this post was submitted on 12 Oct 2025
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Has anyone run two nema dual shaft motors mechanically coupled in series? the Ender 5 plus uses a dual shaft to drive both Y axes, and I'm thinking of adding another, in series, coupled with an elastic coupler.

Thoughts?

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[–] empireOfLove2@lemmy.dbzer0.com 4 points 6 days ago (2 children)

What are you gaining by coupling them instead series? Are you trying to obtain higher accelerations? Never really heard of two motors before.

As long as the steppers have their steps in sync, I think it should work. If the step positions are out of sync even half a degree you'll be seeing motor heating and poor performance as the motors try to fight each other into position. But I feel like you won't see as much speed benefit as you think since you'll run out of belt tension and rail stiffness, causing unwanted vibrations and oscillation at higher acceleration.

[–] elucubra@sopuli.xyz 1 points 6 days ago

I'm thinking torque rather than speed. I have converted an Ender 5 Plus to Hybrid core Y, with the Endorphin mod and I'm mulling adding an extra stepper on the X, and increasing power on the Y, either with a larger Y dual shaft or adding an extra stepper on the Y in series.

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