Hello, I fixed a 15g weight on a 40cm aluminum bar. This bar is fixed perpendicular to the axis of my Nema 17 stepper motor and my weight rotates very well, with good acceleration and at high speed. My aluminum bar weighs 30g, but whatever. NEMA 17. Mine is the 7th Holding Torque (N.cm Min) 40 …

Well, my maths (questionable) says about 53Ncm for a 30g bar with a 120g mass 40cm from the shaft center, so you would need at least 1.5:1 torque increase / speed decrease. But remember, stepper motor torque falls off as speed increases. Find the speed / torque curve for your motor.

Stepper motor coupling NEMA 17. Which good reducer to choose?

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JCA34F December 3, 2021, 1:18pm 4

Is the motor shaft connected to the center of the bar (balanced) or one end? Is the motor shaft horizontal or vertical or...?

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Stepper motor coupling NEMA 17. Which good reducer to choose?

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