00196044-05 - sg x und x4i fse_en - 第290页
C&P20A Axis Control Star Axis Control System S tudent Guide (FSE) SI PL ACE X Series and X4I C&P20A Edition 01/2009 EN 290 7.7.3 St ar Axis Control System 7.7.3.1 Checking the S tar Axis Dynamics 7-53: Axis contr…
C&P20A
Track Signals for Head Axes Axis Control
Student Guide (FSE) SIPLACE X Series and X4I
Edition 01/2009 EN C&P20A
289
7.7.1.1 Positioning Time for C&P20A
7.7.2 Track Signals for Head Axes
The track signals play a greater role with the new drive concept for X (HF) machines. They are
responsible for the exactly and precise positioning of the axes and are used as the only feedback signal
in the closed-loop control system, meaning that they have an important influence on the axis dynamics.
7.7.2.1 Preparing the Track Signals
Axis Mode/range/ Positioning time
Star Axis continuous run/1 step (18°) 28.5 ms +/-0.5 ms
Z Absolute, free space /20,000 digits 10,000 µm Target 16.7 ms+/-1ms
DP Rotation of 180° Max. 300 ms
ATTENTION:
The positioning times in the table do not apply during the placement or pickup procedures.
These times refer to the continuous axis run of an axis.
C&P20A
Axis Control Star Axis Control System
Student Guide (FSE) SIPLACE X Series and X4I
C&P20A Edition 01/2009 EN
290
7.7.3 Star Axis Control System
7.7.3.1 Checking the Star Axis Dynamics
7-53: Axis control for the C&P20A star axis
The star axis is driven via a 3-phase AC stepping
motor with an intermediate circuit voltage of 120 V.
The activation is via two track signals (phase shift
120°) from the VC3 controller Itarget "W" and I-
target "U". The third phase is calculated
automatically.
Legend
1. Axis Controller Board A364
2. Control signals
3. LEDs on servo board:
– GREEN: Power supply ON
– GREEN: Servo enable, if the enable signal
has been received from the axis board.
– YELLOW: Display R.M.S. current limiter
shorter than 2.5 s.
– RED: Error: overvoltage, overcurrent,
overtemperature longer than 2.5 sec.
4. Servo amplifier
5. 3 phase AC motor.
6. Between the motor and the incremental
encoder there is a fixed mechanical
connection.
7. Incremental encoder: transmits the exact
position of the axis (track signals).
The servo board controls the 3-phase AC motor
directly.
NOTE:
Before checking the axis dynamics, make sure that the machine has reached its operating
temperature. Switch the machine on at least 30 minutes before you begin work.
C&P20A
Star Axis Control System Axis Control
Student Guide (FSE) SIPLACE X Series and X4I
Edition 01/2009 EN C&P20A
291
7.7.3.2 Measurement Setup Note
7.7.3.3 Measurement Setup with SAT Box and A364
7-54: Measurement setup with SAT box
NOTE:
When checking the dynamics, it may be sufficient if you check the travel times and overshoot
behavior of the axis with the SIPLACE axis tester display and the values in the settings tables. ->
X For exact error location, you need to use a suitable oscilloscope or special software for
analysis of the dynamics.