Force Sensor for CNC Machines
Close
Login to Your Account
Results 1 to 8 of 8
  1. #1
    Join Date
    Jul 2016
    Country
    UNITED STATES
    State/Province
    Ohio
    Posts
    32
    Post Thanks / Like
    Likes (Given)
    6
    Likes (Received)
    1

    Default Force Sensor for CNC Machines

    I have recently have been put in charge in figuring out how to run CNC machines without supervision. We have UR robots to do so but my concern is the breaking of inserts in my CNC lathes. We run mostly bronze and iron material so we get a lot of cast parts where we have issues of Porosity and cracks in the material. So my inserts could last 20 parts or could last 5 and break and when there is no operator around it will damage all the other tools in the remaining toolpaths. Is there a force sensor out there that i could install in the machine to monitor an increase in load that would E-Stop the machine or is there a better way?

  2. #2
    Join Date
    May 2019
    Country
    UNITED STATES
    State/Province
    Michigan
    Posts
    2,433
    Post Thanks / Like
    Likes (Given)
    1265
    Likes (Received)
    1798

  3. Likes Amanor, PegroProX440, PROBE liked this post
  4. #3
    Join Date
    Nov 2014
    Country
    UNITED STATES
    State/Province
    Florida
    Posts
    5,705
    Post Thanks / Like
    Likes (Given)
    2256
    Likes (Received)
    2836

    Default

    I would start by doing some monitoring to get an idea of good tool life in parts, bad life, and an average. If it really is that far all over (15 parts) you will definitely need something to stop the cut when it detects a sudden increase in load. If you can establish something you feel is safe, I think most machines have a tool life monitor in minutes/hours and you could set that and have a guy go inspect the insert when it stops.

  5. #4
    Join Date
    Dec 2014
    Country
    UNITED STATES
    State/Province
    Washington
    Posts
    260
    Post Thanks / Like
    Likes (Given)
    444
    Likes (Received)
    120

    Default

    What machine are you on? Many have tool load monitoring as well. I would think a significant spike from blowing an insert would alarm out.

  6. #5
    Join Date
    Dec 2003
    Country
    UNITED STATES
    State/Province
    Washington
    Posts
    5,026
    Post Thanks / Like
    Likes (Given)
    2605
    Likes (Received)
    4775

    Default

    the answer has everything to do with what kind of CNC controller you have - we have updated CNC's to monitor spindle load and axis load and automatically adjust feedrate override to compensate or call for a tool change if forces go up (or down) excessively.

    This was all done on the Sinumerik 840D platform on higher end large form factor 5-Axis mills.

  7. #6
    Join Date
    Feb 2017
    Country
    UNITED STATES
    State/Province
    Pennsylvania
    Posts
    124
    Post Thanks / Like
    Likes (Given)
    10
    Likes (Received)
    42

    Default

    Starting with poor quality raw material is going to make your life tough.
    I know it's not helping much with your question but I wonder how much more you would have to pay for consistently good quality castings?
    Even if you get the tool load monitor figured out someone will need to be waiting to swap out tips every time you hit a hard spot.

  8. #7
    Join Date
    Feb 2006
    Location
    Minneapolis
    Posts
    219
    Post Thanks / Like
    Likes (Given)
    9
    Likes (Received)
    28

    Default

    If they break away in big enough pieces you could just probe the tool after each cut. Wouldn't work so well for just wear though.

  9. #8
    Join Date
    Feb 2014
    Location
    FL
    Posts
    3,843
    Post Thanks / Like
    Likes (Given)
    12589
    Likes (Received)
    4550

    Default

    3PM Technologies: 3PM Technologies | Operating Unattended with Confidenece They have a product called the Machine Boss.

    Caron Engineering: Tool Monitoring Adaptive Control - TMAC - Caron Engineering They can do monitoring, and apparently can also integrate with the control to try to fix issues in real time. Haven't seen that part of their system.


Tags for this Thread

Bookmarks

Posting Permissions

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