00194614-08 Trainingsdoku. SG X-Serie_X4i SW70x (AL2)_EN.pdf - 第291页

Collect, Pick and Place Head (CPP) Pickup and Placement Cycle for CP P Measuring Z Axis Position for Component Recognition by the Component Sensor 291 Student Guide SIPLACE X-Serie and X4I SW70x (AL2) Measuring Z Axis Po…

Collect, Pick and Place Head (CPP)

Determining the Vacuum and Threshold Values Reference Run CPP Head

Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 290

Determining the Vacuum and Threshold Values

8.3.5 Determining the Vacuum and Threshold Values

Measuring and calculating the vacuum values for a reference run

▪ The vacuum is measured twice at the reference point: first with open and then with closed nozzle

tips.

▪ The value with closed segment does no longer depend on the ambient pressure it is controlled by

the pressure control valve. The nozzle fit (nozzle pickup error) and the quality (contamination/

damage) of the nozzle tip influence the vacuum measurement values.

▪ The value by open pressure control valve depends on the nozzle size and condition. The smaller the

nozzle, the greater the open valve value will be. This nozzle-specific value is preset by the SIPLACE

Pro computer. A contaminated or blocked nozzle will also give a higher valve.

▪ The difference between the open and closed nozzles has been preset by the programming system

as an ideal case minimum value. This value is different for all nozzle types e.g. 120 mbar for 1004,

1014 nozzles. If these values are not achieved, the error message “Vacuum difference open-closed

is too low” will appear.

▪ The threshold for component acceptance is also set now. Assumed are following values for a 1004

nozzle: a value of 660 mbar when the nozzle is open and a value of 852 mbar when the nozzle is

closed. The calculation is performed as follows:

Vacuum distance = (852 (closed) - 660 (open))= 192 mbar

This is greater than the vacuum distance required in the parameter specifications for this nozzle type

(120 mbar). The open vacuum of 660 mbar is significantly greater than the required 250 mbar.

Collect, Pick and Place Head (CPP)

Pickup and Placement Cycle for CPP Measuring Z Axis Position for Component Recognition by the Component Sensor

291 Student Guide SIPLACE X-Serie and X4I SW70x (AL2)

Measuring Z Axis Position for Comp onent Rec ognition by the C omponent Sensor

8.3.6 Measuring Z Axis Position for Component Recognition by the Component Sensor

While the Z axis moves downwards, the nozzle interrupts the laser beam of the component sensor. The

axis position is saved and later used for the calculation of the component height and component

presence. At the upwards movement of the Z axis, the laser beam is no longer interrupted and the axis

position is saved again. The component presence can be determined during placement by the

programmed component height (SIPLACE Pro) and the nozzle length, calculated during the height

reference run by the Z axis position counter.

Pickup and P lacement Cycl e for CPP

8.4 Pickup and Placement Cycle for CPP

Working Position on Placement Head

8.4.1 Working Position on Placement Head

Nozzle length reference values for component

recognition with component sensor

Legend

1. Component sensor

2. Nozzle

3. IR receiver

4. IR transmitter

During the height reference run, the component sensor

measures the Z axis position for each segment, to detect

the presence/absence of components in the pickup and

placement position.

Working Position on Placement Head

Legend

1. Optical centering (component camera)

2. Vacuum measurement holding circuit

3. Vacuum measurement placement circuit

4. Pickup/placement station and reject position

5. Position of component sensor

6. Direction of processing in C&P mode

Collect, Pick and Place Head (CPP)

Placement Modes Pickup and Placement Cycle for CPP

Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 292

Placement Modes

8.4.2 Placement Modes

The CPP head functions according to the Collect&Place principle, like the C&P12 head, whereby the

additional operating modes Pick&Place and mixed mode help to extend the component spectrum.

The placement mode is, on the one hand, dependent on the configured camera and, on the other hand,

on the component dimensions and their tolerances in SIPLACE Pro.

The respective placement mode is determined by the Optimizer in SIPLACE Pro and can not be

influenced.

Overview of the placement modes

1. Collect & Place Mode

Component Range: 01005-27x27mm, 8,5mm height

Speed: 20.000 to 24.000 cph

Accuracy: +/- 55 µm @ 4 s; 0,3° @ 4s

The Collect-and-Place mode is the same mode for the C&P6/12 and C&P20A placement heads.

Components are picked up (the quantity depends on the number of segments), optically centered with

the component camera and then placed.

1. Mixed Mode

Component Range: 01005-32x32mm, 11,5 mm height

Mixed mode differentiates between the following two cases:

▪ The components are small enough to be rotated by the head.

▪ The components are too large. Just 2 or 3 components are picked up, centered by the stationary

camera and then placed.

1. Pick & Place Mode

Component Range: 01005-50x40mm, 11,5mm height

Speed: up to 1.500 cph

Accuracy: +/- 45 µm @ 4 s; 0,1° @ 4s

P&P mode: The Pick-and-Place mode is the mode used for IC and TwinHead. It is therefore also used

for the CPP head, which picks up components with either one or more segments, according to the

component size. Due to their size, it is not possible to rotate these components with the head and they

need to be optically centered via the stationary camera and then placed.