Hi,

I want to share my mod of the E3D toolchanger, I had reliability issues with the tool change, so while tuning evrithing I came up with this and no more dropped tools!! (allignement of the tool/docking still important). Now I leave the printer unattended with no worries.

Print easily, require 2 M3x10 cap screws per sensor.

Link for the optical endstops:

https://www.amazon.ca/gp/product/B08SJLDNDP/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1

I will upload more pics for the wires connection but you can refer to duet 3d pinout

I did "TC_Position.g" to minimise tool docking position errors, recommend it's use.you can take my tc macros and whrite docking coordinates in the "TC_Position.g", (don't forget to add the variables declarations in your config.g, (#3in this text) )

Some things to add to toolchange macro and config.g(I'm currently running RRF 3.3.0).

#1-ADD to the config.g to configure endstop inputs:

;Tool detections M950 J4 C"!^duex.e2stop" ;carriage sensor (not yet implemented) M950 J0 C"!^duex.e3stop" ;T0 Parking Sensor M950 J1 C"!^duex.e4stop" ;T1 Parking Sensor M950 J2 C"!^duex.e5stop" ;T2 Parking Sensor M950 J3 C"!^duex.e6stop" ;T3 Parking Sensor

#2-TOOL CHANGE MARCOS (replace tool numbers for other tools)

; tfree0.g ; called when tool 0 is freed

set global.PCF_T0_Speed={fans[2].actualValue}

;Drop the bed G91 G1 Z4 F1000 G90

;if state.status="changingTool" ; M300 S1000 P500

;Purge nozzle ;if {heat.heaters[0].current} > 190 ; M98 P"purge.g"

;Move In G53 G1 X{global.TC_X_T0} Y150 F25000 G53 G1 X{global.TC_X_T0} Y200 F5000 G53 G1 X{global.TC_X_T0} Y225 F5000 G53 G1 X{global.TC_X_T0} Y{global.TC_Y_T0} F5000

;Open Coupler M98 P"/macros/Coupler - Unlock" M300 P250 S750 G4 P251

;fan off M106 S0

;Move Out G53 G1 X{global.TC_X_T0} Y200 F1000 M400 if sensors.gpIn[0].value != 0 ;Try to replace tool M300 P250 S750 G4 P251 G53 G1 X{global.TC_X_T0} Y{global.TC_Y_T0} F1000 M98 P"0:/sys/homec.g" G53 G1 X{global.TC_X_T0} Y200 F1000

M400 while true if sensors.gpIn[0].value != 0 M291 P"Replace tool 0" R"Human Help Needed" S2 Y1 M300 P250 S1500 G4 P251 M300 P250 S750 G4 P251 continue G4 P500 if sensors.gpIn[0].value = 0 break

G53 G1 X{global.TC_X_T0} Y175 F50000 M400

#3-(Optional) TOOL CHANGE MACRO (add to config.g)

;VARIABLES tool Change positions if !exists(global.TC_X_T0) ;T0 X global TC_X_T0=0 if !exists(global.TC_Y_T0) ;T0 Y global TC_Y_T0=0 if !exists(global.TC_X_T1) ;T1 X global TC_X_T1=0 if !exists(global.TC_Y_T1) ;T1 Y global TC_Y_T1=0 if !exists(global.TC_X_T2) ;T2 X global TC_X_T2=0 if !exists(global.TC_Y_T2) ;T2 Y global TC_Y_T2=0 if !exists(global.TC_X_T3) ;T3 X global TC_X_T3=0 if !exists(global.TC_Y_T3) ;T3 Y global TC_Y_T3=0 M98 P"0:/sys/TC_Position.g"