3d Printer Filament Length Readout

This is a Filament readout of the mm's of filament that has passed through the added encoder. The screen has a ST subtotal and GT a grand total readout. A short press of the tare button caused just the ST to reset to zero, a long hold will cause both readouts to zero. If power is removed the total's are lost but any calibration you did of course is retain. You can calibrate through a CLI on the serial port. Look at code documentation for clarity.

To get a warning of filament failure I added a simple quadrature encoder to the stepper gear of my Taz5. A special mount and circuit board uses 2 OPB761N opto's simply mounted to the corner of the stepper motor. This gives 24 steps per revolution so about .16 mm / step read. The AMT103V gives a much higher resolution, depends on the settings but with a setting of 384 steps/rev it about .05 mm per encoder step. This will be a separate creation call Taz5-6 Stepper Encoder. Go there to see construction and wiring.

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