2nd extruder ignores steps

Hi,

while configuring dual extrusion, I noticed that my 2nd extruder was only extruding roughly half the filament it should.

I checked the config and found that the steps per mm where correct (800 on a titan with DVR driver) but just for fun I doubled them again to 1600.
Still after commanding 100mm I only get 49mm.

My config —> pastebin[.]com/Def1kxjk im using the latest edge version, with a custom config due to using re-arm

Any ideas appreciated

Imported from wikidot

This sounds like a problem with wiring and connectors, having only 3 of the 4 stepper wires going to the driver, can you try inverting motors and inverting drivers ?

I checked continuity of all the motor wires and that checks out. I think a wire break in one of the strands would stop the motor from moving at all and make that clicking sound, which Im not hearing here.

I switched the motors around and that switchtes the problem around as well. I also replaced the driver of the 2nd extruder which also changes nothing.

No actually it would cause something very similar to what you see ( or even exactly that ).

You say it switches the problem around, but which way ?

I switched both motors on the other driver and switched the drivers as well.

The 1st extruder slot is working fine and the 2nd one cuts everything in half.

I still have to switch the extruder config around.

I can’t seem to find or load you config file.

cant post links atm. but without the [] around the “.” the link shoud work

In the meantime I also switched the steps in the config between the extruder modules with the results that the extruder works well now but not the original one. I also tested a different motor on the 2nd extruder driver slot, that also cuts the steps in half and I checked the pins.

In summary. The motors and cables are fine, the drivers and their slots as well. Just the config module of the 2nd extruder behaves weird.

Got it!

The config override for some reason has an M92 Exxx in there. Not sure how it got there but it works now.