D-serie level 1 EN.pdf - 第77页

Reference Run Z-Axis Reference Run P&P Reference Run S tude nt Guide Advanced Level 1 SIPLACE D-Series EN 05/2007 Reference Run 5-9 5.2 P&P Reference Run 5.2.1 Z-Axis Reference Run 5.2.2 D-Axis Reference Run 5-8:…

Reference Run

Reference Run (D-Series) Repeating Measurement of Values During Placement

Student Guide Advanced Level 1 SIPLACE D-Series

Reference Run EN 05/2007

5-8

5.1.5.2 Nozzle Length Measurement in the Component Sensor

If the component sensor option is installed and configured on the C&P12 placement head, the MC will

issue a CAN bus command for nozzle length measurement to be performed in the component sensor,

provided the nozzle to be set up is long enough (for nozzles longer than 12 mm, appropriately longer

than a 915 nozzle).

X The shadow cast by the component sensor IR laser beam is measured during star rotation.

X The programming system prescribes the nominal parameters for dynamics, length and vacuum

checks, for the nozzle type concerned.

X The measurement is saved as the reference length for the empty nozzle.

Empty nozzles are then compared to this reference value, before the component to be checked is

taken up. A "nozzle length error in component sensor" is issued if the value deviates by +0.15/

-0.1 mm.

The whole reference run is now finished. If no error messages have been issued, the station is now ready

for placement operations. The message "Waiting for PCB in input conveyor" will be shown.

5.1.6 Repeating Measurement of Values During Placement

The following reference value measurements are achieved by remeasuring the reference values after

350 components have been placed per segment, at the end of PCB placement.

X Vacuum "open" and "closed" measurements

X Nozzle scanning

X Reference nozzle length in component sensor option for C&P12 head

5-7: Nozzle length reference values for component recognition in the

component sensor option

Legend

1. IR receiver on C&P12 head back part

2. Nozzle

3. IR transmitter on C&P12 head front part

Reference Run

Z-Axis Reference Run P&P Reference Run

Student Guide Advanced Level 1 SIPLACE D-Series

EN 05/2007 Reference Run

5-9

5.2 P&P Reference Run

5.2.1 Z-Axis Reference Run

5.2.2 D-Axis Reference Run

5-8: Z-axis reference run

Legend

1. Incremental scale mounted on moveable part

of the Z-Axis

2. Fixed incremental encoder

3. Zero pulse on the incremental scale (only one

for Z-axis)

 Z-axis search for the commutation point of the

linear motors in a special mode. (A 3 phase

motor continues to run at the correct time and

in the correct sequence, when the current is

switched from 1 phase to the next one.)

 Then the Z-axis moves upwards to the zero

pulse and loads the zero point correction.

 The zero point correction, max. and min. travel

range, are determined when you calibrate the

head height.

5-9: D-axis reference run

Legend

1. Incremental glass scale for D-axis

2. Incremental encoder

3. Zero pulse on incremental glass scale

The D-axis (turning axis) then performs a

reference run.

The D-axis moves to the zero pulse of the D-axis

incremental encoder. The zero point correction is

loaded. The D-axis moves to the reference

position, in accordance with the polarity.

Reference run finished! The gantry reference

run (see Section Gantry) follows.

Reference Run

P&P Reference Run Vacuum Check

Student Guide Advanced Level 1 SIPLACE D-Series

Reference Run EN 05/2007

5-10

5.2.3 Vacuum Check

 After the CAN bus processor for the vacuum/air blast generator has booted, this is initialized. This

means that the vacuum/air blast generator is regulated to ensure that neither vacuum or air blast is

generated at the nozzle.

 The gantry axes move the Twin head to the reject position.

 When the head is over the reject container, the vacuum/air blast generator switches over to air blast,

to reject components and check the air blast.

 The vacuum/air blast generator now switches to vacuum and the open vacuum is measured* for both

segments (X and D3 machines, D1: one Twin segment).

 After measurement, the pressure is regulated to 0 bar.

 The vacuum reference run for the Twin head is now finished.

* The closed vacuum value for the Twin segments relates to the calibration value, which is determined

in SITEST.

5.2.4 Height Reference Run

5-10: Measuring the nozzle height

This function checks whether the correct,

programmed nozzle type is used. The nozzle

length is taken to calculate the pick up, centering

and placement height for the following

placements.

Legend

1. Top of fixed conveyor side

2. Z-motor

3. Vacuum - air blast distribution

X The gantry moves the placement heads above

the fixed conveyor side.

X The Z-axis positions module 2 (X/D3 machine)

downwards.

X The travel range of the Z-axis is taken to

calculate the TWIN Head height in relation to

the nozzle type.

X The same procedure is now performed for

module 1.

X The maximum length tolerance is 0.4 mm: If

the length difference is too high an error

message is displayed.

NOTE:

Both modules are measured at the same position of the PCB conveyor!

This TWIN Head reference run is performed parallel to the C&P head reference run in the other

placement area.