Instruction Manual

Operation 6-27
6.10 Conformal Coating Setup Procedures
This subsection describes the setup procedure for the C-740/C-741 Series Dispensing Systems. Before
operating the dispensing system, read all related component manuals and be familiar with the operating
characteristics of each of the system components. A thorough understanding of the system will help you
to obtain the desired results.
WARNING! Allow only qualified personnel to perform the following tasks. Observe and follow
the safety instructions in this document and all other related documentation.
Figure 6-11 illustrates the setup procedure for the C-740/C-741 dispensing system. Your detailed system
operation may vary slightly depending on your process assembly requirements and system configuration.
Initial setup includes the following procedures to configure the system according to your specific
production requirements:
•
Performing a Characterization
•
Developing a Coating Program
•
Performing a System Test
6.10.1 Performing a Characterization
Many factors must be taken into consideration when programming the dispensing system for board
coating. Such factors as material type, temperature, and thickness, as well as the type of surface to be
coated, must be well thought-out when developing a conformal coating program. Characterization refers
to selecting the appropriate response times to compensate for these variables.
Characterizations must be performed each time a new material is used or as required to ensure quality and
consistent dispensing. Refer to 7.5 Characterization for detailed instructions on performing a
characterization.
6.10.2 Developing a Coating Program
The coating program is developed with the ECXP software and the computer in conjunction with the
dispensing system. The following is a typical series of steps required to develop a coating program.
1. Define board coating requirements, such as areas to be coated, areas not to be coated (keep-
out areas), and areas in which coating is optional.
2. Develop coating move sequences based on the board coating requirements.
! Refer to the ECXP User Guide or Online Help for more information.
3. Test coat a board with material.
4. Update the program and recoat the board until it is acceptable.