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koeya

empty pack system

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hai bro, i try to make empty pack system for packaging machine using twido, and i have problem on rejector, coz sometimes it works sometimes it doesn't, 

does anyone can help me

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a lot more detail is needed. And it sounds like this is a programming issue. 

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yes, Mr. Chud

i'm using scan method using timer, on pic rejector scan, when it detect empty pack it start counter, than the value of counter will trigger the rejector.

its ok, if there's some distance between empty pack, but when it happen continuously, the program doesn't work, it only reject the first and the last.

if the empty pack continuously three times.

could you help me or does anyone can..??

i'm using a ladder programming.

start rejector.png

rejector scan.png

trigger rejector.png

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I would not use a counter.  Look at a bit shift register.  Each time a part is detected, shift in a 0 if it's good, or a 1 if it's not.  Then when the 1 reaches the right place in the word, have it fire the rejector.

Did a similar application on a bottle cap machine years ago, had to reject bad labeled caps about 4 spots after the inspection.

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