Systems and methods for processing a set of circuit boards

A circuit board processing system, comprising:

• a wash tank configured to contain cleaning fluid;
• a positioning subsystem configured to immerse a set of circuit boards into the wash tank when the wash tank contains the cleaning fluid and configured to dispose the set of circuit boards in the wash tank such that the circuit board component mounting surfaces of the circuit boards are substantially parallel to a flow of cleaning fluid produced by a flow control subsystem, the set of circuit boards including at least two circuit boards, the circuit boards being substantially parallel to each other when immersed into the wash tank;
• and
• the flow control subsystem having (i) a first set of nozzles disposed within the wash tank, (ii) a second set of nozzles disposed within the wash tank, and (iii) a controller which is configured to:
• while the set of circuit boards is immersed in the wash tank containing the cleaning fluid, direct the cleaning fluid through the first set of nozzles to provide a flow of the cleaning fluid in a first direction relative to the set of circuit boards, and after providing the flow of the cleaning fluid in the first direction and while the set of circuit boards is immersed in the wash tank containing the cleaning fluid, direct the cleaning fluid through a second set of nozzles to provide a flow of the cleaning fluid in a second direction relative to the set of circuit boards;
• wherein:
• the first set of nozzles disposed within the wash tank comprises a first set of nozzles disposed within the wash tank on a first side of the wash tank,
• the second set of nozzles disposed within the wash tank comprises a second set of nozzles disposed within the wash tank, on a second side of the wash tank, the second side of the wash tank opposing the first side of the wash tank,
• when directing the cleaning fluid through the first set of nozzles, the controller is configured to, while the set of circuit boards is immersed in the wash tank containing the cleaning fluid, direct the cleaning fluid through the first set of nozzles to provide the flow of the cleaning fluid in the first direction relative to the set of circuit boards, the first direction of the flow from the first set of nozzles being substantially parallel to the circuit board component mounting surface of the circuit board and being directed from the first side of the wash tank to the second side of the wash tank, and
• when directing the cleaning fluid through the second set of nozzles, the controller is configured to, after providing the flow of the cleaning fluid in the first direction and while the set of circuit boards is immersed in the wash tank containing the cleaning fluid, direct the cleaning fluid through the second set of nozzles to provide the flow of the cleaning fluid in a second direction relative to the set of circuit boards, the second direction of the flow from the second set of nozzles substantially parallel to the circuit board component mounting surface of the circuit board and being directed from the second side of the wash tank to the first side of the wash tank, the second direction of the flow substantially opposing the first direction of the flow along a common axis.