Be aware that the length and angle of the arm holding the servo is specific for my printer, so you may need to modify the attached fusion 360 file.
The mount of the arm is for a 2020 extrusion using 2 2020 t nuts and 4mm screws.
Just cut of the the handle of the brush to size. And the arm that folows with the serve is glued onder the brush holder and screwed to the servo
For the Duet WIFI I connected it:
GND(brown) pin 30 GND
+5V(red) pin 1 +5V
signal(orange) pin 13 Heater 4
Then in the config.g
M307 H4 A-1 C-1 D-1 ;disable heater 4 to be used to control brush servo
M280 P4 S0 to store the brush
M280 P4 S160 to deploy the brush
this depends a bit on how you orient the brush on the servo
My start.g deplays, moves the head and stores the brush
G21 ;metric values
G90 ;absolute positioning
M107 ;start with the fan off
M376 H10 ;taper off bed level compensation
G1 X15 Y15 Z5
G1 Z0.2 F3000 ;move the platform down
G1 X115 Y5 E10
G1 Z21.75 F3000 ;move the platform down
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