Add additional axes to Marlin which need to be homed (2 replies)

Hi all,

I created a 3D printer tool changer which stores its tools on an elevator. The tools are exchanged by a cable pulling system. These two additional axes both need to be added to Marlin. Both axes need to run independently but not necessarily synchronized with any other axis. The elevator axis uses a home sensor. The cable pulling axis an end stop sensor.

One way to add these axis to Marlin would be by calling them an extruder. Extruder 4 and 5 to be precise. However, extruders don't have a homing functionality within Marlin. Here is where things become more difficult.

I have tried to figure out how Marlin handles end stops so I can add one to a specific axis. However I have been unsuccessful at this time. I don't understand how the whole end stop system works within Marlin.

I am in over my head on this one and need a push in the right direction. Any help would be greatly appreciated. How would you do this?

Video of the 3D printer with really bad software. The two additional axis are operated by WRITE to the step pin with delays....
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