Upgrading I3 (clone) to IDEX - some questions

caviara

Hi all,

i finally got some time to tinker again and I'm ready to finish this old project, but have some questions.
To begin with - I do upgrade my secondary i3-style (geetech clone) printer as a hobby, I am absolutely aware there are better options to build on top of, but this is my first printer and was my workhorse for many years, so it have a special value to me.

my current setup:
I3 clone, Cartesian, upgraded to IDEX (on X axis )
200/200mm bed
Duet mini 3+, with expansion board for the second tool (RRFW 3.5.0-rc1)
Tool 1 (left) - e3d Titan extruder, with V6 hot end (0,4mm hardened nozzle)
Tool 2 (right) - Orbiter 1.5, with V6 hot end (0,5mm nozzle)

My questions:

Is the sensor-less homing precise enough to use it on U axis (tool2)?
if yes on the above - will it be better to switch X axis (tool1) to sensor-less also?
due to the huge difference in the extruders, and my wish to keep rotational forces to minimum on both axes, my U axis (tool2) is +7mm in Y direction - Is it allowed at all, and is there any limitations to use it like so?

And to use this topic instead of opening a new one, one additional question in regards to my second machine (build from scratch coreXY with Duet6ch/RRFW3.5.0-rc1 and PanelDue 5i/FW3.5.0-rc7):

my panel Due 5i do not go to screensaver while printing (only), but do goes to screensaver while machine is idle, is this expected behavior and if not can it be fixed somehow?
I think it is like so, since Duet6ch was upgraded to FW3.4.6, and am pretty sure display did go to sleep before that.

o_lampe

@caviara

not precise enough for dual-material printing a single piece, but good enough for copy-mode printing
even worse
yes it's OK, you have to set z-offset anyway in the T1 tool definition. IIRC it would be G10 P1 X0 Y-7 Z?? (note the negative sign of +7)
IDK

dc42

@caviara if you are certain that the PanelDue screen saver behaviour has changed, please start a new thread about that.