Is it possible to setup an extruder to home, the way the XYZ axes do ?

Hello, I am working with a syringe extruder. When I run out of material in the syringe I would like to be able to have a "home" position to pull the syringe plunger back to, for reloading. I already have an endstop that pauses the printer when the plunger reaches the end of the syringe. I'd like to have an endstop at the opposite end for unloading.

Is it possible to home an extruder as one would an X, Y, or Z axis? 
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