YSD_Users_E.pdf - 第160页

4-32 4 Making the dispensing stable n Constant type T he constant type uses the following calculation formulas to calculate and correct the area. The disp ensing liquid amount is then corrected based on this calculated r…

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4-31
4
Making the dispensing stable
n
Proportion type
The proportion type uses the following calculation formulas to calculate and correct the area. The dispensing liquid
amount is then corrected based on this calculated results.
(Correction ratio) = (Area obtained by recognition) / (Standard area calculated from liquid amount used)
(Correction area) = (Standard area of table) × (Correction ratio)
Example of proportion type correction
For example, if a liquid amount of 20 is dispensed to check the dot area and the measured dot area is 0.60, then the
correction value is calculated as follows:
(Correction ratio) = (Area recognized) / (Standard area calculated from liquid amount timer used)
= 0.60 / 1.00
= 0.60
The correction ratio obtained is applied to all sections. The graph below shows the relation between the liquid amount
and the correction area.
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 10 20 30 40 50
Proportion type correction graph
Example
Dispensing liquid amount [msec]
Dispensed area [mm2]
Standard area
0.6 times
0.6
times
Correction area
63413-N7-00
Dispense correction is automatically performed based on the standard area and correction area.
1. Find the standard area using the same dispensing liquid amount of 20 [msec] as used for checking the dispensed area.
(=1)
2. Find the point where the graph of the area found in step 1 intersects with the graph of the correction area.
3. The liquid amount at the point found in step 2 is the correction value.
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 10 20 30 40 50
26.7
Correction value
Proportion type correction graph 2
Example
Dispensing liquid amount [msec]
Dispensed area [mm2]
Standard area
Correction area
1
2
3
63414-N7-00
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Making the dispensing stable
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Constant type
The constant type uses the following calculation formulas to calculate and correct the area. The dispensing liquid amount
is then corrected based on this calculated results.
(Additional value) = (Area obtained by recognition) - (Standard area calculated from liquid amount used)
(Correction area) = (Standard area of table) × (Additional value)
Example of constant type correction
For example, if a liquid amount of 20 is dispensed to check the dot area and the measured dot area is 0.60, then the
correction value is calculated as follows:
(Additional value) = (Area recognized) - (Standard area calculated from liquid amount timer used)
= 0.60 – 1.00
= −0.40
The correction ratio obtained is applied to all sections. The graph below shows the relation between the liquid amount
and the correction area.
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 10 20 30 40 50
Constant type correction graph
Example
Dispensing liquid amount [msec]
Dispensed area [mm2]
Standard area
−0.4
−0.4
Correction area
63415-N7-00
Dispense correction is automatically performed based on the standard area and correction area.
1. Find the standard area using the same dispensing liquid amount of 20 [msec] as used for checking the dispensed area.
(=1)
2. Find the point where the graph of the area found in step 1 intersects with the graph of the correction area.
3. The liquid amount at the point found in step 2 is the correction value.
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 10 20 30 40 50
Constant type correction graph 2
Example
Dispensing liquid amount [msec]
Dispensed area [mm2]
Standard area
Correction area
24
Correction value
1
2
3
63416-N7-00
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Making the dispensing stable
3.1.8 Checking that each setting is consistent
Check that each setting at the numbers below is consistent to ensure correction will be performed accurately.
The description here is given using a Type 111 nozzle as an example. If a setting was freely made, then adjust
it to match the other settings.
Check for each setting
Example for Type 111 nozzle
[Setup] - [Nozzle] screen
[Machine] - “Dispense Correction” screen
[Board] – [Pre Dispense] screen
[Mark] screen
1
1
4
4
3
3
2
2
64447-N7-00
n
Example of settings for Type 111 nozzle
Setting Description
1 Type -111: Type 11 Checks if correction type matches the target nozzle.
2 11 Checks if the mark No. to be used is correct.
3 Area/Per. : 0.19
Checks if “Check Shape” is set to “Area/Peri.” and the value for the standard
area is correct.
4 20 Checks if the liquid amount and timer values match.