Need Help!- sanyo Denki stepper motors

[Djk]

Can you guys help me, which is the best motor

Sanyo Denki SM2862-5255
bipolar
6A/phase
Holding torque 7 NM
Resistance 0.36 Ohm/phase
inductance 2.8 mh/phase


Sanyo Denki SM2862-5155
bipolar
4A/phase
Holding torque 7 NM
Resistance 0.83 ohm/phase
inductance 6.4 mh/phase

Is it better to have more inductance or more Amps
Thanks

[Pandinus]

With a Higher inductance the current/magnetic field take longer to reach full strength.
So a lower inductance allows for a higher switching speed and therefore more usable torque at higher speeds, if that's what you want...

Between the two, not counting the Drive used, I'd guess that the -5255 would get you higher speeds and acceleration than the -5155

There are a lot of factors in motor selection... The larger the motor (physically,) the higher the rotational mass so the more power required to accelerate and decelerate just the motor... "Sometimes" a smaller motor can perform better depending on the rest of the system...

[Djk]

Thanks pandinus I will go for the 6A motor