SC_450 PreciseCoat Conformal Coating Jet_Rev_04.pdf - 第24页
SC-450 PreciseCoat C onformal C oating J et Operation 18 © 2024 Nordson Corporation 4.6.1 DL T ype Needle Hardware Response To determine hardware response: 1. Utilize Figure 4-1 to determ in e the noz zle diameter bas ed…
SC-450 PreciseCoat Conformal Coating Jet Operation
© 2024 Nordson Corporation 17
4.5.1 Fine Tuned Settings
For volumetric repeatability applications, the following parameters will help decrease repeatability.
Table 4-2 Volumetric Repeatability Factors
Parameter
Action
Shot Size Increase
Stroke
Decrease
Fluid
Pressure
Increase
On Time
Increase
For noise sensitive applications, the following parameters will help reduce audible noise levels.
Table 4-3 Audible Noise Factors
Parameter
Action
Drive
Needle
Q type Needles (
See
Item 20
)
Stroke Decrease
Drive Frequency 145Hz (3ms On/3.8 Off)
4.6 Hardware Selection
Hardware selection is based on multiple factors and the values are application dependent. These are
Asytmek starting points, contact Technical Support for additional information.
The SC-450 can be configured for two (2) different needle types, other needle types are not supported.
Utilize Table 4-4 to assist with the needle types.
Table 4-4 Needle Types
DL Type Needle Hubbed Nozzle
Precision Applications
Accessibility Applications
Higher Viscosity
Lower Viscosity
Small Dots and Lines
Larger Dots and Lines
1.5 - 3 mm Line Widths 2.5 - 3.5 mm Lines and Widths
6 mm
Component Clearance
12 mm
Component Clearance
SC-450 PreciseCoat Conformal Coating Jet Operation
18 © 2024 Nordson Corporation
4.6.1 DL Type Needle Hardware Response
To determine hardware response:
1. Utilize Figure 4-1 to determine the nozzle diameter based off the targeted line width.
Figure 4-1 Line Width
2. Utilize Figure 4-2 to estimate thickness of coating based on the selected nozzle diameter.
?
NOTE
Thickness increases with line width and is application dependent.
Figure 4-2 Thickness
SC-450 PreciseCoat Conformal Coating Jet Operation
© 2024 Nordson Corporation 19
4.6.1.2 DL Type Needle Coating Material Response
The coating material response is dependent on what needle is selected, see 4.6.1 DL Type Needle
Hardware Response.
To determine the coating material response:
1. Select the nozzle diameter from line width and the coating material (Figure 4-3).
2. Repeat nozzle type hardware response if the line width and coating material does not align
with application requirements, see 4.6.1 DL Type Needle Hardware Response.
Figure 4-3 Coating Material Response
3. Utilize Figure 4-4 to estimate thickness of coating based on the selected nozzle diameter.
?
NOTE
Solvent based materials do not have the same thickness to width relationship
compared to other coating materials (ie…100% solids).
Figure 4-4 Thickness