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Thread: Stepper motor heat and low torque

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    Member Azalin's Avatar
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    Default Stepper motor heat and low torque

    Hi,

    I have wired the stepper in parallel configuration however the moving torque is extremely low and it is overheating. While it is revving I can easily stop the motor by holding its pulley. Holding torque is fine however.

    I feed the driver of the motor with 30v DC and output current is set to 4.25 amps

    Would it help wiring the motor in series?

    Motor 86 HS 45 http://www.leadshine.com/UploadFile/Down/86HSxxd.pdf
    Driver CWD860 (aka M860) https://www.circuitspecialists.com/c...498/CWD860.pdf

    Thanks in advance,
    Best

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    Suat
    Proud father, C# developer, Model heli pilot, newbie free time machinist for hobby


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    Member ger21's Avatar
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    Default Re: Stepper motor heat and low torque

    Do you have the current reduction turned on (sw4)?

    How big is the pulley, and how fast is it spinning when you try to stop it?

    At 4.2 amps, you only have about 2/3 of the rated torque, and for max performance, you should be using a 60V power supply.

    Gerry

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    Member Azalin's Avatar
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    Default Re: Stepper motor heat and low torque

    Current reduction is disabled to get max possible torque.

    Pulley on the motor is 24 teeth T5 about 40mm diameter. Pulley on the ball screw is double. Speed is max 2000rpm.

    You are right. Maybe I shoult get a transformer for higher voltage.

    Sent from my GT-I9300 using Tapatalk

    Suat
    Proud father, C# developer, Model heli pilot, newbie free time machinist for hobby


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    Default Re: Stepper motor heat and low torque

    Current reduction is disabled to get max possible torque.
    That's why your motors are hot. Enable it, as it has no effect on torque, except when the motor is not spinning.

    And increase the current to 5-6 amps for more torque.

    Gerry

    UCCNC 2017 Screenset
    [URL]http://www.thecncwoodworker.com/2017.html[/URL]

    Mach3 2010 Screenset
    [URL]http://www.thecncwoodworker.com/2010.html[/URL]

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

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


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    Default Re: Stepper motor heat and low torque

    Quote Originally Posted by ger21 View Post
    That's why your motors are hot. Enable it, as it has no effect on torque, except when the motor is not spinning.

    And increase the current to 5-6 amps for more torque.
    Great. Thanks ger. I will give it a try.

    Sent from my GT-I9300 using Tapatalk

    Suat
    Proud father, C# developer, Model heli pilot, newbie free time machinist for hobby


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    Default Re: Stepper motor heat and low torque

    Quote Originally Posted by ger21 View Post
    and for max performance, you should be using a 60V power supply.
    Ger,

    60v AC or DC?


    Sent from my GT-I9300 using Tapatalk

    Suat
    Proud father, C# developer, Model heli pilot, newbie free time machinist for hobby


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    Member ger21's Avatar
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    Default Re: Stepper motor heat and low torque

    DC

    Gerry

    UCCNC 2017 Screenset
    [URL]http://www.thecncwoodworker.com/2017.html[/URL]

    Mach3 2010 Screenset
    [URL]http://www.thecncwoodworker.com/2010.html[/URL]

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

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


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Stepper motor heat and low torque

Stepper motor heat and low torque