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11 Benchmark Test  108 Technical Training E by DEK 12/2017 Our Goal Exercise Identify common causes of poor performance With the instructor, discuss the typical causes and solutions to any poor results. Summery of Adjus…

11 Benchmark Test



Technical Training E by DEK 12/2017 107

Perform Benchmark Test and record results

Apply small amount of paste or suitable lubricant to stencil to lubricate squeegees.

Run QC-Calc package on printer.

Carry out a minimum of 100 full machine cycles.

On completion of the test record the following information:

Front Print Speed Cp/Cpk = ………………………………………………………….

Rear Print Speed Cp/Cpk = ………………………………………………………….

Separation Speed Cp/Cpk = ………………………………………………………….

X alignment Cp/Cpk = ………………………………………………………….

Y alignment Cp/Cpk = ………………………………………………………….

Theta alignment Cp/Cpk = ………………………………………………………….

Front Pressure Cp/Cpk = ………………………………………………………….

Rear Pressure Cp/Cpk = ………………………………………………………….

NOTICE

Error message

The error message "No variation in selected data – Increase significant digits" may appear

for pressure and speeds due to the lack of variation. In this instance, no values are re-

quired.

Exercise

Identify the arrowed items below:

11 Benchmark Test



108 Technical Training E by DEK 12/2017

Our Goal

Exercise

Identify common causes of poor performance

With the instructor, discuss the typical causes and solutions to any poor results.

Summery of Adjustment

Board move- Rail parallelism Reduce board width 1mm

Fiducial capture Try video model mode

Board move – belts Remove tooling

Print carriage bearings Run dry align

Screen move –Chase clamps Disconnect chase clamps –no pressure

Calibrations Calibrate

Screen move - Stretch Try new screen

12 The Perfect Print

12.1 The Perfect Print

Technical Training E by DEK 12/2017 109

12 The Perfect Print

12.1 The Perfect Print

It is important that the Technician understands which areas under their control can have a direct

influence over the print quality and how to identify a defect and quickly rectify the problem.

A perfect print is characterized by:

●

Machine critical assemblies flat and level

●

Critical machine settings within tolerance

●

Machine calibrated

●

Machine clean and well maintained

12.2 Exercise

Shown below are some common solder print defects. Suggest some machine related causes of

these defects.

Bridging

Causes:

……………………………………………………