00196044-05 - sg x und x4i fse_en - 第484页
Calibration General Explanation of Calibratio n Steps Heads and Cameras S tudent Guide (FSE) SI PL ACE X Series and X4I Calibration Edition 01/2009 EN 488 12.4.7 Heads and Cameras When calibrating th e heads and cameras,…
Calibration
Tables General Explanation of Calibration Steps
Student Guide (FSE) SIPLACE X Series and X4I
Edition 01/2009 EN Calibration
487
12.4.4 Tables
During machine calibration, each gantry moves to the fiducials for the corresponding table. Gantry 1
approaches the fiducials for table 1 at location 1 and so on.
So-called dummy feeders with an additional table fiducial are fitted at gantries 2 and 4, as the rotated
gantries limit the travel range at these locations.
The fiducials are used to calculate the X, Y and angle positions of the table in the machine.
Information about the position of the fiducials can be found in the section Calibration Position.
12.4.5 PCB Reference Corner
The PCB reference corner is determined via a fiducial which is integrated into each conveyor side. An
offset for the real PCB reference corner is stored in the software. The calibration data plus the offset
gives the PCB reference corner.
This position tells the software where the board is in the machine and forms a reference point to the
board coordinate system.
Information about the position of the fiducials can be found in the section Calibration Position.
12.4.6 Nozzle Changer and Nozzle Station
Each nozzle magazine and nozzle station has two fiducials.
When calibrating the NC and the nozzle station, the system first approaches the two fiducials for the
nozzle station and measures the height of the nozzle station with the help of the Z axis and a nozzle of
your choice.
After this, each magazine is approached and its two fiducials and Z-height are ensured. This is
performed in one calibration step for each magazine.
You do not need a special nozzle for calibrating the Z-height and the component level in the magazine
is of no relevance. The Z-height can be measured with a nozzle of your choice, on the top edge of the
magazine.
The Z-height is then calculated from the nozzle length, Z-position at top edge of magazine and a fixed
value for the nozzle garage.
Information about the position of the fiducials can be found in the section Calibration Position.
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