00197787-02_SI_SIPLACE_HeadVerification_EN.pdf - 第42页

6 Description of the test results 6.4 Anti-glare shield mounting 42 Software Manual SIPLACE Head Verification 03/2018 6.4 Anti-glare shield mounting 6.4.1 Measurement principle The anti-glare shields are a key part of th…

6 Description of the test results

6.3 Air & vacuum with external sensor

Software Manual SIPLACE Head Verification 03/2018 41

9 Zero deviation shows the difference between Median

Air external

and Air external:

Zero deviation = Median

Air external

- Air external

10 Result view indicating if the values are within (green tick) or outside (red cross) the limits.

11 Values of the Rev. voltage measurement show the reference voltage during the measure-

ment. Always check for a low reference voltage as otherwise this can limit the available

measurement range.

12 Graph showing the Air external (blue) and Air head (green) values for each segment.

13 Graph showing the Delta air values for each segment.

14 Graph showing the Vacuum external (blue) and Vacuum head (green) values for each

segment.

15 Graph showing the Delta vacuum values for each segment.

6.3.3 Interpretation of the results obtained

‘Vacuum head’ ok / ‘Vacuum external’ error for all segments

Cause Solution

External vacuum filter defective ► Check / exchange the external sensor.

‘Vacuum head’ ok / ‘Vacuum external’ error for individual segments

Cause Solution

Sealing damaged / poor air-tightness at the

nozzle seating

► Replace the filter disks.

Nozzle worn or damaged ► Replace the nozzle.

Vacuum hose to the affected segment polluted

or damaged

► Replace the vacuum hose.

Holding circuit polluted ► Maintain or clean the holding circuit in an

ultrasound bath.

6 Description of the test results

6.4 Anti-glare shield mounting

42 Software Manual SIPLACE Head Verification 03/2018

6.4 Anti-glare shield mounting

6.4.1 Measurement principle

The anti-glare shields are a key part of the C&P20A head, required to trigger the Z-axis bottom

light barrier. The measurement checks the correct mounting and the condition of the anti-glare

shields.

During the measurement, all segments are rotated in increments of 90° while, at the same time, the

Z-axis bottom light barrier voltage is measured. If an anti-glare shield is not mounted properly,

damaged or polluted, the voltage signal will drop immediately.

6.4.2 Measurement result

Fig.36: Result view – Anti-glare shield mounting

1 Measured Segment

2 The Mounting variation describes the eccentricity (rotation) of the anti-glare shield to the

central axis of the segment and is calculated from measure 1-4:

Mountingvariation = Measure1-4(max) – Measure1-4(min)

3 Result view indicates if the values measured are within (green tick) or outside (red cross)

the limits.

4 Mountingvariation(max) is the max. limit allowed for the mounting variation.

5 Analog voltage determined for each segment at 0°, 90°, 180° and 270° (Measure1-4).

6 The Sensorvalue(max/min) defines the limits for the four measured values (Measure

1-4).

7 Graph showing the Mounting variation.

8 Graph showing the values measured at 0°, 90°, 180° and 270° (Measure 1-4).

6 Description of the test results

6.4 Anti-glare shield mounting

Software Manual SIPLACE Head Verification 03/2018 43

6.4.3 Interpretation of the results obtained

‘Mounting variation’ error for all segments

Cause Solution

Incorrect position of the Z-axis bottom light bar-

rier

► Readjust the Z-axis bottom light barrier

position.

Z-axis bottom light barrier defective (all values

shown in Measure 1 - Measure 4 are below the

limit).

► Replace the complete Z-axis unit including

the bottom light barrier.

Z-axis motor or linear guide defective. ► Replace the complete Z-axis unit.

‘Mounting variation’ error for individual segments

Cause Solution

Anti-glare shield polluted, with fractures or sit-

ting improperly at the DP station.

► Realign or replace the anti-glare shield.

‘Measure 1-4’ error for multiple segments (not concave / not convex)

Cause Solution

Cable breakage at Z-axis down light barrier bot-

tom.

► Replace the Z-axis down light barrier bot-

tom.