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Studen t Guide HS-50 A dvanced I 06/200 2 Edition 3 Machi ne Refere nce Run 9 3.9 X- and Y - Commut a tion p osition se arch Fig. 3.9 - 1 X- an d Y - Com mut atio n posi tio n searc h 3.10 Initia lization (r eference run…

06/2002 Edition Student Guide HS-50 Advanced I

3 Machine Reference Run

3.7 Completion of the Z axis reference run

Fig. 3.7 - 1 Completion of the Z axis reference run

3.8 Initialization (reference run) of the DP-axis

Fig. 3.8 - 1 Initialization (reference run) of the DP-axis

The Z - Axis moves to uppermost end stop.

Star axis turns to 2500 digit. The segment ball bearing is

now exactly between Z-claw and circular guidance.

Z-axis moves to the upper end stop and takes the position.

The same is done at the lower end stop, see figure 1.

The average value of these results is calculated and with a

minus sign loaded as the new reference value ( ZPC ) to

the axis controller.

After the star axis is moved back to reference position the

Z- axis starts another reference run with this new value.

The sleeve in the DP station is turned to

reference position.

Sequence: the DP-Station swivels in. The axis

starts and searches for the zero pulse.

The Zero pulse is checked on failure. The DP

station swivels out after the end signal.

The swiveling function is controlled by the

CAN-BUS.

Turning the sleeve is controlled by the axis

controller.

The zero point correction on the DP-axis is

always 0 ( because up to 12 segments are

operated by 1 drive ).

Student Guide HS-50 Advanced I 06/2002 Edition

3 Machine Reference Run

3.9 X- and Y- Commutation position search

Fig. 3.9 - 1 X- and Y- Commutation position search

3.10 Initialization (reference run) of X- and Y- axis

Fig. 3.10 - 1 Initialization (reference run) of X- and Y- axis

A commutation position search for the 3 phases AC-drives on the

antr

starts ri

ht after the

head axis reference run is succesfully finished.

(

A 3 phase motor move on and on when the current is switched from 1 phase to the next one, at

the correct time and in the correct sequence).

First one of the phases is connect to the power supply. With the incremental encoder the

movement is measured.

Than the current is switched to the next phase and this movement is measured too. The

machine repeat this to control the measurement values.

This axis mode of commutation position search for the digital axis controller seams like a

”uncontrolled” shaking.

After the commutation is detected both axes start parallel their reference run.

Due to the linear incremental encoder system the sequence is a little different to the Star

head.

The reference run is done with a defined limit switch and the incremental encoder.

First the gantry axes move to the reference proximity switch.

If the switching position is detected the direction of movement is reversed and the Zero pulse

signal search starts.

When the zero pulse is detected the zero point correction is loaded to the axis controller.

Reference run is completed.

The reference run for all axis is now finished. The vacuum reference run starts now.

06/2002 Edition Student Guide HS-50 Advanced I

3 Machine Reference Run

3.11 Vacuum check and all nozzle turned to 0°

Fig. 3.11 - 1 Vacuum check and all nozzle turned to 0°

3.12 Hight reference run

Fig. 3.12 - 1 Hight reference run

First of all the revolver head is moved to the

reject position by the gantry axes.

Whilst the star axis is indexing during the first

head cycle the DP station is swiveled in and

turns each segment to 0° position, figure 1.

Parallel to turning all nozzle the vacuum check is

operated.

The air kiss valve is opened and at the same time

the valve drive for the reject position is activated

and switches between open and closed. Anything

on the nozzle is rejected.

During the second head cycle the vacuum values

at the Pick up / Placement station are measured.

These are the reference values for each segment

for the vacuum checks during placement.

Finall

the

antr

moves the placement heads above

the fixed transport rail.

The Z-axis runs down, and all segments touch the

transport rail.

The correct fitting on the sleeve and the nozzle type

is tested.

nozzle 1 defines the reference length.

All segments are measured according to there

specific length.

Exception: special nozzle with type number X9X

The maximum length tolerance is 0,4 mm:

If the length difference is too high an error message

is displayed.

The nozzle length is taken to calculate the placement

height for the following placements.

The gantries of one placement area work only for

this measurement sequentially.