Instruction Manual

6-2 Operation
6.4 Detailed Operation (C-740)
During operational setup of the C-740 inline system, the part enters the system using SMEMA (Surface
Mount Equipment Manufacturers Association) handshakes. It moves to the dispensing area where the
conformal coating is applied and then exits the system. Conformal coating application programs are
created using the Easy Coat for Windows XP (ECXP) software installed on the system.
6.4.1 Dispensing Process
A typical C-740 (conveyorized) conformal coating process is described below. See Figure 6-1 for
additional details. Setup and programming procedures are not included in the description.
1. A part enters the system from an upstream system.
A SMEMA handshake with upstream machine signals dispensing system is ready for a workpiece.
The (standard) chain conveyor carries the board by the edges into the dispensing area. A stop pin
engages to stop the board.
2. The part stops in the Dispensing Area.
A photoelectric sensor detects the presence of the board. The conveyor indexes the part according to
SMEMA standards. Pneumatically actuated board pins lower into holes in the board to secure it
precisely in place for accurate fluid dispensing.
3. Fluid is dispensed.
The conformal coating fluid is applied to the board, according to a preprogrammed dispensing
pattern. Refer to the Easy Coat for Windows User Guide for detailed information.
4. The part moves to a downstream system.
When dispensing is complete, the stop pin disengages, a SMEMA handshake occurs, and the part
moves to the downstream system. Another part is loaded and carried into the dispensing area.