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6 Print Head 6.2 Print Cycle Technical Training E by DEK 12/2017 51 6.1.4 Analysis Common error list Error Description Possible Cause Action Squeegee print problems during first production new product ● Calibration requi…

6 Print Head

6.1 Squeegee Module

50 Technical Training E by DEK 12/2017

6.1.3 Parts Exchange / Settings / Calibrations

6.1.3.1 Parts Exchange / Settings / Calibrations

Squeegee Parts Exchange Tools/ Setting Calibration

Strain Gauge or Node 3 Strain Gauge calibration jig

●

Squeegee pressure

feedback calibration

Drive Belt Force Meter with hook 3-4 kgs

Stepper motor Force Meter with hook 3-4 kgs

Stepper drive card DIP switch settings

For further details please refer to the technical reference manual.

6.1.3.2 Squeegee Calibrations

Fig.5: Menu for setting up and calibrating the Squeegee home positions

6 Print Head

6.2 Print Cycle

Technical Training E by DEK 12/2017 51

6.1.4 Analysis Common error list

Error Description Possible Cause Action

Squeegee print problems during

first production new product

●

Calibration required

●

Incorrect PCB height

●

Incorrect tooling

●

Calibrate squeegee height

●

Check PCB height

●

Check tooling

●

Calibrate strain gauge

(special tools required

Sporadic squeegee errors (after

the above has been done)

Mechanical wear

●

Check spindle movement

●

Check squeegee blades

●

Check squeegee paste

deflectors

●

Check strain gauge

diagnostic to see if

measurements are

repeatable

●

Replace strain gauge /

squeegee head / print

carriage node

6.1.5 Maintenance

Maintenance tasks for squeegee.

Maintenance content Interval Requirement

Check and clean surfaces daily IPA wipes

Inspect wiring and connections 3 monthly

Lubricate Bearings 3 monthly THK AFB grease

Grease gun

Clean and Lubricate Super nuts and lead screws 3 monthly Aeroshell 5 (only)

Check condition and belt tension drive belts 3 monthly Force meter 3-4 kgs

Cycle squeegee over travel range to ensure smooth running 3 monthly

For detailed information refer to the maintenance manuals.

6.2 Print Cycle

6 Print Head

6.3 Exercise

52 Technical Training E by DEK 12/2017

6.3 Exercise

Maintain the Squeegee Head Assembly

Perform the following task:

► Go to diagnostics and enter squeegee menu.

► Observe the current pressure reading.

► Place a known weight (example paste pot) on the top of the squeegee mechanism and

observe the new reading.

Has the pressure reading changed according to the added weight:

⃞ Perform a squeegee pressure calibration.

⃞ Perform squeegee height calibration. (version 9 only)

⃞ Describe the squeegee head theory of operation using module schematic.

Describe the squeegee head theory of operation using module schematic:

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