2 Motors on single Extruder different Steps per MM

Hey Guys,

Long time reader first time posting but I am currently on my second 3D printer build. I've run into a problem I can't seem to get past. I need to run a second motor on a single extruder the problem is that they each have their own Steps/mm requirements or else I would just run two motors from a single driver. There is a very specific reason I need to run a Push/Pull filament setup otherwise I wouldn't. I know .92 allows for extra motors but they can only be controlled via additional m/g code commands and that isn't really what I want to do. Any help or direction as to how or if this is possible would be helpful. I'm not apposed to coding or modifying the code I just want to make sure where it would be best to make those changes in the code. Thank you all for any and all help.

Regards,
Brian

Hmm. Any ideas anyone?

If they are supposed to run at the same timethis is not supported directly.

You can play with mixing extruder and set ratio to 49:51 to have both extruders run during one extrusion. They will run roundrobin style so not the same time but every seconds step (for 50:50 or 500:500 change to make one faster). I guess this is the closest you can get without programming.

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Thanks so much for the advice. I may play around with it to see where the mixing extruder get me. In the case where I would like to hardcode something in, in what portion of the code should I start? Not looking for a detailed instruction just a general pointing in the right direction lol.

Thanks again,
Brian

It's all in Extruder.h/cpp step/unstep function. They exist twice - for normal and for mixing extruders.

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