
B-65382EN/02 START-UP 3.CHECKING FEEDBACK OUTPUT SIGNAL
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Connect the probe GND of the oscilloscope to the reference voltage
T1 (= 2.5 V) then check 0° (phase A) 90° (phase B).
If the coil slider moves in the direction opposite to the power line
extension direction, ensure that the output waveform of the linear
encoder is in the positive direction (phase B is 90° ahead of phase A).
(Fig. 2.1)
Phase A
Phase B
Correct
Fig. 2.1 Waveform where phase B is ahead
Fig. 2.2 shows a waveform pattern where the signal waveform of
phase A is 90° ahead of the signal waveform of phase B. In this case,
the mounting direction of the scale needs to be reversed, or the
connections of phase A and phase B in the signal cable need to be
reversed. For phase reversion, connect phase A and phase B reversely
in cable K5.
Phase B
Phase A
Incorrect
Fig. 2.2 Waveform where phase A is ahead