FLOW METERING FOR DISPENSE MONITORING AND CONTROL

摘要

Methods and systems of accurately dispensing a viscous fluid onto a substrate. In an embodiment, a method includes using an electronic flow meter device to produce electrical flow meter output signals and performing a responsive control function in a closed loop manner by adjusting at least one dispensing parameter to correct for a difference between an output data set and a reference data set. In another embodiment, a system includes a control operatively coupled to a gas flow meter device and to a weigh scale allowing for a density of an amount of viscous material to be determined. In another embodiment, a method includes using a control coupled to both a gas flow meter device and a weigh scale and performing a responsive control function in a closed loop manner by adjusting at least one dispensing parameter using gas flow meter output signals and weigh scale output signals.

主权项

1. A method of controlling a non-contact jetting dispensing system to accurately dispense a viscous fluid onto a substrate, the method comprising:
directing the viscous fluid from a viscous fluid supply into a non-contact jetting dispenser having an inlet and an outlet; discharging the viscous fluid through the outlet of the non-contact jetting dispenser, the non-contact jetting dispenser being operable to start and stop the flow of the viscous fluid through the outlet onto the substrate; using an electronic flow meter device operatively coupled in a flow path between the viscous fluid supply and the outlet of the non-contact jetting dispenser to produce electrical flow meter output signals proportional to the flow rate of the viscous fluid flowing through the flow path, the electrical flow meter output signals forming an output data set; comparing the output data set to a reference data set stored in a control; and performing a responsive control function in a closed loop manner by adjusting at least one dispensing parameter to correct for a difference between the output data set and the reference data set.