Look at the inductance, and also the torque curves.
The higher current motors will have much lower inductance,which means they have more torque at higher rpm, for a given voltage.
AT has several 570 oz/in steppers. There are some that are rated at 3.5 amps
and they have some that are rated at 5 amps
here
How can motors with the same torque have different current ratings and what does that tell me?
Thanks
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Look at the inductance, and also the torque curves.
The higher current motors will have much lower inductance,which means they have more torque at higher rpm, for a given voltage.
Gerry
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Pls check specification here. They are different body size and specification:
https://www.automationtechnologiesin...lat-381-oz-in/
https://www.automationtechnologiesin...lat-570-oz-in/
Higher inductance in a stepper means the torque falls off faster at high RPM's (with the same voltage.) So basically, with the same voltage the 5A stepper will be able to run faster than the 3.5A one.