Results 1 to 7 of 7

Thread: Inside groove diameter measuring skill

  1. #1

    Default Inside groove diameter measuring skill

    Hi Guru,

    Any suggestion on how to measure inside groove diameter accurately with CMM?

    I have a 90 degree knuckle to build a probe which can be used to measure it but i haven't never use it before. How to build the probe and calibrate it? Can we use the same calibration tool to calibrate it?

    BTW, I haven't tried to use star probe yet. Any suggestion on how to use and calibrate it? Thanks

  2. #2
    Senior Member
    • Additional Information
      • Years CMM Experience:
      • 30
      • Software Version:
      • PC-DMIS 2011
      • Machine Type:
      • B & S Performance 12-22-10 & B & S Advantage 15-40-10 with TesaStar-M
      • Location:
      • Miramar, Ca. Just minutes from the border
      • Job Function:
      • Chief Programmer
    johnP's Avatar
    Join Date
    Oct 2008
    Location
    Miramar, Ca. Just minutes from the border
    Posts
    360

    Default

    Have you done a search for this info? There's a lot to be found.

    I am fluent in three languages:
    English, Sarcasm & Profanity.

  3. #3
    Senior Member
    • Additional Information
      • Years CMM Experience:
      • 3 years with PCDMIS
      • Software Version:
      • CAD 2010 MR3
      • Machine Type:
      • Hexagon
      • Location:
      • Somerset, UK

    Join Date
    Apr 2010
    Location
    Somerset, UK
    Posts
    211

    Default

    The easiest way is to use a disc, which can then be used to measure a groove at any given probe head angle, it's relatively simple to calibrate and easy to program. With a star probe you have to tell the CMM which tip (modal) you are using to make contact with.

    I have rotated the probe head in the B axis with A fixed in two situations:
    i) With one stem of a star probe assembled, where the bore diamter is too small for a full star probe assembly to fit, where A was fixed at zero.
    ii) Where the bore diameter was large 6" and deep 7" and the probe head/column would have interfered with the top face, where A was fixed at 30 or thereabouts using an 80mm long ball stylus.

    What is the dia of bore, groove depth (radially) groove width, depth of groove, form of groove (sq/rad) as these determine what methods/tools you can actually use.
    Mnfctr: Hexagon,
    Model: Global B Perf,
    Hardware: Control FBII,
    Software: PcDmis CAD 2010MR3
    PH10MQ, TP20, Leitz equipped

  4. #4

    Default

    [QUOTE=johnP;334666]Have you done a search for this info? There's a lot to be found.[/QUOTE/]

    Any suggestion for getting a better search on this topic? Thanks,

  5. #5
    Senior Member
    • Additional Information
      • Years CMM Experience:
      • 1
      • Software Version:
      • 2010 MR3
      • Machine Type:
      • B&S Global Performance 5.7.5, FX 9.15.8
      • Location:
      • Southern California
      • Job Function:
      • Take the blame...
    ClayT's Avatar
    Join Date
    Jun 2011
    Location
    Southern California
    Posts
    319

    Default

    [QUOTE=homer.tan;334709]
    Quote Originally Posted by johnP View Post
    Have you done a search for this info? There's a lot to be found.[/QUOTE/]

    Any suggestion for getting a better search on this topic? Thanks,
    https://www.google.com/search?num=10...roove+diameter
    One screenshot is worth a thousand Need more info
    Never attribute to malice that which is adequately explained by stupidity...

  6. #6

    Default

    Quote Originally Posted by AlexA View Post
    The easiest way is to use a disc, which can then be used to measure a groove at any given probe head angle, it's relatively simple to calibrate and easy to program. With a star probe you have to tell the CMM which tip (modal) you are using to make contact with.

    I have rotated the probe head in the B axis with A fixed in two situations:
    i) With one stem of a star probe assembled, where the bore diamter is too small for a full star probe assembly to fit, where A was fixed at zero.
    ii) Where the bore diameter was large 6" and deep 7" and the probe head/column would have interfered with the top face, where A was fixed at 30 or thereabouts using an 80mm long ball stylus.

    What is the dia of bore, groove depth (radially) groove width, depth of groove, form of groove (sq/rad) as these determine what methods/tools you can actually use.
    Thank you, Alex,

    The groove is a cylinder inside a tube. The groove diameter is .912+0.002/-0.000, its outside cylinder(within the tube,I.D) diameter is 0.765+/-0.002;another groove is 1.037+0.002/-0.000, its outside cylinder(inside the tube,I.D) diameter is 0.906+/-0.002. the tube cylinder O.D is 3.210+-0.005.

    Groove width is about .140+/-0.02

    Please feel free to raise up your concerns and I'll try my best to answer your question,

    Thanks,

  7. #7
    Senior Member
    • Additional Information
      • Years CMM Experience:
      • 3 years with PCDMIS
      • Software Version:
      • CAD 2010 MR3
      • Machine Type:
      • Hexagon
      • Location:
      • Somerset, UK

    Join Date
    Apr 2010
    Location
    Somerset, UK
    Posts
    211

    Default

    You didn't say what the groove position is in the tube but I'd suggest this off the shelf stylus. Renishaw A-5000-3615 - 12.7dia 2.2mm thick, here's the probe file data for it that I recently created. The stylus is quite heavy so isn't suited for large extensions in the horizontal position but hopefully it may suit for you.

    ITEM:TIP12.7BY2.2MMDISK M3
    comment A-5000-3615
    begintip
    ribcount 10
    color 142 142 142
    cylinder 0 0 0 0 0 -4 4
    cone 0 0 -4 4 0 0 -7 3.5
    cylinder 0 0 -7 0 0 -28.5 3.5
    cylinder 0 0 -28.5 0 0 -30 6
    cylinder 0 0 -30 0 0 -32 12.7
    hotspot 0 0 -31 0 0 1 12.7 2.2 disk
    endtip
    Mnfctr: Hexagon,
    Model: Global B Perf,
    Hardware: Control FBII,
    Software: PcDmis CAD 2010MR3
    PH10MQ, TP20, Leitz equipped

Similar Threads

  1. Measuring Form and Diameter
    By Juan Olmedo in forum PC-DMIS for CMMs
    Replies: 3
    Last Post: 02-24-2010, 05:38 PM
  2. measuring a diameter on a cone
    By Joe Arnold in forum PC-DMIS for CMMs
    Replies: 4
    Last Post: 10-22-2007, 02:19 PM
  3. measuring diameters on Diameter
    By Zamlight in forum PC-DMIS for CMMs
    Replies: 5
    Last Post: 02-21-2007, 10:42 AM
  4. Replies: 1
    Last Post: 12-04-2006, 07:44 AM
  5. Measuring hole size (diameter)
    By JohnCTB in forum PC-DMIS for CMMs
    Replies: 14
    Last Post: 05-22-2006, 05:55 AM

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
  •