
B-63945EN/02 11.TROUBLESHOOTING
- 585 -
The following failure is considered:
- Timing belt is broken
- Key is removed
- Coupling is loose
- Connector of signal cable is loosened
(ii) Position coder is faulty
(c) Thread cutting does not operate
(i) Position coder does not rotate
Check the connection between spindle and position
coder
The following failure is considered:
- Timing belt is broken
- Key is removed
- Coupling is loose
- Connector of signal cable is loosened
(ii) Position coder is faulty
Position coder is connected to the spindle amplifier
when serial interface spindle is used or connected to
the CNC when analog interface spindle is used.
For details of connection, refer to the following.
Whether A/B phase signals from the position coder are read
correctly, can be judged also by the spindle speed display
on the screen (position screen).
(However, it is not displayed when parameter DPS (No.
3105#2) is se to 0).
• αi series spindle amplifier
CNC
JA41
JA7B
JA7A
JYA3
SPM
JA7B
JA7A
JYA3
SPM
Position coder
Spindle motor
Spindle motor
Position coder
(d) A cutting feed block containing a feedrate command (F
command) with a feedrate of 0 is specified.
If the parameter FCO (No.1404#7) is set to 1, alarm PS0011
is not issued even if a feedrate command (F command) with
a feedrate of 0 is issued.