Mix: Both stepper motors turn at the same time

ic2dcom

Hello, I've been trying to get a mixing extruder to working but everytime I set the firmware (92.3) to mixing extruder and test it in Repetier-host, both extruder turn at the same time, even when switching between extruder. I ran it as a dual extruder and it works fine but when I turn mix on in the firmware, both turn at same time. I've check the printer setting in Repetie-host to make sure it was set for mix too.

Any suggestions would be greatly appreciated.
Thanks
ic2dcom

Repetier

Please read our documentation for it:

https://github.com/repetier/Repetier-Firmware/blob/work092/doc/Mixing%20extruder%20theory.txt </div><div>

I guess all extruders have the same weights for all virtual extruders. You need to first define your weights in eeprom to change the weights like you want them.

ic2dcom

Ok, that makes sense. I used the m163 & m164 and it works great. You mention that I need to set the weights in the eeprom.

The eeprom setting show 16 Extr 1 Weight with a value of 10. So do I change the first one (Extr 1 Weight 1 to 100 instead of 10 and then set the rest of the weights to 0. Is that correct?

There isn't a way set these weights up in the configuration.h yet?

Repetier

The weights can not be set from config file. Always initalized as 10 for all.

First weight for extr 1 and ext 2 correspond to T0 command, second to T1 and so on. Setting weights to 0 means does not use extruder.

Example

100 0 : T0 = 100% extruder 1

0 100 : T1 = 100% extruder 2

50 50 : T2 = 50% each

25 75 : T3 = 25% extruder 1 , 75% extruder 2

So you don't need M163 once they all have good meanings you switch with extruder selector.

ic2dcom

Got working. Thanks for all your help. :)

Now I have to work on setting the retraction so I don't end up with back-flow again.

kulitorum

I am experimenting with multi-extruder retraction using the G10 and G11 codes, which (in my hacked firmware) makes both extruders retract and un-retract at the same time. This limits back-flow and removed stringing.

Problem is finding a slicer that takes G10 and G11 seriously. Most will generate the codes, but on all moves, even going from perimeter to perimeter.

Repetier

Which trick did you use to make both retract without confusing the rest of the system?