Auto Filament level indicator

This is Auto Filament level indicator that use a plastic spring to indicate amount of left filament.

• Set minimum layer time to close to 10s while printing front lever
• Both front and back lever have to be glued in place as shown in 3rd picture
• Both lever must be perfectly aligned/parallel to each other
• then device can be mounted on spool with tissue tape or double sided tape

NOTE :- This model is based on Numakers spool dimensions there could be minor inaccuracy in measurement for other brands