Help!!!

[microzone]

Recently I have unscrew my old printer and saw there was a stepper motor inside. The stepper information is:-
Mitsumi motor
QH4-4112
7 ohm
M42SP-7

Actually I plan to use this motor but I do not have its data sheet. Do you have this stepper motor data sheet? Thank you first for your kind help.

 

[zevon8]

for some generic info, here is how it is likely wired:

**broken link removed**

The Mitsumi data sheet has no pinout, but the rest of the info is here:

**broken link removed**

 

[hotwaterwizard]

Datasheet
**broken link removed**

Wiring
**broken link removed**

 

[microzone]

Datasheet
**broken link removed**

Wiring
**broken link removed**

Thanks, hotwaterwizard. Do you know how to build a driver to drive the stepper motor? Thanks.

 

[hotwaterwizard]

I have never made a Steper Motor controler.
I did a search and found some great info for you though.
I just did a search with these words "stepper motor driver" and came up with thousands of hits so then I went to pictures and here are a few I came up with.

stepper motor driver

**broken link removed**
The blanked out words are. "electronic - circuits - diagrams"

https://www.electronics-lab.com/projects/pc/017/stepper.pdf

https://www.siliconchip.com.au/cms/A_100994/article.html

https://neil.fraser.name/hardware/stepper/cpu.html

**broken link removed**

 

[maf]

Information requirement

Hi all !
I did the same as microzone : unscrewed my old Apple StyleWriter 2400 printer and found 2 mitsumi M42SP-7 stepper motors.
Now I'd like to control them but I have one problem (I precise I am new to stepper motors controlling) :
On the link posted by zevon8 : **broken link removed**, it is written that the excitation method of this motor is unipolar driving.
However, only 4 wires come out from the motor PCB and I read everywhere on the web that 4-wired stepper motors were bipolar motors.
Moreover, among the 4 wires, 3 have the same color.
My question is : is my motor a unipolar or bipolar motor and how to distinguish the different phases since 3 wires have the same color ?
Thanks a lot for your help !!!
Maf.