Ace Pro Alternative Filament Sensor

The filament sensor to my ACE Pro had broken, so I tried to replace it with a direct detection method while I waited for the replacement parts.

I tried to eradicate the need for the spring loaded arm that malfunctions from time to time.

Similar parts have been around for older versions of the ACE Pro. My version however does have a different filament path.

This is a work in progress. My first trials were successful, however. Give it a try and tell me where I can improve things.