User Manual

5-4 Operation
5.8 Detailed Operation (SL-940E)
During operational setup of the SL-940E 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.
5.8.1 Coating Process
A typical SL-940E (conveyorized) conformal coating process is described below. See Figure 5-2 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 coating 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 coating 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. Conformal coating is applied.
The conformal coating fluid is applied to the board, according to a preprogrammed coating pattern.
Refer to the Easy Coat for Windows User Guide for detailed information.
4. The part moves to a downstream system.
When coating 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.