Console user manual
28
01 - 10 - 2004
E. EXTRA INFORMATION
E.1
Problems linked to re-synchronising or reset
The alarms that typically appear in such situations are:
13338 (the rapier/reed encoder moves while the coupling is released)
1064 (start interrupted because pick-finding not completed)
sometimes 13317 and 13318 (error in position and tracking)
Parts of the loom to be checked:
1) Hi Drive coupling coil: if the coil does not react in any way (no typical click or no movement
seen when you remove one of the access caps on the coupling’s toothed wheels) during re-
synchronising (including manual re-synchronising), check that the power supply actually reaches
the coil (roughly 30-33 V, holding) and check that the coil circuit has not been cut.
2) If the coupling anchor is engaged, but then released immediately afterwards, check:
- the encoder play (see “Detecting play in the encoder joints”, parag. A.13)
- the coupling gap (this must be 0.8 mm)
- the efficiency and adjustments of the encoders and the sensors (see below: “Encoder and
sensor efficiency test”)
3) If, when you remove a cover on the coupling, you see that the two toothed wheels turn at the
same time even with tooth against tooth, check the coupling gap.
4) If re-synchronising takes place (the dobby shaft completes one full turn), but is not successful
(the 4 warning lamps stay on), check the efficiency and adjustments of the encoders and
sensors (see below: “Encoder and sensor efficiency test”.
5) If manual re-synchronising is successful, but automatic re-synchronising often fails after a
continuous running command, there might be a problem with the auxiliary encoder. Go to the
Hi Drive page to find the auxiliary encoder angle. Give several start/stop commands at con-
tinuous running and note the value of the encoder degrees during the stop. If, for example, at
the end of the stop slow-down the auxiliary encoder degrees are cleared (but the loom is not at
0°), it’s likely that there is interference in the auxiliary encoder zero signal: check the cabling for
this signal and board BCS.
One likely cause for malfunctioning during re-synchronising is
excessive play in the encoder
joints
. See parag. A.13 “Detecting play in the encoder joints”.
