This Tool watches, if the Filament actually moves, when it is supposed to.
If it fails due to a break ,jam, or just end of spool, Marlin will automatically pause the printer job
, turn off the temperatures and move up Z by 10 mm.
The user has enough time then to fix the jam, recover position and temperature and continue the job
without much interference.
- Greg Wade's Bowden Extruder ( http://www.thingiverse.com/thing:18379 )
- HAL Sensor (e.g. A1208, SIP Case , http://www.farnell.com/datasheets/91151.pdf)
- Marlin Firmware
- 8pole pin connector(male) with ribbon cable
- tiny magnet with 2mm diameter and 2 mm hight
- RAMPS 1.3 or 1.4 Board
install the idler.
put the magnet centered onto the black ring of the idler
Create these connections on the pin connector
AUX1 - Purpose - HAL pin(watch datasheet)
1 - VDD - 1
2 - VDD
3 - GND - 2
4 - GND
5 - D57 - 3
6 - D1
7 - D58
8 - D0
Install the HAL sensor into the hole of the plastic and connect it to AUX1 of RAMPS
Install the Part as a replacement for the existing one into the Extruder.
Integrate the patch into the marlin firmware, recompile and download
In operation, the D57 shall switch on and off when rotating the wheel. If it does not work,
mirror either the sensor or the magnet.
The Firmware patch is not yet stable. The reference counter is not always correctly initialized. Maybe Erik Zalm sees the flaw right away.