MINUTEMAN 320
20
REV 13.1:2020
a crash between the lathe and bar feeder. If the M-code for bar change or feed is never
satisfied, it may be an issue with the cycle start signal being set backwards.
The first way to correct this issue would be to change the status of the jumper or wire that is
controlling the cycle start signal. Change the status of the signal and test the machine cycle
again. If this does not work then check continuity.
Automatic mode (Automatic mode ON, Bar feeder ready for work, spindle interlock)-
When wired, this signal is to ensure that the lathe does not run without the bar feeder being in
automatic mode. There are other ways that the lathe will react when the automatic signal from
the bar feeder is not being sent. Some lathes will generate an alarm when the lathe is put into
“memory mode”, a spindle interlock alarm may show up when attempting to rotate the spindle,
or a “bar feeder Torque off” alarm is common.
To test functionality of the signal, the bar feeder should be put into automatic mode first. IF the
signal to the lathe is correct the program should run through, spindle should also be able to
rotate. IF bar feeder is in manual, an alarm should be present when attempting to run the lathe
program or rotating spindle.
To correct the automatic signal on Edge products, a wire may need to be moved in a terminal
block. If this does not fix the issue then check continuity.
End of bar (bar end, block delete, program stop)- End of bar signal is sent from the bar
feeder to the lathe. The lathe needs to know that the bar feeder has reached the specified limit
position of the pusher. This position is set in the bar feeder factory settings. The signal can be
sent multiple ways at different durations.
If the end of bar signal is set incorrectly the bar feeder will prematurely tell the lathe that the bar
feeder is out of material. When running the lathe in automatic operation, the lathe will constantly
acknowledge the end of bar signal and try to change bar.
Ensure that the correct end of bar position is set in the bar feeder parameter settings. If the
position is set incorrectly it will send the signal at the incorrect time. This incorrect position can
be short and cause long remnants or too long and never send the end of bar signal.
To correct the signal on Edge products, a wire may need to be moved in a terminal block. If this
does not fix the issue then check continuity. Also ensure your end of bar position is set correctly
in the bar feeder settings.
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