21
3 Installation onto the Machine Main Unit
No. 99MBE048B
Adjusting the origin signals
If the scale has multiple origins, adjust the origin signals at the origin (one position) you use.
1
Set the oscilloscope as follows.
Item
Setting description
Measurement pressure range
0.5 V/div DC mode (50 mV/div when using a 10:1
probe)
Scan mode
T-Y 20 ms
2
Clip the ch1 probe and GND probe of the oscilloscope to the check pin øZ and check pin GND on the
I/F Box board, respectively.
3
Move the center of the Detector to near the scale origin mark on the main scale.
Scale origin mark
4
Move the scale or Detector in the measurement direction.
» When the vicinity of the center of the Detector passes through the scale origin mark, the origin signal waveform is
displayed on the oscilloscope screen.
Pe
ak l
ev
el
≒
2
.2 V
–2
.4 V
Noise level
≒
2.5 V
5
Adjust the noise level of the origin signal waveform to about 2.5 V with the volume on the board.
Main signal output type
Volume to adjust
A (two-phase sine wave)
VR2
B (two-phase square wave + external reset input) VR4
C (two-phase square wave + two-phase sine
wave)
VR4
D (differential 1 Vpp sine wave)
VR2
