1 Troubleshooting
1.3
Checking method and
r
remedy of trouble
classification
B
(6) Alarm
NO.~~(NS~)
N
O
Signal 2 (Spindle
ENC)
[The signals of
phases
A, B, and C of the
spindle orientation encoder are checked
during orientation and synchronous tapping
state.1
Item Cause Check
Remedy
The cable
(MR-ZOLF)
to
D
Observe the signal waveform
o
Replace the cable to the
the spindle orientation
from the encoder using an
encoder with the new one.
encoder is defective. oscilloscope. (See Appendix 3
(2j.l
o
Check the check pins on the
printed circuit board SF-TL
card.
.
Between
CHl
and DGA, for
phase A
1
.
Between CH2 and DGA, for
*
phase B
.
Between CH3 and DGA, for
phase
2
(See Appendixes
6(3)
and
9(3).)
o
Replace the cable with a new
one and check that the equip-
ment correctly works.
(See Appendix 1
-
7.)
The encoder for the
o
Check the wave form in the
D
Replace the encoder with the
spindle orientation is same manner as Item 1 above. new one.
defective.
2
o
Replace the encoder with a
new one and check that the
equipment correctly works.
(See Appendix 7.)
The printed circuit
o
Observe the signal waveform
o
Replace the printed circuit
board SF-TL card is from the encoder at CONB
board SF-TL card with a
3
defective.
on the SF-TL card using the
new one.
oscilloscope and check that
(See Section
2.4.3.)
it is normal.
(See Appendix 1
-
7.1
o
Repair the power supply on
The 5V power is not
o
Check the 5V power on the
the NC side.
supplied from the NC NC side.
Refer to M300 series
side to the encoder.
o
Replace the cable with a new
Maintenance
manual
one and check that the
equip-
o
Replace the cable with a new
ment correctly works.
one.
o
If the 5 V power is not
sup-
4
plied from the NC side
(namely,
when CONAA is not
connected with the NC),
shortcircuit the pin 5 on
the SF-TL card to pins 2 and
3 (no power supply form the
NC).
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26
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