GP44 Semi-Automatic Strapping Machine
OPERATION -22-
(PLC input X20) is turned to ON and the strap is detected by the incoming photo eye (PLC input X26). The
auto load solenoid (Sol 7) (PLC output Y22) stays on for a period of time set by the PLC to allow the strap feed
solenoid (Sol 4) (PLC output Y27) to pick up the strap from the auto feed (pool box) rollers.
After the timer expires, the track is no longer present, and the strap then feeds into the pool box.
The strap feed solenoid (Sol 4) (PLC output Y27) fills the arch until strap is detected by the strap end detect
switch (M switch) (PLC input X03).
When the strap end detect switch (M switch) (PLC input X03) is made, the strap feed solenoid (Sol 4) (PLC
output Y27) drops out, while the Pool Box Motor (M5) (PLC output Y23) keeps filling the accumulator box
based on the spring tension setting on the pool box limit lever (PLC input X15).
Once pool box limit lever (PLC input X15) is made, the Auto Loading Motor (M5) turns off and the Reel Brake
is engaged.
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