| 摘要 |
A control system for a fluxer, the control system comprising: a variable speed pump configured to provide pressurised flow of liquid flux from a flux supply tank; a pulse- width-modulated (PWM) valve coupled to the variable speed pump; a jet nozzle coupled to the PWM valve and configured to eject a jet of flux drops onto a substrate to form flux points, lines or areas thereon; and a controller coupled to the variable speed pump and the PWM valve; wherein the controller is configured to generate PWM signals to control the PWM valve, and pump speed signals to control the variable speed pump, to thereby selectively and individually control volume of individual flux drops, and pressure and flow of the liquid flux, to form the flux points, lines or areas on the substrate. |
