00196044-05 - sg x und x4i fse_en.pdf - 第223页
Gantry Checking the Zero Pulse Signal Track Signals and Zero Pulse S tudent Guide (FSE) SIPL ACE X Series and X4I Edition 01/2009 EN Gantry 223 Measurement Procedure X Move the gan try manually over the zero pulse (see i…
Gantry
Track Signals and Zero Pulse Checking the Zero Pulse Signal
Student Guide (FSE) SIPLACE X Series and X4I
Gantry Edition 01/2009 EN
222
6.4 Track Signals and Zero Pulse
6.4.1 Checking the Zero Pulse Signal
The zero pulse must be reliably and clearly recognized by the read head. To ensure this, you can check
both the analog and the digital zero pulse. Electronically controlled settings can not be performed on the
incremental length measurement system.
See also:
J
4.4.1.2 Zero Pulse at the Track Signal Encoder [
J
131]
6.4.1.1 Measuring the Analog Zero Pulse Signal
6-12: Measurement procedure for checking the analog zero pulse and the analog track signals
NOTE:
Since 2007 a new read head is fitted. A larger measuring window allows you to reliably
compensate contaminants on the incremental scale (up to approx. 2.5 mm).
Gantry
Checking the Zero Pulse Signal Track Signals and Zero Pulse
Student Guide (FSE) SIPLACE X Series and X4I
Edition 01/2009 EN Gantry
223
Measurement Procedure
X Move the gantry manually over the zero pulse (see instructions or description of zero pulse search).
X The following picture should appear on the oscilloscope.
6-13: Measuring the initial zero pulse position
X Connect the measurement tester to the
incremental encoder.
X Main switch
ON
X Connect the oscilloscope to the measurement
tester.
X Set the measurement adapter to
Calibrate
oscilloscope
and position the signal at the top,
center of the screen.
NOTE:
When the gantry is positioned at the hardware stop, an area of 25mm begins, in which no zero
pulse search is permitted. Check the first zero pulse after this area, on the incremental scale.
6-14: Correctly adjusted read unit
Legend
1. There should be no interference pulse in the
tolerance space of - 0.3 V.
2. The analog zero pulse must overshoot the
switching threshold by more then 0.3V.
3. Initial position
4. Analog zero pulse
5. Digital zero pulse
6-15: Incorrectly adjusted read unit or contaminated zero pulse
Legend
1. Analog track signal A and B
2. Analog zero pulse
3. Digital zero pulse
Gantry
Track Signals and Zero Pulse Checking the Zero Pulse Signal
Student Guide (FSE) SIPLACE X Series and X4I
Gantry Edition 01/2009 EN
224
6.4.1.2 Measuring the Digital Zero Pulse Signal
6-16: Measurement procedure for checking the digital zero pulse signal and the digital track signals.
NOTE:
You can also use the BNC socket on the axis test box to check the zero pulse signal (inverted
display of zero pulse signal). The digital signals can be checked (for error location) at connectors
X10 and X24 of the gantry and at the head interface (calculate extra time for Y axes,
dismounting the covers).
NOTE:
The procedure for measuring the digital zero pulse is identical to that for measuring the analog
zero pulse.