What motor, screw and gearing should I choose? v1.2


Results 1 to 4 of 4

Thread: What motor, screw and gearing should I choose? v1.2

  1. #1
    Registered
    Join Date
    Oct 2003
    Location
    Sweden
    Posts
    399
    Downloads
    0
    Uploads
    0

    Default What motor, screw and gearing should I choose? v1.2

    The short answer:

    For a smaller wood and plastic cutting machine (and maybe – maybe! – some light aluminum), several people on CNCzone seems to have had success with 100-200 oz-in (0.7-1.4 Nm) stepper motors direct driving a 5 turns/inch (5 mm lead) ACME (trapezoidal) screw.


    The long answer:

    ... hopefully you can find in the attached file. Please, if you spot any errors or have trouble viewing the file (like missing characters or fonts), write a comment in this thread: http://cnczone.com/forums/showthread.php?t=5639, or use the email address in the file to notify me. Other comments are also welcome to my email address.

    Arvid

    Similar Threads:
    Attached Thumbnails Attached Thumbnails What motor, screw and gearing should I choose? v1.2-cncmechanics-v1-2-pdf  


  2. #2
    Registered
    Join Date
    Jun 2004
    Location
    Scotland
    Posts
    264
    Downloads
    0
    Uploads
    0

    Default

    I've made up an Excel Spreadsheet based on Arvid's excellent PDF file.

    The spreadsheet let's you enter values for Motor Torque & Speed, Drive Ratio & Effiency, Screw Pitch & Effiency, Cutting Force (plus any additional weight), plus Desired Speed. Most of these measurements can be entered in Imperial or Metric units, and will be automatically converted to SI units.

    It will then show results for Desired Screw Speed, Actual Screw Speed, Actual Screw Torque, Required Screw Torque, Desired Drive Ratio (Speed or Torque based), Actual Movement Speed, Actual Movement Force, and Required Motor torque, depending on what values have been entered.

    Usage - Enter your known and/or desired values into the relevant pale yellow cells (ie Motor Torque in Nm, enter it in the yellow box with Nm in the column before it, or if oz-in, the yellow box with oz-in in the column before). The relevant SI value will then be displayed in the blue box in the next column, and the red text will tell you what value the SI value is based on.
    Once enough values have been entered, the blue boxes at the bottom will change from NED (Not Enough Detail) to the calculated figure.

    None of the cells have been locked or protected, so be careful that you don't accidentally delete any of the equations.

    Note - The drive effiency isn't covered in Arvid's PDF, but it allows for any ineffiency in the drive system. If the drive is direct (ie motor coupled direct to end of screw), then enter 100%.

    Attached Files Attached Files


  3. #3
    Registered
    Join Date
    Apr 2014
    Posts
    0
    Downloads
    0
    Uploads
    0

    Default Re: What motor, screw and gearing should I choose? v1.2

    I'm a bit amazed that no-one has done this yet, given how useful it is.... so... THANKS TO YOU BOTH!!



  4. #4
    Registered
    Join Date
    Mar 2015
    Posts
    0
    Downloads
    0
    Uploads
    0

    Default Re: What motor, screw and gearing should I choose? v1.2

    Awesome, I will definitely try this out. Thanks



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
  •  


About CNCzone.com

    We are the largest and most active discussion forum for manufacturing industry. The site is 100% free to join and use, so join today!

Follow us on


Our Brands

What motor, screw and gearing should I choose? v1.2
What motor, screw and gearing should I choose? v1.2