settings, adjustment functions, utility functions, alarm traceback display, JOG run/au-
totuning operations and graphing functions for speed/torque command signal, etc
Automatic load inertia detection Automatic motor parameter setting. One parameter rigidity setting.
Dynamic brake (DB) Operates during main power OFF, servo alarm, servo OFF or overtravel
Regenerative processing Internal resistor included in models from 500 W to 5 kW. Regenerative resistor externally mounted (option).
Overtravel (OT) prevention function DB stop, deceleration stop or coast to stop during P-OT, N-OT operation
Encoder divider function Optional division pulses possible
Electronic gearing 0,01< Numerator/Denominator<100
Internal speed setting function 3 speeds may be set internally
Protective functions Overcurrent, overvoltage, low voltage, overload, regenerative error
Analog monitor functions for supervision Integrates analog monitor connector for supervision of the speed and torque reference signals, etc.
Number of channels: 2 (Output voltage: +/-10V DC)
Panel operator Display functions CHARGE, 7-segments LEDx5
Panel operator keys Used to set parameters (4 keys)
Safety functions Hard wire base block signal and status monitor (fixed output) of safety circuit
Others Reverse connection, zero search, automatic motor discrimination function, and DC reactor connection terminal
for high frequency power suppression function.