Here is the system design diagram for the current Airtripper Extruder Filament Force Sensor set-up. The diagram shows direct force sensing where all the forces generated by the stepper motor is transferred to the load cell.

An amended system design diagram is coming up that shows indirect force sensing. This diagram will show how the force sensor can be applied to existing extruder systems. Should be a lot easier to set up than the current extruder force sensor design.

The direct force sensing set up is ideal for testing and benchmarking existing and new hot end designs, stepper motors and drive gear filament pulleys.