HS50_advance_level 1_20200522_221201 (1) - 第76页
06/2002 E dition Studen t Guide H S-50 Advance d I 3 Machi ne Refe rence Run 8 3.7 Completion of the Z a xis reference run F ig. 3. 7 - 1 Co mpl eti on o f th e Z ax is ref erenc e run 3.8 Initialization (reference r u n…
Student Guide HS-50 Advanced I 06/2002 Edition
3 Machine Reference Run
7
3.5 Preparing Z-axis reference run
Fig. 3.5 - 1 Preparing Z-axis reference run
3.6 Initialization (reference run) of the star axis
Fig. 3.6 - 1 Initialization (reference run) of the star axis
Ø
The Z - Axis runs to uppermost end stop.
When stand still is detected the Z- Axis runs
to the 27 Digit position with reduced force.
Ø
This Z-axis position with reduced force
enables the placement star to move into
reference position.
Ø
The reference run is completed after the
Star axis reference.
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Ø
Commutation position search for Star axis
motor (description see X- / Y-axis)
Ø
The Star axis turns counter clockwise to
zero point pulse of the incremental shaft
encoder. The zero point correction is
loaded. The Star axis turns clockwise until
the position counter shows 0 digit.
Ø
Segment number 1 is now in pick up- /
placement position.
Possible turning directions
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06/2002 Edition Student Guide HS-50 Advanced I
3 Machine Reference Run
8
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
Ø
The Z - Axis moves to uppermost end stop.
Ø
Star axis turns to 2500 digit. The segment ball bearing is
now exactly between Z-claw and circular guidance.
Ø
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.
Ø
After the star axis is moved back to reference position the
Z- axis starts another reference run with this new value.
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Ø
The sleeve in the DP station is turned to
reference position.
Ø
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.
Ø
The swiveling function is controlled by the
CAN-BUS.
Ø
Turning the sleeve is controlled by the axis
controller.
Ø
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
9
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
Ø
A commutation position search for the 3 phases AC-drives on the
g
antr
y
starts ri
g
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).
Ø
First one of the phases is connect to the power supply. With the incremental encoder the
movement is measured.
Ø
Than the current is switched to the next phase and this movement is measured too. The
machine repeat this to control the measurement values.
Ø
This axis mode of commutation position search for the digital axis controller seams like a
”uncontrolled” shaking.
Ø
After the commutation is detected both axes start parallel their reference run.
Ø
Due to the linear incremental encoder system the sequence is a little different to the Star
head.
Ø
The reference run is done with a defined limit switch and the incremental encoder.
Ø
First the gantry axes move to the reference proximity switch.
Ø
If the switching position is detected the direction of movement is reversed and the Zero pulse
signal search starts.
Ø
When the zero pulse is detected the zero point correction is loaded to the axis controller.
Reference run is completed.
Ø
The reference run for all axis is now finished. The vacuum reference run starts now.