Kollmorgen AKD PDMM series, Руководство пользователя

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AKD PDMM User Guide | Glossary
Term Description
Safe Torque
Off
A safety feature in the drive to prevent servos from being restarted (STO).
Sensor
A sensor is a type of transducer that converts one type of energy to another for
various purposes including measurement or information transfer.
Sercos
Servo Drive
A servo drive is a special electric amplifier used to power electric servo motors.
It monitors feedback signals from the motor and continually adjusts for devi-
ation from expected behavior.
Servo Motor
A DC motor which produces a torque proportional to current. Precise posi-
tioning is achieved by linear or PWM (duty cycle) control of motor current or
voltage, together with accurate monitoring of position via an external feedback
device.
Setpoint
Setpoint is the target value that an automatic control system, for example PID
controller, will aim to reach
Sinop
Sinop is a runtime engine issued from Astrolab and that provides a soft PLC
and a motion controller via a graphical view of Axis movement with log mes-
sages
Softscope -
Channel A Channel is used by the softscope to acquire the evolution of a variable that is
plugged into it
Softscope -
Probe
A device that uses onboard instruments to gather and relay a variety of meas-
urement to controllers from remote locations. Probes may return their data over
radio links or be physically tethered to controllers or another device, or to col-
lect and return physical samples
Softscope -
Sampling
To acquire the variable’s evolution, samples are taken at fixed intervals. The
accuracy to create the trace depends on the resolution of the acquisition.
The sampling frequency must be higher than 2 times the highest frequency in
the input signal. This is called the Nyquist frequency. Theoretically it is pos-
sible to reconstruct the input signal with more than 2 samples per period. In
practice, 10 to 20 samples per period are recommended to be able to examine
the signal thoroughly
Softscope -
Time base The time base allows to set the speed at which all the lines for each channel
are drawn, and is calibrated in milliseconds per division
Softscope -
Trace The trace is the resulting graph of a variable’s evolution against time, with the
more distant past on the left and the more recent past on the right
Stall speed
The maximum speed which a stepping motor, properly ramped, can achieve
without loss of synchrony. This speed is a function of motor inductance, ramp
slope, applied load, and drive voltage and design.
Start/stop
speed
The maximum step rate which can be applied to a stationary stepping motor
and still retain error-free performance. Also, the rate from which a stepping
motor may be instantaneously stopped without overshooting. This is a function
of the screw pitch, load, drive voltage and design, and motor.
Step rate
A type of motor featuring two or four stator coils and a toothed permanent mag-
net rotor, which moves through a small angle in response to a specific
sequence of coil current changes.
Stepping
motor
The frequency of coil current changes, or input pulse train, applied to a stepping
motor, in pulses/second or hertz. For 200 step/revolution motors, the full step
rate multiplied by 0.3 equals the rotation rate in R.P.M.
Straightness
of travel
Deviation from straight line motion in a horizontal plane. Also referred to as hor-
izontal runout. This error is usually traceable to an underlying angular error of
the ways.
Kollmorgen™ | December 2012 506