Problem Operating CNC router at 25mtr/minute

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Thread: Operating CNC router at 25mtr/minute

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    Default Operating CNC router at 25mtr/minute

    Hello There
    It took me 3month to build cnc router
    I am wondering where did missed
    My specs are as follows
    Working area:4*8 feet
    Actuation:TBI ball screws 3210 2510 and 1610 for xyz axis respectively And hiwin linear guide and bearing.
    Stepper motor: 1200oz-in (4.5 amp & 70v) and drive are of 6 amps 80v ac )
    Power supply: i have provided 80v and 6amp to each stepper /driver.
    I am running my cnc router 6mtr/m
    Successfully when drives is set on 6amp
    My stepper motor heats like hell
    When i reduce current my max speed also get reduced.
    Recently my friend showed broucher of some company.
    Company is claiming that max speed will be 25mtr/m that seriously gives me an anxiety. This is hard to believe where did i missed. Why i cant achieve this speed.
    And one more thing is that they are using rack and pinion.
    How this is possible.
    My steppers stalls whenever i try to go above 6mtr/m



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    Community Moderator ger21's Avatar
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    Default Re: Operating CNC router at 25mtr/minute

    If you want 25m/min, you need to be using AC servo motors and ballscrews with 25-32mm pitch, or rack and pinion.
    You'll never be able to spin large stepper motors anywhere near as fast as you'd need.

    If you run 4.5A motors at 6 amps, the motors will not last long.

    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)


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    Default Re: Operating CNC router at 25mtr/minute

    Thanks I agree with you
    But i guess giving current is not in out hand it is taken by motor(source).
    Is it like my motors will consume more current than it is rated?
    I am sure if it is so there will be problem.


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    Community Moderator ger21's Avatar
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    Default Re: Operating CNC router at 25mtr/minute

    The motors don't control the current, the drives do. You need to set the drive current to match the motor's ratings.

    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)


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    Default Re: Operating CNC router at 25mtr/minute

    I did same
    But it reduced my max speed by 2000mm/minute.
    Is there any way to make it more fast.

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    Default Re: Operating CNC router at 25mtr/minute

    Quote Originally Posted by Junaidzia View Post
    I did same
    But it reduced my max speed by 2000mm/minute.
    Is there any way to make it faster.

    Sent from my Redmi Note 3 using Tapatalk


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    Community Moderator ger21's Avatar
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    Default Re: Operating CNC router at 25mtr/minute

    Buy motor with a higher current rating, and drives that can provide a higher voltage.
    Get some 7 amp motors, and maybe drives like these:
    https://www.automationtechnologiesin...vers/kl-22083/

    But you still won't get anywhere near 25m/min. I think the best you could hope for would be 8-10m/min, but you may not even see that.
    If you want more speed, get some 3000 rpm 750w ac servos with a 2:1 belt reduction. That would give you 15m/min, if you don't have any issues spinning your screws at 1500rpm.

    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)


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    Default Re: Operating CNC router at 25mtr/minute

    Thanks
    That means i only need to buy ac servo motors and drives.
    As you said i am already using reduction 1:2(timing belt and pulley)
    I am rotating nut.
    That cured my motor stalling and vibration problem.



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    Default Re: Operating CNC router at 25mtr/minute

    Thank you very much
    It will help me a lot 😊
    God bless you

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    Default Re: Operating CNC router at 25mtr/minute

    Hi,

    Quote Originally Posted by Junaidzia View Post
    I am rotating nut.
    Would love to know more about these nuts !

    Thanks in advance

    Good evening

    Envoyé de mon A0001 en utilisant Tapatalk



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    Default Re: Operating CNC router at 25mtr/minute

    Quote Originally Posted by silopolis View Post
    Hi,



    Would love to know more about these nuts !

    Thanks in advance

    Good evening

    Envoyé de mon A0001 en utilisant Tapatalk
    Not special nut same nut used in rotating ball screw mechanisms.




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    Default Re: Operating CNC router at 25mtr/minute

    Quote Originally Posted by Junaidzia View Post
    Not special nut same nut used in rotating ball screw mechanisms.




    Sent from my Redmi Note 3 using Tapatalk
    Although​ there are ball nuts specially for that perpose

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