Help needed with stepper motors

[timeout555]

Hi guys, I have pulled out 3 stepper motors from old HP laser jets, the motors seems to be very powerfull, i suppose they are functional, but since i do not have a diagram, i cannot wire them up to my CNC driver, there are 6 leads coming out of the motor, but not sure if it is a unipolar or bipolar,

i would really appreciate it if you can offer some help here.

thanks

[Bryanpl]

Does this help

http://techref.massmind.org/techref/...pper/wires.asp

[kreutz]

Originally Posted by timeout555 ... there are 6 leads coming out of the motor, but not sure if it is a unipolar or bipolar, i would really appreciate it if you can offer some help here. thanks

6 leads motor could be used as unipolar or bipolar.

[timeout555]

Thank you guys,

now assuming that i could figure out which lead is which, A1, A2, B1, B2, i am left with 2 common leads, these 2 leads do not get connected?

[kreutz]

Originally Posted by timeout555 Thank you guys, now assuming that i could figure out which lead is which, A1, A2, B1, B2, i am left with 2 common leads, these 2 leads do not get connected?

Yes, you need to leave 2 leads disconnected (one on each phase) when driving it as bipolar. If you leave the center tap disconnected you are driving it "Full coil" equivalent to a bipolar series connection with all its disadvantages. if you use one extreme and the center trap (leaving the other extreme unconnected) for each phase, then you are using in "half coil" connection.

[timeout555]

Thank you very much for your help, i was able to connect the 4 leads to the driver, the motor locked, which means it is operational and produced some noise.

connecting the driver to the breaker is not difficult, i guess i will just connect 2leads (step+direction) to the breaker.

but I have to setup MACH3, pins and ports and so on, this is like chinese to me.

your help is greatly appreciated

[kreutz]

Originally Posted by timeout555 Thank you very much for your help, i was able to connect the 4 leads to the driver, the motor locked, which means it is operational and produced some noise. connecting the driver to the breaker is not difficult, i guess i will just connect 2leads (step+direction) to the breaker. but I have to setup MACH3, pins and ports and so on, this is like chinese to me. your help is greatly appreciated

i guess i will just connect 2leads (step+direction) to the breaker.

add a GROUND connection from the breakout to the driver.

Look at the instructions for your breakout board (or pin assignment) in order to configure Mach3. You need to know if the signals are active high or low and the pins used for each one.

[timeout555]

Thank you very much,

I hope you appreciate my frustration, I am through with building the structure for the machine, I have the motors, the driver and the software, but cannt jog the damn thing.

Taking 1 lead from the driver to the breakout ground causes the motor to move CCW, I guess this is not right.

I followed pins on the driver, but cannot figuer out ports to assign on MACH3.

Thank you again for your help

[kreutz]

Look at the following two screens under Config Ports and Pins:

[timeout555]

Thank you very much my friend, followed your instructions, got the motor moving CW and CCW, but the movement is kind of sluggesh and slow.

the motor produces little noise, but when I statrt MACH3 the noise becomes higher, and the motor moves one step back and forth, with smaller motor the motor steps CCW.

[kreutz]

Originally Posted by timeout555 Thank you very much my friend, followed your instructions, got the motor moving CW and CCW, but the movement is kind of sluggesh and slow. the motor produces little noise, but when I statrt MACH3 the noise becomes higher, and the motor moves one step back and forth, with smaller motor the motor steps CCW.

Now I need to know more about your power supply and driver board. Please, tell me all you know about them, and if you adjusted the maximum current for your motors.

[timeout555]

Dear Friend,

I got the stepper drivers and the breaker from Rout Out CNC based in the UK, you can follow this link for driver's specs:

http://www.routoutcnc.com/RoutOutCNCStepper.pdf

As for power supply I bought an AC/DC converter off the shelf of a hardware store, you can get from 3 volts upto 12volts, when i get home i can give you how many amperes (sp?) does it give. I am running the motor on 4.5 volts.

Execuse my ignorance for all of this electornic staff is new to me.

thank you very much