Hi,
there are many manufacturers most of whom will have very similar steppers....all you have to do is select the low
inductance ones.
Typically low inductance steppers have a high current rating for the torque they produce because they use fewer turns but a larger diameter wire.
This tends to result in high current but comensurately low inductance.
First time buyers look for the highest holding torque but overlook inductance, manufacturers know this and produce high torque motors
but have high inductance and consequently lose steps or stall above a few hundred rpm.
Its common to have from one manufacturer a 570 oz.in stepper say, and a 450 oz.in one say, both the same size. The stronger one is better right?
Well maybe not...the lower torque unit has low inductance and will still be producing useful torque at 1000 rpm whereas the high torque unit
will have stalled at 400-500 rpm.
The main way to counteract the adverse effects of inductance is to have the highest possible voltage drivers and power supply. At the current time the
highest voltage drivers readily available are 80V. I would recommend them. You need to match it to an 80V power supply, a transformer type is
preferred over cheaper switch mode supplies.
Craig