584,808 active members*
5,158 visitors online*
Register for free
Login
IndustryArena Forum > MetalWorking Machines > Novakon > Torque needed for Pulsar servos
Results 1 to 10 of 10
  1. #1
    Join Date
    Jan 2016
    Posts
    120

    Torque needed for Pulsar servos

    Hi guys,

    I'm still planning out some upgrades to my Pulsar. The servo option for the Pulsar has 1 kw XYZ axis motors that provide 4 Nm of torque (continuous). How much torque do you think these axes should have? I've been looking at various servos and drives, but most servos of a similar size provide just over 3 Nm of torque and a higher speed.

    Thanks!

    Micah

  2. #2
    Join Date
    Dec 2009
    Posts
    594

    Re: Torque needed for Pulsar servos

    I would sacrifice speed for torque in most cases, esp. as with short moves the table doesn't get up to max speed too often.

  3. #3
    Join Date
    Jan 2016
    Posts
    120

    Re: Torque needed for Pulsar servos

    Yeah I was hoping to find something with the same or more torque as the optional servos provide, but the motor frame size has been an issue.

  4. #4
    Join Date
    Jan 2005
    Posts
    15362

    Re: Torque needed for Pulsar servos

    Quote Originally Posted by burbingus View Post
    Hi guys,

    I'm still planning out some upgrades to my Pulsar. The servo option for the Pulsar has 1 kw XYZ axis motors that provide 4 Nm of torque (continuous). How much torque do you think these axes should have? I've been looking at various servos and drives, but most servos of a similar size provide just over 3 Nm of torque and a higher speed.

    Thanks!

    Micah
    1Kw is way to big for that machine a Haas Mini Mill only has 850w and that is way more machine than the Pulsar, may be the Z-axes at 1:1 may need a 1Kw but the X and Y axes 750w max, 750w are used on Bridgeport size machines
    Mactec54

  5. #5
    Join Date
    Jan 2016
    Posts
    120

    Re: Torque needed for Pulsar servos

    Thanks mactec, that helps me get my bearings on this a bit.

  6. #6
    Join Date
    Mar 2011
    Posts
    480

    Re: Torque needed for Pulsar servos

    I don't know the servo size on the Torus Pro, but it doesn't have a problem snapping off a 1/2" carbide end Mill ????

  7. #7
    Join Date
    Jan 2016
    Posts
    120

    Re: Torque needed for Pulsar servos

    It looks like the Torus Pro uses 1.2 kW servos in the same family as the Pulsar. They both make 4 Nm of torque, but the Torus version is faster, running at 3000 RPM where the Pulsar rated speed is 2500 RPM.

  8. #8
    Join Date
    Jan 2005
    Posts
    15362

    Re: Torque needed for Pulsar servos

    Quote Originally Posted by burbingus View Post
    It looks like the Torus Pro uses 1.2 kW servos in the same family as the Pulsar. They both make 4 Nm of torque, but the Torus version is faster, running at 3000 RPM where the Pulsar rated speed is 2500 RPM.
    If that is peak torque then they are very poor servo motors they are using, if it is rated torque they are way over sized, I could see that size on the Z axes but not the X and Y axes

    The DMM 750w has a peak torque of 7.2Nm and 2.4 Nm rated torque

    I would not be worried about the torque as all modern AC Servo motors all will have around the same torque spec's

    You need to be looking at Encoder count as well the higher the PPR the smoother your machine will run 16Bit Encoder is the minimum for mills

    DMM | AC Servo Motor | AC SERVO DRIVE | AC SERVO MOTOR | ROTARY ENCODER
    Mactec54

  9. #9
    Join Date
    Jan 2016
    Posts
    120

    Re: Torque needed for Pulsar servos

    Quote Originally Posted by mactec54 View Post
    If that is peak torque then they are very poor servo motors they are using, if it is rated torque they are way over sized, I could see that size on the Z axes but not the X and Y axes
    That's the continuous torque for those servos.

    Is a brake a good idea on these?

  10. #10
    Join Date
    Jan 2005
    Posts
    15362

    Re: Torque needed for Pulsar servos

    Quote Originally Posted by burbingus View Post
    That's the continuous torque for those servos.

    Is a brake a good idea on these?
    No you only ever have a Brake on a Zaxes and that can only activate when the power is shut down
    Mactec54

Similar Threads

  1. Pulsar - steppers or servos
    By burbingus in forum Novakon
    Replies: 9
    Last Post: 01-11-2016, 05:26 PM
  2. New Pulsar owner - Mach3 setup help needed
    By duvlitho in forum Novakon
    Replies: 12
    Last Post: 11-16-2015, 10:17 AM
  3. Replies: 2
    Last Post: 11-19-2005, 04:46 AM
  4. How much Torque is needed?
    By Tjippy in forum DIY CNC Router Table Machines
    Replies: 5
    Last Post: 12-02-2004, 09:56 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •