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Reading
occurs at the edge.
The
form
command pulses deviate from the
specified values.
Adjustment
The position loop gain is too small. Check the amount of position error on the monitor
Parameter
The setting of in-position detection
range (Pr60) is too large.
The command pulse frequency
exceeds 500 kpps.
Wiring
CN I/F signals are chattering:
1) Servo-ON signals
2) Counter clear input
Installation
Load inertia is large.
The initial (home) position varies.
Category
System
When calculating the initial (home)
position, the Z-phase output is not
detected.
Creep speed to initial position is
too high.
Wiring
The output of the initial (home)
position proximity sensor (dog
sensor) is chattering.
of
in-position
signals
and
width
of
the
Causes
Use the waveform graphic screen of PANATERM
monitor the position error when the in-position signals
are received. Read the in-position signals at a mid point
on the time span, not at the edge.
If the command pulses are deformed or narrowed, adjust
the pulse generation circuit. Take measures to reduce
the noise on the command pulse.
"
screen of PANATERM
. Increase the value of Pr10 to
the extent that no oscillation occurs.
Decrease the value of Pr60 (in-position range) to the
extent that the in-position signals do not chatter.
Decrease the command pulse frequency. Change the
values of Pr46 through Pr47 (numerator of 1st to 2nd
command scale).
1)
Check the wiring and connections between
CN I/F pins 2 and 13 by monitoring the display of
input and output signals status. Modify the wiring so
that Servo-ON signals can be made active correctly.
Check the controller.
2)
Check the wiring and connections between
CN I/F pins 4 and 13 by monitoring the display of
input and output signals status. Modify the wiring so
that the position error counter clear input cannot be
made active during operation. Check the controller.
Check the overshoot at stop using the wave form
graphics function of PANATERM
this is not effective, increase the capacity of the
amplifier and motor.
Countermeasures
Check that the Z-phase accords to the center of the
proximity dog. Perform initialization correctly according
to the controller.
Decrease the return speed near the initial (home)
position, or lengthen the initialization sensor.
Check the input to the sensor using an oscilloscope.
Modify the wiring around the sensor. Take measures to
reduce the noise.
- 91 -
"
to
"
. Adjust the gains. If
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