Best posts made by KipK

I use some thermal pads under the glass when I need it. It sticks well to the magnetic surface.

Found it.

Seems I have to set also U and V to 0 reference after a Z probe.

Now it works.

macro calibrate Z max for each axis:

M208 S1 Z-3;	Allow z to be negative
G90; 
G1 X0 Y0  F10000; 		go to the center
G1 Z30 F1000;
G30		;		 probe bed and set z=0
G32		; 		start 3 point bed leveling
G1 X0 Y0 F10000;
G30     ;	Probe for Z=0
G1 Z10 F800				; raise nozzle
M584 Z6 U8 V7 P5 ; split z axis
G92 U10 V10; set U V axis to 10 as Z
G91		; relative mode
 
G1 H3 Z370 U370 V370 F1000; move Z, U, V down until endstops trigger and get new z limits

M500 P31		; save new z height
M584 Z6:8:7 P3 ; unsplit z axis
G90

Have to say, object models and conditionnal gcode is a killer feature.

I'm waking up this topic, ( deleted mine also ).

Here is my version of indirect filament reading, inspired by your ideas here.

It uses an 5mm shaft hobbed gear from Bondtech and U shape bearing on the latch.
Tensionning can be adjusted from the latch.

I use it outside of my DD carriage, don't have any problem with retractions ( considering I have 0.6mm retracts this prollyt explains why ).

https://www.thingiverse.com/thing:4882602

I get readings from 188% to 266% , average 230%. Is it acceptable or should I try to read around the 100% ? I think I can tweak it by adjusting the printed wheel diameter.

Don't forget that if your bed is not perfectly flat, bed leveling will try to align 2 points that are not necessarily aligned on the bed plane resulting in tilted bed.
Then you'll also need mesh compensation.

That's what I use here, bondtech hobbed gear.

So after using the calibration factor + few change on the indirect casing, I now have this reported values :

measured min 93% avg 101% max 107% over 12365.3mm

Looks far better than what I ever achieved with direct reading.
I still have some false trigger because of the PTFE tube moving too fast with high acceleration, I will restrain it before the filament reader.