00195193-02 SG D4 FSE en (1) - 第119页

Reference run Reference Run C&P12 Sequence vacuumcheck S tudent Guide SIPLACE D4 (FSE) Reference run EN 09/2006 11 2 5.3.8 Sequence vacuumcheck 5.3.9 Determining the V ac uum and Threshold V alues 5.3 - 2: Measuring …

Reference run

Completion of the Z-axis reference run Reference Run C&P12

Student Guide SIPLACE D4 (FSE)

EN 09/2006 Reference run

111

5.3.6 Completion of the Z-axis reference run

5.3.7 Reference Run at Dp-axis

The function of the DP axis is, to turn the nozzle in the correct pick up angle. After the component

recognition the DP-axis turn the components in correct placement angle.

C&P reference run completed!

This is followed by the gantry reference run (see section Gantry).

 The star axis rotates to 6250/6750 digits. At

these positions, there is a segment ball

bearing between the Z-axis claw and the

circular arc. guide. The various different star

positions compensate a Z-0 correction angle

error.

 The Z-axis moves to the bottom end position

stop for the 1st star position and to thetop end

position stop for the 2nd star position.

 The average value of these results is

calculated and sent to the axis control system

as a negative reference value (ZPC).

 Star-axis is moved back to reference position.

 The Z-axis restarts the reference run with the

new zero point correction value.

 The segment now in the DP-station is turned to

reference position. (segment 5 for 12 nozzle

head.)

 Sequence: the DP-station swivels in. The axis

starts and searches for the zero pulse. The

DP-station swivels out after the end signal.

 The swiveling function is controlled by the

CAN-Bus.

 The rotation of the sleeve is regulated by the

axis controller, which contains the DP position

encoder.

 The zero point correction on the DP-axis is

always 0 (because up to 12 segments are

operated by one drive).

Reference run

Reference Run C&P12 Sequence vacuumcheck

Student Guide SIPLACE D4 (FSE)

Reference run EN 09/2006

112

5.3.8 Sequence vacuumcheck

5.3.9 Determining the Vacuum and Threshold Values

5.3 - 2: Measuring and calculating the vacuum values for a reference run

Contaminants and components are released or

removed and nozzles are rotated to 0°.

 The gantry axes move the Collect & Place

head to the reject position.

 The star axis moves counterclockwise and all

three functions are performed within one head

cycle.

1. The DP-station is swiveled in and turns each

segment to 0° position.

2. The air kiss valve is opened, the valve drive of

the reject position is activated and switches

between open and closed. Anything on the

nozzle is rejected. The air kiss valve is closed.

The gantry axes move the Collect & Place

head to the fixed conveyor side.

3. where the vacuum reference values are

measured at the pickup/placement station.

These are the reference values for each

segment for the vacuum checks during

placement.

Reference run

Measuring Nozzle Lengths for Component Recognition by the Component Sensor Reference Run C&P12

Student Guide SIPLACE D4 (FSE)

EN 09/2006 Reference run

113

Legend

1. The vacuum is measured twice at the reference point: once with closed and once with open valve,

while air flows through the nozzle.

2. The value with closed valve depends on the ambient pressure and may vary significantly, according

to the local weather conditions and altitude. The higher the ambient pressure, the lower the vacuum

at closed valve.

3. The value by open valve depends on the nozzle size and condition. The smaller the nozzle, the

greater the open valve value will be. A contaminated or blocked nozzle will also give a higher valve.

4. The difference between the open and closed nozzles has been preset by the line computer as an

ideal case minimum value. This value is different for all nozzle types e.g. 120 mbar for 714, 704, 914

and 904 nozzles. If these values are not achieved, the error message "Vakuumdifferenz offen-

geschlossen zu gering" (vacuum difference open-closed is too low) will appear.

5. The threshold for component acceptance is also set now. In this case we have a value of 700 mbar

when the nozzle is open and a value of 900 mbar when the nozzle is closed. The calculation is

performed as follows:

Threshold = (900(closed) - 700(open))= x 0.2 + 700(open) = 200 x 0.2 + 700 = 740

5.3.10 Measuring Nozzle Lengths for Component Recognition by the Component

Sensor

The component sensor option can only be used with machine stations SW 503 or higher and only with

12 nozzle C&P placement heads.

If the CO sensor option is installed on the C&P12, the following will be performed during the vacuum

reference run:

 The length of the nozzle in the IR beam will be measured during star revolution.

 The SIPLACE Pro/LC defines which nozzle type can be measured (nozzle lengths longer than

12 mm). Nozzle setup on the placement star triggers measurement.

 Before pickup, the length of the empty nozzle is compared to the value measured during the

reference run.

 During the placement process, component recognition refers to the empty nozzle measurement

value before placement is performed.

Legend:

1. IR receiver

2. Nozzle

3. IR transmitter