Here is an example of how the wash station works. The pipettes tip move into the wash basin and are washed outside by fluid when the washing pump is turned on. The excess fluid is drawn into the waste basin and this goes to waste. While the tips are being washed on the outside there syringe pump is perfusing fluid out of the inside of the pipettes.

Here is a video demonstrating how a macro can be put together using the LabAutoBox software