E3D Toolchanger positioning issue

[arilies0]

Hi guys,
I have a Toolchanger printer from E3D with a DUET2 Ethernet card and a Duex5 extension card.
My Reprap firmware version is 3.2.2.

I have configured all the config.g file and the others files to correspond with my configuration based on hemera tools.

Nevertheless, I have an issue with the positioning system.
Indeed, if I take a tool for the first time (after homing) the toolchanger is perfectly positioned in front of the tool.
But when I take off the tool the position of the toolchanger has shifted from several milimeters.
Moreover this problem is worsening when I take an other tool (even when I try to take the same).
I have even noticed that sometimes the toolchanger is so much shifted that it is not able to take the tool. It can be shifted from several centimeters in X as in Y position.
Even worse sometimes when I try to home the axis the X or the Y axis don't indicate the good value and the toolchanger beat on the edges.

To conclude with my observations, in fact if the toolchanger belive that it is in X=10 (for exemple) but not in reality. The positioning is shifting randomly and I don't understand why.

So if you can help me I will thank you. Because for now I am lost.
I send you some of my config files.
tpre0.g tfree0.g homez.g homey.g homex.g homeall.g config.g

[dc42]

@arilies0 it's probably best to ask this on the E3D tool changer forum, although it's down at present. However, I suggest you concentrate on getting homing working properly before trying to do tool changes.

You may find my config files at https://github.com/Duet3D/RRF-machine-config-files/tree/master/E3D_Tool_Changer/dc42-wifi-centreZero-quadTitan useful, but bear in mind that these set the X0 Y0 origin at bed centre.