00194614-08 Trainingsdoku. SG X-Serie_X4i SW70x (AL2)_EN - 第232页

C&P20A Height Reference R un Reference Run for C&P20A Head Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 232 Sequence o f Height Reference Run 7.3.6.1 Sequence of Height Reference Run Height re ference run fl…

C&P20A

Reference Run for C&P20A Head Height Reference Run

231 Student Guide SIPLACE X-Serie and X4I SW70x (AL2)

Measuring the nozzle height

Legend

▪ The gantry moves the placement head to the fixed conveyor side at height measurement position.

▪ The star turns the segment for measuring into the pickup/placement position

▪ The value "Vacuum open" is measured for each segment.

The Z axis is positioned downwards:

▪ When the component sensor beam is interrupted, the Z position of the axis is determined for the

component sensor.

▪ When the Z axis touches the conveyor side, the mechanical nozzle length is determined by the Z

position value and the closed vacuum value is measured.

The Z axis is positioned upwards:

▪ When the component sensor beam is no longer interrupted, the Z position of the axis will be

measured again for the component sensor.

1 Top edge of the fixed conveyor side 3 Last step with segment 20 to measure the

nozzle length.

2 First step with segment 1 to measure the

nozzle length.

C&P20A

Height Reference Run Reference Run for C&P20A Head

Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 232

Sequence of Height Reference Run

7.3.6.1 Sequence of Height Reference Run

Height reference run flow chart

C&P20A

Reference Run for C&P20A Head Determining the Vacuum and Threshold Values

233 Student Guide SIPLACE X-Serie and X4I SW70x (AL2)

Determining the Vacuum and Threshold Values

7.3.7 Determining the Vacuum and Threshold Values

Measuring and calculating the vacuum values for a reference run

▪ The vacuum is measured twice at the reference point: first with open and then with closed nozzle

tips.

▪ The value with closed segment does no longer depend on the ambient pressure it is controlled by

the pressure control valve. The nozzle fit (nozzle pickup error) and the quality (contamination/

damage) of the nozzle tip influence the vacuum measurement values.

▪ The value by open pressure control valve depends on the nozzle size and condition. The smaller the

nozzle, the greater the open valve value will be. This nozzle-specific value is preset by the SIPLACE

Pro computer. A contaminated or blocked nozzle will also give a higher valve.

▪ The difference between the open and closed nozzles has been preset by the programming system

as an ideal case minimum value. This value is different for all nozzle types e.g. 120 mbar for 1004,

1014 nozzles. If these values are not achieved, the error message “Vacuum difference open-closed

is too low” will appear.

▪ The threshold for component acceptance is also set now. Assumed are following values for a 1004

nozzle: a value of 660 mbar when the nozzle is open and a value of 852 mbar when the nozzle is

closed. The calculation is performed as follows:

Vacuum distance = (852 (closed) - 660 (open))= 192 mbar

This is greater than the vacuum distance required in the parameter specifications for this nozzle type

(120 mbar). The open vacuum of 660 mbar is significantly greater than the required 250 mbar.