M20_Ope_E - 第495页
Chapter 16 Dispenser 16-25 16-4 Nozzle offset 16-4-1 Nozzle offset This nozzle offset function captures the image of the dispense point that has been dispensed on the dot station, processes this image, and corrects the i…
Chapter 16 Dispenser
16-24
Note: An [Auto] dispense check occurs during production when the Placement & mark (program) contains a
"dispense check" (dot station) step.
Therefore, the [Manual] method should be used at dispense check tests.
Contents of message display
[AR]・・・ Dispense area (square mm x 1000)
[LS]・・・ Maximum dispense diameter (μm)
[SS]・・・ Minimum dispense diameter (μm)
[SD]・・・ Dispense area ratio (%)
Note ①: The [AR], [LS], [SS], and [SD] lines on the message display show the image process result of one dispense
point. The image process result OK is displayed in blue while the result NG is displayed in orange.
The dispense area ratio, the image process result of which is determined as OK (displayed in blue), is
accumulated (averaged) to judge whether or not the calculation value is in a range of [Check
Tolerance](±%).
Note ②: If the dispense check is not determine as OK (not converged) even after the dispense correction (retry)
has been repeated, adjust the dispense amount.
Adjust the dispense conditions of the dispense data so that [LS] and [SS] on the message display get close
to [Target Diameter] of the Image Library (image data) and [SD] gets close to 100%.
(Make the adjustment so that many blue image process result OK lines are shown on the message
display.)
Note ③: If the dispense conditions for the dispense check have been changed, change also the data of the same
dispense conditions for dispensing onto the PCB accordingly.
These conditions are always considered as a set. Be sure to set the same dispense conditions.
Note ④: When there is a dispense check (dot station) step in the placement & mark (program), this dispense check
affects the subsequent dispense steps.
Subsequently, when there is the second dispense check (dot station) step, the previous dispense check is
deleted, the dispense check is updated to a new dispense check, and this dispense check affects the
subsequent dispense steps.
For example, you can program like, “Dispense check with small dispense amount ⇒ Dispense with small
dispense amount ⇒ Dispense check with large dispense amount ⇒Dispense with large dispense
amount”.
Chapter 16 Dispenser
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16-4 Nozzle offset
16-4-1 Nozzle offset
This nozzle offset function captures the image of the dispense point that has been dispensed on the dot
station, processes this image, and corrects the installation error between the dispense head and nozzle.
There are two kinds of nozzle offset acquisition methods, auto and manual.
16-4-1-1 Dispense data, Dispense Library - Dispense Check, and Image Library (image data) setting
The dispense check parameters used to dispense onto the dot station can be used as they are. It is not
necessary to create new parameters.
16-4-1-2 Auto acquisition
When the production starts, the nozzle moves down to push the roll paper on the dot station so as to
acquire the nozzle offset in the Z-direction.
Next, the dispense is performed onto the roll paper on the dot station to acquire the nozzle offset in the
XY-direction.
This nozzle offset is acquired at the same time when the dispense check is performed.
If the cover is opened and closed during production, the nozzle offset is acquired automatically when the
production is restarted.
Note: An [Auto] dispense check occurs during production when the Placement & mark (program) contains a
"dispense check" (dot station) step.
Nozzle offsets are also acquired when this dispense check occurs.
Therefore, no particular operation by the user is required.
16-4-1-3 Manual acquisition
Menu: Manual>Dispense
Action:
① Open the “Manual>Dispense” window.
Chapter 16 Dispenser
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② In this window, click the <Get Z Offset> button in the [Offset Acquisition] area.
the nozzle moves down to push the roll paper on the dot station so as to acquire the nozzle offset in
the Z-direction.
③ Next, select a dispense code and click the <Get XY Offsets> button.
The dispense is performed onto the roll paper on the dot station to acquire the nozzle offset in the
XY-direction.
④ The acquired nozzle offset values display at this screen's [Offset] item.
Note: Acquire the nozzle offset under dispense conditions with proper dispense area and dispense shape.
In particular, if the dispense shape is incorrect, such as fluid stringing or ellipse, the center of the dispense
point deviates, causing an error.
Note: An [Auto] dispense check occurs during production when the Placement & mark (program) contains a
"dispense check" (dot station) step.
Nozzle offsets are also acquired when this dispense check occurs.
Therefore, this manual acquisition operation should be used for nozzle offset tests.