I bought a small stepper motor on Ebay where the wires were named abcd. Which of these belongs to the a- a+ b- b+ connection on the driver?
1pcs 25 stepper motor 4-phase 5-wire thin step stepping motor 0.4M With gear | eBay
I bought a small stepper motor on Ebay where the wires were named abcd. Which of these belongs to the a- a+ b- b+ connection on the driver?
1pcs 25 stepper motor 4-phase 5-wire thin step stepping motor 0.4M With gear | eBay
if you use a multi meter set to "ohms"
measure the resistance between each wire and the other 4 in turn
the resistance between the common and each coil will be the same
between two coils you will measure twice the resistance as the common and a coil
I'm not sure if all motors use the same colour coding
but this may help
John
PS
this diagram I have just found on the net does not match the previous picture !!
On a 4 wire motor you can identify the coils easily as follows:
1. Turn the motor shaft with all wires disconnected and not touching each other and feel how hard it is to turn
2. Short any 2 wires together
3. Turn the motor with the 2 wires shorted. If there is noticeable increased torque required and you feel the "steps" then the two wires shorted together are for one coil. If the torque feels the same then use a different pair of wires shorted until you do feel a definite increase in torque. Once you find one coil the other 2 wires are the other coil. You now have two pairs.
As far as A+ A- B+ B-, it really doesn't matter. Just hook one coil pair to the A+ and A- terminals in either order, and the other pair to B+ and B- in either order and the motor will work. If it turns the wrong direction you can either switch it in software, or just switch A+ to A- and A- to A+.
OOps. Just saw it is a 5 wire motor. and not a 4 wire. Now you would need an ohm meter as the easiest way.
I'm not sure you can use a 5 wire motor on a bipolar drive.
Hi 109jb
I nearly fell into the same trap
a- a+ b- b+ = bipolar motor = easy to find the wire pair
butI looked at the ebay listing to find its a 5 wire unipolar motor before I posted
On this site I found the text: 5-Wire Motor
This style is common in smaller unipolar motors. All of the common coil wires are tied together internally abd brought out as a 5th wire. This motor can only be driven as a unipolar motor.
https://learn.adafruit.com/all-about...es-of-steppers
It looks like the motor I bought also is a 4 phase motor, so maybe I can´t run it with a bipolar driver? I wanted to try it on this one:
DC Adjustable Speed Stepper Motor Pulse Driver Controller with Remote Control | eBay
Hi jaru-eri
the motor you have can not be used with the remote controlled stepper driver you have
DC Adjustable Speed Stepper Motor Pulse Driver Controller with Remote Control | eBay
I can not see any current limiting on the control board so you need to use low current 5 Volt motors
It looks like an ATMEL micro control IC is driving the motor directly
you can use 4 , 6 or 8 wire but not the 5 wire
with the 8 wire motors you will need the data sheet to identify which pair coils are wound together and when correctly phased,
can be connected in parallel or series to form a single coil
John
I´ve now order this one:
DC 5V NMB 35mm Round Thin 2-phase 4-wire Stepper Motor Micro Stepping Motor+Gear | eBay
So maybe I get better luck this time..
Hi jaru-eri
the new 4 wire motor should work
having the details of the wire colour coding will make it easy to wire correctly
John