88192277-01-19 - Micron Technical Reference V9 Volume 4.pdf - 第72页

38.30 Technical Reference Manual Chapter Issue 4, Nov 19 STINGER CALIBRATIONS Contact Height Contact height sets the laser to needle height in relation to the upper su rface of the product. A relative measurement is made…

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STINGER
CALIBRATIONS
Chapter Issue 4, Nov 19 Technical Reference Manual 38.29
beam to be accommodated simultaneously.
In the diagram, the unit is shown as two rectangles representing the laser (blue)
and the nozzle (grey). These representations are shown at three possible
locations: default (centre); upper and lower. At the centre, the unit can make a
good height check because both the laser, and the nozzle, are located where
the surface of the board is available for a reading and a deposit. However, when
the unit moves away from the height position to the range position, the board
edge is not straight, therefore the laser may not ‘see’ the upper surface of the
product. Similarly, a feature under the laser on the bottom location is centred
over a slot in the board where the laser beam passes through. The contact
height cannot be set. The user must choose a location similar to that of the top
track, where both the range and height checks can be carried out successfully.
Laser
L
L
C
C
Nozzle
Incorrect
Range
Location
Contact Height Positions
Range Locations
Product
Incorrect Height Location
Gap
38.30 Technical Reference Manual Chapter Issue 4, Nov 19
STINGER
CALIBRATIONS
Contact Height Contact height sets the laser to needle height in relation to the upper surface of
the product. A relative measurement is made for all other programmed loca-
tions.
1. Select Maintenance.
2. Select Options.
3. Select Stinger Hardware.
4. Select Fitted.
5. Select Back.
6. Select Back.
7. Select Back.
8. Open the printhead cover.
9. Remove the stencil.
10. Close the printhead cover.
11. Press the System button.
12. Select Unload Screen.
13. Select Setup Product.
14. Select Options.
15. Select Stinger Dispenser.
16. Select Load Board and load a product.
17. Select Manual Calibrate to open the stinger heights calibration page.
18. The camera axis moves the stinger unit to the centre of board location by
default. However, this position can be set to any location using the Calibra-
tion Point X/Calibration Point Y parameter pair. See information on Locat-
ing the Correct Point for Height Settings.
19. Select Stinger Jog Mode and initially set the mode to Coarse (1 step =
0.5mm).
STINGER
CALIBRATIONS
Chapter Issue 4, Nov 19 Technical Reference Manual 38.31
20. Open the printhead cover.
21. Select Step Up or Step Down to move the nozzle into position just above
the board.
22. Place the 0.05mm feeler gauge on the board directly below the nozzle tip.
23. Select Stinger Jog Mode and set the mode to Fine (1 step = 0.05mm).
24. Continue jogging down until the feeler gauge has a small amount of resist-
ance to being pulled from under the nozzle tip. Do not jog down beyond
this point; any deflection of the board results in poor output and must
be avoided. The feeler gauge and the nozzle should not deflect the product
down. Any movement of the product away from the nozzle tip causes a
discrepancy in the laser reading.
25. Select Save Contact.
26. Select Back.
27. The camera axis moves the unit to the right hand edge of the board. This is
the Range Position where the unit performs a Range Check.
28. The nozzle moves down to contact height (1mm above).This completes the
Range Check.
Stinger can track the rises and falls on the product surface within the range
check limits.The user must set the idle height next.
Board Clamps may cause boards to bow slightly in the centre.
This may cause the measurement to fall outside the 0.1mm minimum
Z Axis contact position.
The feeler gauge thickness is the equivalent of one step of the Z Axis
stepper motor. It is essential that when setting this contact point no
board deflection occurs.
Rising Table
Board
Board Clamps
Rails
Tooling
Nozzle Tip
0.05mm Feeler
Gauge