Underextrusion with Bondtech qr

[kwill5800 2]

I never thought i would be saying this but im having underextusion issues on my um2 with a bondtech qr extruder. I think its a problem with the firmware though. I prefer tinker firmware so i am using that instead of the bondtech firmware. I think its a problem with the esteps value. Ive tried "printing" a gcode file with the Esteps command and also pronterface but both don't seem to work. Is there a way to directly check if the esteps value was uploaded and saved? Or is there  way i can modify tinker firmware and change the esteps value and the loading speed? Or am i doing something completely wrong?

Esteps value:492.45

loading and unloading speed 50mm/s

[Smithy 1,141]

With the Tinker FW you can set the steps directly via the menu. I don't know out of my head where it is but look through the menu.

 

you can also check it with the gcode M503 if I am not wrong to see the stored values.

[kwill5800 2]

When i use bondtech firmware for some reason, the printing is fine, but it underextrudes with tinker's firmware. Any Idea why?

 

[Smithy 1,141]

Have you changed the E-steps in Tinker FW?

[Smithy 1,141]

And have you done a factory reset after installing the Tinker FW? 

It is really important to do a factory reset when you change between stock and Tinker FW.

[kwill5800 2]

hm... let me try

[kwill5800 2]

It seems to work but it still is slightly underextruding. i measured off 100mm on filament and took off the nozzle to remove resistance and I extruded 100mm using pronterface but it didn't extrude the full 100mm. Its like 3-4mm short. Any ideas? 

This is what the underextrusion looks like. Notice the gaps between the lines. Its kind of hard to see.

Edited December 17, 2020 by kwill5800

[GavBak 1]

I am having the exact same issue, was there any resolution to this?

[Minou073 3]

Exactly the same problem if I tried to find a better step/mm with a rule of 3 but its always wrong. Never found a issue so I print with a 110% flow and now all my prints are ok....