00900068-02_SM_ASM_ProcessLens_EN - 第33页

ASM Proces sLens Single - l ane 03/2020 Edit ion 33 3.10 Check the alignment of the encoder re ader of the Y gantr y W henever the enc oder rea ders ha ve been r emoved , the rea ders ne ed to be r ealigned . Requirem en…

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Figure 3-28: Position of spacer
Key:
1) Encoder reader
2) Y scale bar
3) Position of spacer
6. The gap between the reader and the scale bar must be 2.1 mm.
7. Calibrate the new reader. See the external Power Point file “Y1Y2 ENC install & adjust
procedure”.
8. Move the gantry slowly the whole travel range backwards. Whilst doing that check the light at
the indicator.
9. If the lights are not within the color range the holder needs adjustments. See 3.9 Color code for
the encoder readers.
10. Proceed the same way with all other encoder readers.
Installation
Follow the removal instructions in reverse order for installation.
3.9 Color code for the encoder readers
Color Indication Adjustment requirement
Purple Optimum set-up No
Blue Good set-up No
Green Good set-up No
Orange Acceptable set-up but below
recommendation level.
Yes, angle and gap.
Red Poor set-up, signal maybe too
low for reliable operation
Yes, angle and gap.
Table 3-2: Color code for the encoder readers
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3.10 Check the alignment of the encoder reader of the Y gantry
Whenever the encoder readers have been removed, the readers need to be realigned.
Requirements:
● Machine is switched on.
● Optical head is centered on the X position.
Figure 3-29: Position of the flexures and the optical head
Key:
1) Optical head
2) Flexures
Key:
1) Flexures
Figure 3-30: Flexures
1. Install the flexures (1) at the gantry.
Flexures
Without the flexures the gantry can be moved in slightly different positions. The flexures
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Figure 3-31: Gantry Index ParallelTool
2. Start the Process "Gantry Index ParallelTool"
3. Press the Init button to initialize the gantry.
4. Press the "Start Gantry encoder TEST" button.
5. Slowly push the gantry backwards.
NOTICE
Test results
This needs to be done within 5 seconds after the button has been pushed. Otherwise the
6. Press the "Stop the Gantry Encoder" button.
7. Repeat this at least 10 x times.
8. The specified range is +/- 1000.
9. If any of the 10 X results differ from the specified range go back to adjust the brackets and
repeat the check.
Installed flexures
Installed flexures cause damage to the machine when in operation mode,