Acxico 2 pcs Mini 5mm 2-Phase 4-Wire 3V 5V Planetary Gear Stepper Motor Linear Screw Slider

Excellent!

Bought to experiment for control of n scale railroad switches

This stepper motor should be 4-wire and it is only 2-wire.

Used a multimeter to figure out the phase pair connections. Very quiet and minimal backlash

I chatted with the rep on Amazon, their supplier doesn't have/isn't willing to give them datasheets. I don't think this is the seller's fault, but it is unfortuntate. These motors need a stepper motor driver and heat up really hot. No documentation on mechanical, electrical, or how to solder them. About 30% of the 40 I bought are defective. This is ok though considering the price and considering that you get two per package. I'll update this review higher if the supplier provides documentation sheets. :-)

I am not able to use as there is not technical documentation supplie to show what is a/a- and b/b- pins on steppers. Have tried searching internet but have not come up with info for this model.

The description shows screw travel is 72 mm. Screw travel is only 21 mm.

Wire diagram not provided. Also don’t know how to power this device!