00197787-02_SI_SIPLACE_HeadVerification_EN.pdf - 第77页

6 Description of the test results 6.20 Segment offset up & down Software Manual SIPLACE Head Verification 03/2018 77 10 The segment offset dyDown is calculated from the mean value of the segment to the component cam…

6 Description of the test results

6.20 Segment offset up & down

76 Software Manual SIPLACE Head Verification 03/2018

6.20.2 Measurement result

Fig.54: Result view – Segment offset up & down

1 Measured Segment

2 A different calculation of the segment offset UpX is used for segment 1 and all other seg-

ments.

For segment 1, UpX is calculated from the mean value of the measured Xoffsets (compo-

nent to PCB camera) at an angle of 0°, 90°, 180° and 270°, and the value dxUp:

UPX

Segment 1

= MeanOffsetX

0°, 90°, 180° and 270°

+ dxUp

Segment 1

For all other segments, UPX is calculated using segment 1 as a reference position:

UPX

Segment n

= UPX

Segment 1

- (dxUp

Segment 1

– dxUp

Segment n

)

3 The segment offset UpY is calculated following the same principle as for UpX:

UPY

Segment 1

= MeanOffsetY

0°, 90°, 180° and 270°

+ dyUp

Segment 1

UPY

Segment n

= UPY

Segment 1

- (dyUp

Segment 1

– dyUp

Segment n

)

4 The segment offset DownX is calculated following the same principle as for UpX:

DownX

Segment 1

= MeanOffsetX

0°, 90°, 180° and 270°

+ dxDown

Segment 1

DownX

Segment n

= DownX

Segment 1

- (dxDown

Segment 1

– dxDown

Segment n

)

5 The segment offset DownY is calculated following the same principle as for UpX:

DownY

Segment 1

= MeanOffsetY

0°, 90°, 180° and 270°

+ dyDown

Segment 1

DownY

Segment n

= DownY

Segment 1

- (dyDown

Segment 1

– dyDown

Segment n

)

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

7 The segment offset dxUp is calculated from the mean value of the segment to the compo-

nent camera center at an angle of 0°, 90°, 180° and 270°.

8 The segment offset dyUp is calculated from the mean value of the segment to the compo-

nent camera center at an angle of 0°, 90°, 180° and 270°.

9 The segment offset dxDown is calculated from the mean value of the segment to the

component camera center at an angle of 0°, 90°, 180° and 270°.

6 Description of the test results

6.20 Segment offset up & down

Software Manual SIPLACE Head Verification 03/2018 77

10 The segment offset dyDown is calculated from the mean value of the segment to the

component camera center at an angle of 0°, 90°, 180° and 270°.

11 Graph showing the segment offset UpX (abscissas) and the segment offset UpY (ordin-

ate).

12 Graph showing the segment offset DownX (abscissas) and the segment offset DownY

(ordinate).

13 Additional parameters comparing the smallest and largest value determined.

●

Up X = UpXmax – UpXmin

●

Up Y = UpYmax – UpYmin

●

Down X = DownXmax – DownXmin

●

DownY = DownYmax – DownYmin

6.20.3 Interpretation of the results obtained

‘Up X’ and ‘Up Y’ error for all segments:

Cause Solution

Incorrect Zero point correction of the star. ► Check the zero point correction of the star.

‘Down X’ and ‘Down Y’ error for all segments:

Cause Solution

Linear bearing of the Z-axis loose or defective. ► Check / replace the Z-axis.

‘Up X’, ‘Up Y’, ‘Down X’ and ‘Down Y’ error for individual segments:

Cause Solution

Segment bent, possibly after crash. ► Replace the segment (DP).

Linear bearing of segment defective ► Replace the linear bearing (DP).

6 Description of the test results

6.21 Segment offset up (SOO)

78 Software Manual SIPLACE Head Verification 03/2018

6.21 Segment offset up (SOO)

6.21.1 Measurement principle

The Segment offset up measurement checks the degree to which a segment is outside of its rota-

tion axis in the top position. This eccentricity is also known as segment offset up.

Segment offset up is the offset of the segment center in the up position to the center of the

component camera.

The measurement is performed for each segment in the top position at four angles (0°, 90°, 180°

and 270°) to determine the exact rotation and to calculate the influence of the segment / Z-axis lin-

earity.

NOTICE

Segment offset down not available at the HCS

The Segment offset down measurement requires a stationary camera which is not available

at the HCS. Therefore, this test is only available with the online verification.

NOTICE

Termination of test sequence

If a measurement shows a segment outside the allowed limits, all subsequent measure-

ments will be terminated. It is assumed that the segment is seriously deformed and that the

head is no longer able to perform.

► Replace the segment immediately before performing other measurements.