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  1. #1
    Join Date
    Jul 2005
    Posts
    66

    Scored some steppers!

    At work they were tossing out a bunch of old electronic equipment. I scored quite a few steppers, including a few which are 1A 3.2 volt, and the online spec says they are 1.30 lbs/in torque! (wow) and 1.8 deg per step..these things should have some nuts. Now I probably could build that cloth cutter or a very large plotter...

    -nt20

  2. #2
    Join Date
    Mar 2003
    Posts
    35538
    1.3 lbs-in = 20.8 oz-in.
    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
    http://www.g-forcecnc.com/jointcam.html

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)

  3. #3
    Join Date
    Jan 2005
    Posts
    1695
    If that's the stall torque, then the motor is surprisingly weak for something that draws 1 amp.

  4. #4
    Join Date
    Apr 2004
    Posts
    678
    1.3lbs-in = 0,15Nm !!
    If there are any nuts involved, they must be wedged inside!

    My guess is they are 1,3Nm. That seems about right for 1A 3,2V if it's a fairly modern design. (1,3Nm = 184 ozf-in).

    Einar

  5. #5
    Join Date
    Nov 2005
    Posts
    105
    what about printer stepping motor ? Mitsumi M42SP-5

  6. #6
    Join Date
    Jul 2005
    Posts
    66
    Aw crap you guys are right - I looked at the datasheet and it is only .7125N-m so yes 1.3lb/in is correct. Guess it's not so hot then. Should still be plenty powerful enough for a large belt driven plotter though.

    I couldn't find any printer steppers around here lately.

    -nt

  7. #7
    Join Date
    Apr 2004
    Posts
    678
    Quote Originally Posted by nikolatesla20
    I looked at the datasheet and it is only .7125N-m so yes 1.3lb/in is correct.
    Uhh!?!?! Is it?

    Go get this, and try again:
    http://www.joshmadison.com/software/convert/

    Einar

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