SN04 Sensor holder for ANET A8 by AUREL_14

Last crawled date: 2 years, 12 months ago

Very simple part to mount the SN04 inductive sensor.
The differences with the original are :
Add a guide to easily adjust the position of the sensor.
Add nut shapes
You'll need 2 M3 screws and nuts.
Synet3D firmware: https://drive.google.com/file/d/0B0Jb9SruV4vGM1hDZnhnd3Q3WUU/view
Cura printer parameter :
=> Start gcode :
G21 ;metric values
G90 ;absolute positioning
M82 ;set extruder to absolute mode
M107 ;start with the fan off
G28 X0 Y0 ;move X/Y to min endstops
G28 Z0 ;define the 0 software position
G29 ;auto leveling on 9 points of the bed
G1 Z15.0 F{travel_speed} ;move the platform down 15mm
G0 X2 Y2 Z2
G92 E0 ;zero the extruded length
G1 F200 E25 ;extrude 3mm of feed stock
G92 E0 ;zero the extruded length again
G1 F{travel_speed}
M117 Printing...
=> Stop gcode :
;End GCode
M104 S0 ;extruder heater off
M140 S0 ;heated bed heater off (if you have it)
G91 ;relative positioning
G1 E-1 F300 ;retract the filament a bit before lifting the nozzle, to release some of the pressure
G1 Z+5.5 E-5 X-20 Y-20 F{travel_speed} ;move Z up a bit and retract filament even more
G28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way
M84 ;steppers off
G90 ;absolute positioning

Below a summary of the offset setting steps:
If you don't use octoprint, connect your computer with printer with your SUB cable.
Launch pronterface software, you can download it her http://www.pronterface.com/.
With pronterface you can control the motors and sens commands in a terminal.
Preheat nozzle and bed (nozzle 200°C / Bed 60°C)
In a terminal, send this command: M851 Z0
In a terminal, send this command: M500
In a terminal, send this command: G28 (Lanch autolevel for all axis)
In a terminal, send this command: G1 X110 Y110 (Move the nozzle in the center of the plate).
Place a paper below the nozzle
With octoprint or pronterface, move down the nozzle 10mm.
Move down the nozzle 0.1mm per 0.1mm until the paper can't move.
Move up the nozzle of 0.1mm
On your printer screen, note the Z level value (for exemple 1.2)
In a terminal, send this command: M851 Z-X.XX where X.XX is the noted value.
In a terminal, send this command: M500 (to sauve the offset in the EEPROM)