00196044-05 - sg x und x4i fse_en.pdf - 第485页

Calibration Heads and Cameras General Explanation of Calibration St eps S tudent Guide (FSE) SIPL ACE X Series and X4I Edition 01/2009 EN Calibration 489 12.4.7.1 T win head height: Calibrate Head heig ht mean to de term…

Calibration

General Explanation of Calibration Steps Heads and Cameras

Student Guide (FSE) SIPLACE X Series and X4I

Calibration Edition 01/2009 EN

488

12.4.7 Heads and Cameras

When calibrating the heads and cameras, the component camera is measured first, followed by the

segment offsets at the top and bottom. The head offset and the top/bottom segment offsets are

measured in one calibration step.

Component Camera

 Determining the calibration factors, relation of camera pixel size to resolution of machine

measurement system (X, Y).

 The camera center is determined.

 The mounting angle of the CCD sensor in the component camera, compared to the turning level of

the placement star, is measured.

Head offset

The head offset is the distance between the PCB camera and the nozzle (segment 1). The target value

is a fixed value (X = 0 and Y = -105 mm), to which an offset value (from head calibration) is added.

Segment offset

The segment offsets top and bottom are determined in one calibration step for each segment.

For the segment offset top, the calibration tool is rotated in 0°, 90°, 180° and 270° steps inside the

component camera. The rotating center point of the nozzle tip, in relation to the component camera

center, is then determined in the X and Y directions. (see diagram)

12-4: Segment offset top

For the segment offset bottom the calibration tool is placed into the calibration tool pocket in 0°, 90°,

180° and 270° positions and is measured with the PCB camera. The rotating center point of the nozzle

tip - when the Z axis is extended - is then determined in relation to the PCB camera. In this case,

segment1 is taken as reference with a value of 0.

12-5: Segment offset bottom

Calibration

Heads and Cameras General Explanation of Calibration Steps

Student Guide (FSE) SIPLACE X Series and X4I

Edition 01/2009 EN Calibration

489

12.4.7.1 Twin head height:

Calibrate Head height mean to determine Z Zero point correction.

Procedure:

 move to zero pulseset the position counter to 0

 move with 517 nozzle to the conveyor side

 subtract ‘Kopfhöhe’ head height from Ideal.ma (65500)

 subtract theoretical nozzle length

 is zero point correction Z pos.act. -nozzle length -head height = 0-corr.

12-6: Twin head height

Legend

1. Z axis incremental encoder

2. Incremental encoder fixed

3. Top edge of the conveyor side

4. Head height

5. Nozzle length

Calibration

General Explanation of Calibration Steps Heads and Cameras

Student Guide (FSE) SIPLACE X Series and X4I

Calibration Edition 01/2009 EN

490

12.4.7.2 IC camera:

 After measuring the head height of Twin head (Z axis zero point correction) the Twin -IC camera is

calibrated.

 The first measurement is the focus level for the stationary camera. That means, the Twin head move

with the Z axis of the cover from the stationary camera. (This height is the centering height for bottom

side of components.)

 The Pixel size in µm of the camera is determined next. Saved as:

/XU_Pixel / YU_Pixel/ of camera 11(in 79000 nm).

 The camera center of the Twin- IC-camera refer to the zero point of the machine (X / Y counter zero

position).

These coordinates are entered in the cameras.xml file, in the camera data block of the relevant gantry:

Proximity values in nm

Resolution yuPixel=41750

xuPixel=41750

The calibration data for the IC camera are saved in the cameras.xml file.

 Calibration IC camera position fiducial

12.4.7.3 FC camera: (Option)

 After measuring the height of the Twin head, the FC camera is calibrated.

 The first measurement is the focus level for the stationary camera. That means, the Twin head move

with the Z axis of the cover from the stationary camera. (This height is the centering height for bottom

side of components.)

 The Pixel size in µm of the camera is determined next.

The following proximity value in nm is saved in the

cameras.xml

file, in the Camera data block for

the relevant gantry:

– yUPixel=16250

– xUPixel=16250

 The camera center of the Twin- FC-camera refer to the zero point of the machine (X / Y counter zero

position).

 Saved are all this data and coordinates in: KAM_DAT.MA in Data bloc camera 15: (Gantry 2)

camera_position_X / camera_position_Y/ camera_offset_Z/

 Calibrate the IC camera position fiducial

12.4.7.4 Twin head segment offset bottom at segment 1 and 2:

 That means the D axis, center of sleeve of the Twin (IC) -placement head refer to the camera center

of PCB-camera.

The coordinates saved in PIP_OFF.MA at Data bloc

/Nozzle offsets down head 2/

Nozzle offsets down segment 1(2) Offset_X /Offset_Y /