Selective Solder

Category: Plated Through Hole

Description: Selective Solder is a process for handling PTH components or connectors that cannot be wave soldered: for example, PTH components that are surrounded by SMT components that have already completed reflow. Selective solder addresses only the leads that have been programmed, and is much faster than hand soldering.

Major Cost Drivers -- PCBA Selective Solder

Selective Solder Cycle Time is the time to load and unload divided by the number of panels, plus the time to move through the selective solder machine.

Process Time = ((Load Time + Unload Time)/Panelization Quantity) + Selective Solder Time

Load Time = Mask Time + Flux Time + Fixture Load Time

// Mask Time, Flux Time, Fixture Load Time are only calculated.

Mask Time = (Machine variable)

Flux Time = (Machine variable)

Fixture Load Time = (Machine variable)

// Unload from machine and fixture, cooling optional.

Unload Time = Selective Solder Unload Time + Fixture Unload Time

Selective Solder Unload Time = (Machine variable)

// Fixture Unload Time is only calculated if PSO Fixture Requirements = true

Fixture Unload Time = (Machine variable)

Selective Solder Time = (Selective Solder Length/Selective Solder Speed) + (Quantity of PTH Leads/Nozzle Speed)

Selective Solder Length = (Machine variable)

Selective Solder Speed = (Machine variable)

Nozzle Speed = (Machine variable)

User Inputs –- PCBA Selective Solder

PSO: Masking Requirements (Y/N)

PSO: Flux Requirements (Y/N)

PSO: Fixture Requirements (Y/N)