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1. (WO2017196669) SYSTEM OF DISPENSING MATERIAL ON A SUBSTRATE WITH A SOLENOID VALVE OF A PNEUMATICALLY-DRIVEN DISPENSING UNIT

Pub. No.:    WO/2017/196669    International Application No.:    PCT/US2017/031333
Publication Date: Fri Nov 17 00:59:59 CET 2017 International Filing Date: Sat May 06 01:59:59 CEST 2017
IPC: B05C 5/02
Applicants: ILLINOIS TOOL WORKS INC.
Inventors: REID, Scott, A.
PRENTICE, Thomas, C.
MATTERO, Patsy, A.
Title: SYSTEM OF DISPENSING MATERIAL ON A SUBSTRATE WITH A SOLENOID VALVE OF A PNEUMATICALLY-DRIVEN DISPENSING UNIT
Abstract:
A system for dispensing material on a substrate includes a dispensing unit having a dispensing piston. The dispensing piston is pneumatically driven from a first lower position to a second upper position. The system further includes a solenoid valve coupled to the dispensing unit, with the solenoid valve being configured to control air flow to and from the dispensing piston. The solenoid valve includes a solenoid coil and an amplifier connected to the solenoid coil. The system further includes a controller coupled to the amplifier, with the controller being configured to generate a command signal to the amplifier to control current in the solenoid coil.