LNS GT 326-E, Instruction Manual, Page: 123 / 218

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9 TROUBLESHOOTING GUIDE
GT 326-E
AL08 Guiding Channel Close Failure! (SQ4)
Description
When the bar feeder guiding channel starts closing
(PLC Output Y06 ON) 5.0 seconds later the channel
closed switch SQ4 signal is not present or if the channel
open switch SQ3 signal remains ON.
Troubleshooting
1. Check if there is something preventing the guiding
channel to close.
2. Check if switch SQ4 is defective of misadjusted.
3. Check if the air pressure is too low or if the channel
closing air cylinder is too slow.
4. Press
“STOP” button on HMI to clear the alarm.
AL09 Measuring Cell Failure!
Description
When the bar feeder is in automatic mode and ready for
feeding the bar to
“TOP CUT POSITION" the switch
SQ1 signal does not reset (SQ1 OFF).
Troubleshooting
1. Check if the bar stock is present or for mechanical
interference with the bar measuring device.
2. Check if the bar measuring device is lose.
3. Check if the bar measuring device cylinder is
defective.
4. Check if the bar measuring device switch SQ1 is
defective of misadjusted.
5. Press
“STOP” button on HMI to clear the alarm.
AL10 Home Position Switch Failure! (SQ2)
Description
When the pusher is at home position and the current
position reading is
“0”, switch SQ2 signal is not present.
Troubleshooting
1. Verify if the pusher is physically at home position
and then check if the switch SQ2 is operational.
2. If the pusher is not physically at home position the
servo motor encoder may be defective.
3. Press
“STOP” button on HMI to clear the alarm.