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SMEMA Conveyor into Reflow Oven? How to handle end of line signal.

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Tom

#74854

SMEMA Conveyor into Reflow Oven? How to handle end of line signal. | 10 November, 2015

How is a board conveyor typically configured to unload into a conveyor oven if there is no downline machine to five a ready to receive signal? Do you just use a plc to activate the machine ready signal at a timed interval? Would you perhaps do the same thing for beginning of line with board ready to send signal? Thanks for any help.

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#74857

SMEMA Conveyor into Reflow Oven? How to handle end of line signal. | 10 November, 2015

What is your goal? To keep feeding boards regardless,or to stop feeding boards if they are not coming out?

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Tom

#74885

SMEMA Conveyor into Reflow Oven? How to handle end of line signal. | 15 November, 2015

I presume start by having it just pass into oven as soon as it is given a board from the placement machine. If I find I need to pace the boards into the oven it seems a basic PLC would be needed? Thanks for the help.

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Tom

#74916

SMEMA Conveyor into Reflow Oven? How to handle end of line signal. | 20 November, 2015

To clarify- what I have is:

1. Manual stencil print process 2. Dynapace conveyor into GSM 3. Dynapace conveyor out of GSM into oven

So what I need is a way to tell the conveyor into the placement machine to "go" when a board is loaded onto it after the manual stencil print, and a way to have the conveyor out of the placement machine unload into an oven (that has no smema interface.)

So far my thought is to have a button close the upline 'board ready to send' contacts for the infeed conveyor when the operator loads a printed board, and a timer(plc) close the downline 'machine ready to receive' contacts for the exit conveyor to pace boards into the oven.

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#75130

SMEMA Conveyor into Reflow Oven? How to handle end of line signal. | 29 December, 2015

Hi Tom If the DYNAPACE has SMEMA out all you need to do is place a two wire jumper into pins 3&4 or 1&2 depending upon DYNAPACE's SMEMA configuration. This will by-pass a Release signal and feed PCBs into the oven.

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Tom

#75131

SMEMA Conveyor into Reflow Oven? How to handle end of line signal. | 29 December, 2015

Hi Gary,

Thanks for the tip, I'll give that a shot!

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#75132

SMEMA Conveyor into Reflow Oven? How to handle end of line signal. | 30 December, 2015

Tom,

Mount one sensor at about 6 inch inside of the beginning of the oven conveyor and use its output as ready to accept the board signal. That 6 inch distance will give you timing and space between two boards entering in the oven.

Tushar

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Tom

#75133

SMEMA Conveyor into Reflow Oven? How to handle end of line signal. | 30 December, 2015

Hi Tushar,

That is the conclusion that I was coming to before Gary's suggestion. I think a sensor will probably be the best solution but it is good to have options and back-up plans.

Thanks everyone

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Reflow Oven