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5 Product File and Machine Setup 5.6 Set up Basic Process Parameters to Ensure Acceptable Quality Prints 38 Process Foundation DEK Micron-Series 12/2017

5 Product File and Machine Setup

5.6 Set up Basic Process Parameters to Ensure Acceptable Quality Prints

Process Foundation DEK Micron-Series 12/2017 37

Separation Distance

This should be the minimum required to allow the paste to clear the stencil at the programmed

separation speed. If the separation speed is set to maximum, then the distance doesn’t really

matter so should be set to its lowest value. If the separation speed is slow then the separation

distance should equal the stencil thickness plus a little extra to account for any stencil stretch.

Again, this parameter could have a large effect on the cycle time.

Print Gap

This should always be set to zero when using solder paste. There are other applications that do

use a gap, for instance: adhesive or ink printing. Refer to the appropriate applications training

modules for details.

Exercise

The objective is to edit the product file to be capable of printing five consecutive boards at the print

speed stated below with each board exhibiting zero print defects.

Note: At this stage there are no overheads to be considered from under-screen cleaning, vision

inspection, etc.

Determine, through experimentation, the best print parameter settings to successfully achieve the

objective. Record your results in the table below:

Squeegees

Print Speed 20mm/s

Squeegee Pressure

Separation Speed

Separation Distance

Notes:

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5 Product File and Machine Setup

5.6 Set up Basic Process Parameters to Ensure Acceptable Quality Prints

38 Process Foundation DEK Micron-Series 12/2017

6 Process Maintenance

6.1 Copy and Delete Product Files

Process Foundation DEK Micron-Series 12/2017 39

6 Process Maintenance

6.1 Copy and Delete Product Files

Copy and Delete Product Files

There are several reasons why good housekeeping is important with regards to product

files:

●

If the hard disk crashes or there is a software corruption it is relatively easy to replace or

reformat the hard drive and load the windows and DEK software. If all the product files have

been backed up then the machine will be ready to go back into production very quickly

●

If product files are copied onto an appropriate media they can then be transferred to other

DEK printers

●

If there are too many product files on the printer it makes it difficult to find the one you want

and can increase the chance that the wrong one is selected

Depending on the machine type, the options that may be available for COPYING files include

floppy disc, USB memory stick and local area network. In addition, it is possible to PRINT a product

file directly onto paper by connecting a printer to the serial or USB port or alternatively PRINT to file

then transfer to a PC connected to a printer.

Exercise

1. Copy a product file from the printer to a USB memory stick

2. Delete the same file from the printer

3. Copy the same file from the memory stick back onto the printer

4. Print a hard copy of the same file onto paper

Note: Printing creates an ASCII copy of the product file that can then be printed and stored on

record or kept close to the printer as a reference for the operators and technicians to

know what the process parameters should be.

Notes:

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