LNS GT 326-E, Instruction Manual, Page: 126 / 218

9 TROUBLESHOOTING GUIDE
9 - 11
GT 326-E
AL16 Bar Stock Moving Forward While Headstock Moving Backwards!
Description
This check is activated when the chuck is open during
the machining process. Detection starts by comparing
the current position and the position of pusher while the
chuck is open. If the pusher retracts 4mm back or
exceeds
“Too long collet open”, the alarm will be
generated.
Troubleshooting
1. Check if the bar stock is disconnected from the
pusher collet.
2. Check if
“Too long collet open” setup is incorrect.
3. Check if the transmission mechanism or the chain is
broken.
4. Check if the bar measuring device is malfunctioning
or the cut off tool is broken (if the operator is using
the cut off tool as a stopper).
5. Check if
“End of Bar” position is setup correctly.
6. Press
“STOP” button on HMI to clear the alarm.
AL17 Headstock Travel Shorter Than Expected, The Pusher Lost The Bar Stock!
Description
The bar feeder monitors the pusher moving distance
from the time the chuck closes to the time the chuck
opens. If the distance is shorter than the
“P16: Too short”
setup, this alarm will be generated.
Only valid with Swiss type lathe
<Note> To disable this function <Too short>, set the
value
“0”.
Troubleshooting
1. Check if the bar feed alignment is correct.
2. Check if the lathe chuck is too tight due to the
incorrect size or there are burrs inside the chuck or
on the bar.
3. Check if <Too short> setup on
“PART FEEDING” is
incorrect.
4. Check if
“End of Bar” position setup is incorrect.
5. Check if the headstock synchronization system
works correctly.
6. Check pusher length.
7. Check if bar stock is disconnected from the pusher