Stepper Motor Torque Measurement

The torque speed curves for a stepper motor are developed with a specific motor drive combination operating voltage and driving method.

Stepper motor torque measurement.

My current idea is to use a system similar to the one below but mine would have a 20 tooth pulley on the stepper motors and 60 tooth to drive the belt that moves the print bed up and down. After calculating the required torque a stepper motor can be used in low speed applications. The picture above shows what that measurement means and a method of actually measuring it. Holding torque is a measurement of how much rotating force is required to force a stationary stepper motor shaft out of position.

Any deviations from the stated motor drive combination and operating conditions can change the system s torque speed characteristics. Holding torque t is the product of a motor s torque constant kt and the current i applied to the stator windings. But how do you compare motor performance between motor suppliers. Honestly this is strictly a cost saving measure but i d hate to waste the money and then find out i have to have an 80t or 100t pulley instead of the 60.

With the right frame size a stepper motor can work on its own without the need for a gearbox. If the motor can hold a weight of 100oz on a 1 inch radius pulley it is said to have a stationary holding torque of 100oz in and is therefore sold as a 100oz in motor. Begingroup whatroughbeast i need the torque and angular velocity at the output. I planned to fill the cup with a bunch of steel sleeves as balast up to the point where the motor couldn t carry the load but the apparatus was already too heavy for it.

My original idea was to run the motor at higher rpm and measure the torque from the motor and the use 1 10 or 1 100 belt drive to step it down. Stepper motor speed torque curves show how much torque is available from a stepper motor at a given speed when combined with a particular driver.