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stepper motor controller

tonitoni Posts: 2
edited 2006-07-04 17:24 in General Discussion
Hi.

I have a 6 wires stepper motor that needs to be converted to·4 wires. I don't know how ?

can somebody give me a hand.

thanks.

Comments

  • bennettdanbennettdan Posts: 614
    edited 2006-06-13 06:42
    What do you mean 4 wires I think you have a uni polar stepper motor. Please tell us if it has any info on the name plate.
  • ktekxktekx Posts: 71
    edited 2006-06-13 06:50
    If it has 6 wires, its probably a unipolar, you can drive unipolars as bipolars though (but not vice versa).

    toni, your 6 wire stepper motor probably has two common wires connected at the center of each pair of two coils. You can determine which two wires are the center tapped wire by measuring the resistance. End on end between two coils, the resistance should be aproximately double the resistance of that which is from coil to its center tapped wire (the common wire) since there are two coils in series with each other.

    step-fig-3-1.gif

    I found a better picture, here you go.

    Hope that helps.

    Post Edited (ktekx) : 6/13/2006 9:25:56 AM GMT
  • tonitoni Posts: 2
    edited 2006-06-13 10:55
    Hi. thanks for the help guys. On the back of the motor its written:

    type : 4H4018S0623 1.8 DEG, 15 volts, 0.4 A

    And it has 6 wires 2 of them are brown and the four remaining are white, blue, red, yellow.

    maybe the 2 connected wires are the 2 brown ones ?

    Should i neglect these when i connect it as four wires. ?

    many thanks.
  • bennettdanbennettdan Posts: 614
    edited 2006-06-13 17:28
    You can take a multimeter and ohm out the coils the brown wires are probably a and b of the coils but the meter will tell you three wires will have resistance telling you it is one coil and the other three will be the other coil then you can tell between a and 1a and 1b a to 1a and 1b will have about the same resistance and between 1a and 1b will have about twice the resistance then you can put power to a and 1a to see what direction it steps. Then you can do the same for the other coil.
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2006-06-22 16:46
    This thread is being moved from the·Completed Projects·Forum to the·Sandbox Forum.

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    Chris Savage
    Parallax Tech Support
    csavage@parallax.com
  • soudehsoudeh Posts: 2
    edited 2006-07-04 07:24
    Hi. thanks for the help guys. On the back of the motor its written:

    type : 4H4018S0623 1.8 DEG, 15 volts, 0.4 A

    And it has 6 wires 2 of them are brown and the four remaining are white, blue, red, yellow.

    I can not to find the ground.plz help me!!!

    many thanks.
  • Bruce BatesBruce Bates Posts: 3,045
    edited 2006-07-04 08:53
    soudeh -

    Generally speaking the two common colored wires are the "ground" wires. This can be proven by use of an ohmmeter. If you need the troubleshooting sequence, just ask.

    Regards,

    Bruce Bates

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  • bennettdanbennettdan Posts: 614
    edited 2006-07-04 17:24
    Looking at the digram ktekx has in his reply post to you the brown wires are most likely A and B and this should be your ground. You can take a volt meter set to read OHMS and then put one lead on one of the brown wires then touch the remaining four colored wires and the two wires you get a resistance reading will be 1A and 1B then you can do the same for the other brown wires and colored wires. I use a 9v battery and connect to one of the brown wires then on one of the color wires at a time to see which way it steps then you will know which wires are which as far as which direction it turns. example A to 1A will step one direction and 1 to 1B will turn the other...I hope this helps.
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