Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Printing Problem

steve

#31429

Printing Problem | 19 November, 2004

A customer of mine is having problem. They can't control their humidity. It is very dry. RH averages 28-30%. The water soluble solder paste prints great. But dries out on metal squeegee. Any suggestions.

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#31435

Printing Problem | 19 November, 2004

The R.H of 28-30% is too low! (What about ESD issues?).

Have them check to see if the printer/print area has a "breeze blowing" accross it, they can disconnect fans inside if needed to limit airflow from drying the paste out.

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#31441

Printing Problem | 19 November, 2004

Hi,

Try using/installing a dihumidifier machine besides the printer. It will solve the problem. Please reduce the airflow in the area.

Arman

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Steve

#31444

Printing Problem | 19 November, 2004

someone stated to me that they could change their squeegee blade from stainless steel to nickel coated? and even Teflon coated. Agree? disagree?

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#31445

Printing Problem | 19 November, 2004

If it is a MPM printer you can install the environmental control unit. But it isn't as simple as most people thinks. You also have to install a thermostat inside the machine. Then there is a wire that is used to turn it on and off, this wire is from the thermostat to the control unit. Then this option must be turned on, this means you must get into the option file. You will find that the unit, wireing and termostat can be difficult to find, the ones that don't work is easy working one's some times require a little money and searching. One hint is don't buy a small environmental control unit, they don't work to well. harry

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#31448

Printing Problem | 20 November, 2004

Steve,

Agree.

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Steve

#31449

Printing Problem | 20 November, 2004

No,No, Grayman it is "I concure"!!

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#31450

Printing Problem | 20 November, 2004

Steve,

what do you mean by "concure"? I have asked Webster and I can not find the word...

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bobpan

#31453

Printing Problem | 20 November, 2004

You would find it if its spelled wright....oops....hahah....anyways....concur

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#31455

Printing Problem | 20 November, 2004

Thank you very much...... Hahaha. have a nice day : )

Thanks!

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Rob

#31458

Printing Problem | 22 November, 2004

Hi Harry,

We had some of the ECU's, but all they are is a heater & a chiller, and the controller turns on whichever one is required. Unfortunately the contollers were pants so our lab made their own.

Rob.

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Reflow Oven