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SIPLACE Head V erification User Manual Edition 01/2015 54 4.9.2 Explanation of Measurement Results in "Progress" Menu After com pletion of the measurem ent, the following res ults appear in the " Progress&…

SIPLACE Head Verification

User Manual Edition 01/2015

Measurement steps:

1. Firstly, the exact position of the calibration component in the calibration bag is determined with

the PCB camera, as the actual position (the exact center and position), and is then adopted as

the pickup position. This center is determined using 4 points at the corners of the calibration

component.

2. Segment 1 now moves downwards at an angle of 0° and picks the calibration component up

from the pickup position determined (calibration component center).

3. Segment 1 is moved upwards again.

4. Segment 1 is rotated by the star over the component camera.

5. The component camera measures the four calibration component structure fiducials to

determine the exact position of the calibration component to the camera center, thereby

optically centering the calibration component.The offset values determined here are saved as

Up X [µm] and Up Y [µm]. This value now describes the eccentricity of the calibration

component to the camera center.This value provides the "Segment offset up" for segment 1 at

0°, as we can assume that segment 1 picked up the calibration component exactly in the

center. The offset values determined are calculated into the following placement (putdown) of

the calibration component (calibration bag) as correction values.

6. The star now rotates the segment with the calibration component back into the placement

position.

7. Segment 1 and the Z axis are moved downwards and the calibration component is placed in

the calibration bag at an angle of 0° (DP/segment angle) and with the corrected offset values

Up X [µm] and Up Y [µm], as a placement position.

8. The PCB camera now moves over the calibration component and once more determines the

four points in the calibration component corners, to find the exact position of the calibration

component in the bag. This provides the offset values Down X [µm] and Down Y [µm], which

describe the eccentricity of the calibration component to the PCB camera center. This value

describes exactly the offset of the segment 1 center at a placement angle of 0°, when

segment 1 is in the placement position. This provides the exact displacement of segment 1 at

a placement angle of 0°, describing how much the Z linear guide has changed the segment

position at the top to the segment position at the bottom.This deviation also describes the

offset of the component camera to the PCB camera for this segment.

9. The values determined for segment 1 Down X [µm] and Down Y [µm] are taken as an

absolute 0 for all other calculations of all segment offsets. The "Segment offset down" for

segment 1 is the reference value as all other offsets for all other segments refer to this initial

value.

10. The calibration component position determined is now used again as actual pickup position for

the following measurement.

11. Segment 2 now picks up at 0°.

12. Steps 2-10 are performed for all segments.

13. The calibration component stays in its position at 0° for the entire measurement and does not

change its angle!

SIPLACE Head Verification

User Manual Edition 01/2015

4.9.2 Explanation of Measurement Results in "Progress" Menu

After completion of the measurement, the following results appear in the "Progress" menu:

Figure 36: Segment offset up and down (fast) result

Legend:

1. Segment measured

2. Calculated "Segment offset up" value Up X [µm] from measurement at an angle of 0°. This

deviation is determined with the value dx Up [µm] (7), as the actual segment offset measured

to the component camera center. The calculated "Segment offset up" value Up X [µm] is

calculated from the offset between the component and PCB camera.

The segment offset values Up X [µm] determined must always be in a certain tolerance range

(in our example -290..290µm). This value defines a permissible segment offset within the

construction and production tolerances, which can still be compensated by the software. If the

segment offset values are outside the tolerances, we can assume that the segment has been

mechanically deformed, so that it has been bent and is no longer suitable for accurate

placement.

3. Calculated "Segment offset up" value Up Y [µm] from measurement at an angle of 0°. This

deviation is determined with the value dy Up [µm] (8), as the actual segment offset measured

to the component camera center. The calculated "Segment offset up" value Up Y [µm] is

calculated from the offset between the component and PCB camera.

The segment offset values Up Y [µm] determined must always be in a certain tolerance range

(in our example -290..290µm). This value defines a permissible segment offset within the

construction and production tolerances, which can still be compensated by the software. If the

segment offset values are outside the tolerances, we can assume that the segment has been

mechanically deformed, so that it has been bent and is no longer suitable for accurate

placement.

4. Calculated "Segment offset down" value Down X [µm] from measurement at an angle of 0°.

This value is calculated from the actual "Segment offset down" value dx Down [µm] for this

segment. This offset is illustrated in the value dx Down [µm] (9).

The segment offset values Down X [µm] determined must always be in a certain tolerance

range (in our example -330..330µm). This value defines a permissible segment offset within

the construction and production tolerances, which can still be compensated by the software. If

the segment offset values are outside the tolerances, we can assume that the segment has

been mechanically deformed, so that it has been bent and is no longer suitable for accurate

placement.

The Down X [µm] value for segment 1 is used as a reference value for all other segments

and is therefore always set to 0.

SIPLACE Head Verification

User Manual Edition 01/2015

As the "Segment offset down" for segment 1 is the reference value for all other segment

offsets, the actual segment offset value dx Down [µm] is set to 0 for "Down X [µm] = 0"!

The following formula is used for the relationship of all other segments:

Down X [µm] Seg (n) = dx Down [µm] Seg (n) - dx Down [µm] Seg 1

5. Calculated "Segment offset down" value Down Y [µm] from measurement at an angle of 0°.

This value is calculated from the actual "Segment offset down" value dy Down [µm] for this

segment. This offset is illustrated in the value dy Down [µm] (10).

The segment offset values Down Y [µm] determined must always be in a certain tolerance

range (in our example -330..330µm). This value defines a permissible segment offset within

the construction and production tolerances, which can still be compensated by the software. If

the segment offset values are outside the tolerances, we can assume that the segment has

been mechanically deformed, so that it has been bent and is no longer suitable for accurate

placement.

The Down Y [µm] value for segment 1 is used as a reference value for all other segments

and is therefore always set to 0.

As the "Segment offset down" for segment 1 is the reference value for all other segment

offsets, the actual segment offset value dx Down [µm] is set to 0 for "Down X [µm] = 0"!

The following formula is used for the relationship of all other segments:

Down Y [µm] Seg (n) = dy Down [µm] Seg (n) - dy Down [µm] Seg 1

6. Results display (OK  green tick / NOK  red X)

7. Actual segment offset dx Up [µm] of relevant segment to component camera center during

measurement of calibration component.

8. Actual segment offset dy Up [µm] of relevant segment to component camera center during

measurement of calibration component.

9. Actual segment offset dx Down [µm] of relevant segment to component camera center during

measurement of calibration component.

10. Actual segment offset dy Down [µm] of relevant segment to component camera center during

measurement of calibration component.

11. Diagram for illustration of segment offset values "up" with the following values:

a. Axis of abscissas (X axis)  Segment offset up X [µm]

b. Axis of ordinate (Y axis)  Segment offset up Y [µm]

c. Red border  Min and max tolerances (in our case -290..290µm)

d. Use the button to zoom in on the diagram.

12. Diagram for illustration of segment offset values "down" with the following values:

Axis of abscissas (X axis)  Segment offset down X [µm]

Axis of ordinate (Y axis)  Segment offset down Y [µm]

Red border  Min and max tolerances (in our case -330..330µm)

Use the button to zoom in on the diagram.

13. The following values are displayed in this screen:

e. Dispersion Up X  This value is determined by finding the difference between

the lowest value for "Up X" [µm] (2) and the highest values for "Up X" [µm] (2). This

difference must be within a plausible tolerance (in this case 0..220µm).

f. Dispersion Up Y  This value is determined by finding the difference between

the lowest value for "Up Y" [µm] (3) and the highest values for "Up Y" [µm] (3). This

difference must be within a plausible tolerance (in this case 0..220µm).

g. Dispersion Down X  This value is determined by finding the difference

between the lowest value for "Down X" [µm] (4) and the highest values for "Down X"

[µm] (4). This difference must be within a plausible tolerance (in this case 0..220µm).

h. Dispersion Down Y  This value is determined by finding the difference

between the lowest value for "Down Y" [µm] (5) and the highest values for "Down Y"

[µm] (5). This difference must be within a plausible tolerance (in this case 0..220µm).

i. Results display (OK  green tick / NOK  red X)