6 Way Probe Mod

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  • 6 Way Probe Mod

    Hi all,

    Couple of questions regrading the 6way star mods...

    1) I use TesastarMp_US modules. Would I be able to use a 6way TP20 on my machine? I am not seeing a 6way mod online that is specifically for Tesastar.

    2) What sort of accuracy are you seeing on these? (I am really hoping to be able to hold ±0.002 with this mod. Ideally I'd like to make a 20mm ext, a 5 way star, then a 1X10 sticking out of tip 3)
    Last edited by DAN_M; 12-11-2019, 04:24 PM.

  • #2
    how does a 6way work?


    • DAN_M
      DAN_M commented
      Editing a comment
      idk check it out

      The TP20 is a compact module changing touch-trigger probe. The two-piece design, comprising of a probe body and detachable stylus module(s), allows the use of a range of stylus configurations and extensions to access features on complex parts. Modules can be changed manually or automatically without the need for requalification of the stylus tip.The 6-way probe module is identified by a blue cap. This probe module is designed for 6-way operation where there is a requirement to measure in the –Z direction, for example when measuring undercuts.The recommended stylus limits for the 6-way probe module are:•Any stylus type up to 30 mm long•Star and cranked styli up to 10 mm offset

  • #3
    6 way is for a complete star probe. You can measure x-y-z- + and - from all 5 tips / directions. ( 1 probe at all the 90's and 1 facing straight down like standard probe )


    • #4
      Yes, Hexagon TesaStar's are interchangeable (rebranded renishaw) with TP20

      Renisaw TP20 data sheet: https://www.renishaw.com/en/tp20--6670
      Says the 6W is about 2x worse than standard force in repeatability (0.00004") and only 0.00004" worse in pretravel variation.

      I have an old spec sheet, with other data:

      TP20 probe technical data
      NOTE: For further information on the TP20 probe, refer to the TP20 system installation and user’s guide (Renishaw
      part number H-1000-5008), available through your supplier.
      NOTE: The following data is derived from high accuracy test rig measurements and may not represent the
      performance achievable on a CMM. Please consult you CMM supplier for overall system accuracy information.
      Performance at 10 mm stylus length
      (You'll have to CSV this or something to read it better, it's in a table that i can't paste. I BOLDED the 6W data)
      Probe module type
      Unidirectional repeatability* (2σ) 0.35 μm 0.35 μm 0.50 μm 0.65 μm 0.8 μm 0.35 μm 0.35 μm
      2D (XY) form measurement deviation* ±0.6 μm ±0.8 μm ±1.00 μm ±2.00 μm ±1.5 μm ±0.8 μm ±0.8 μm
      Measured at trigger speed of 8 mm/s.
      Test stylus ball Ø4 mm.
      Without extensively testing it, I presume your uncertainty of that probe module will be about 0.0001" worse than the uncertainty of a standard force module.


      • #5
        We use a 6way. StdDev on my normal A0B0 probes are about 0.001mm whereas my star probe is anywhere from 0.002mm to 0.003mm.
        Last edited by bfire85; 12-12-2019, 07:29 AM.
        Whatever a man sows, he shall reap.


        • #6
          Other star probes and builds can’t check under cuts or take hits in Z- as good unless it’s a 6 way?


          • louisd
            louisd commented
            Editing a comment
            That's correct. TP20's do not have the ability to open the circuit (detect a point) in Z-. If you are probing with a TP20 w/star probe on any other module, you are detecting the hit when the probe travels enough to open the circuit in X or Y, on the opposing side of the module from where you are taking the hit.

          • acgarcia
            acgarcia commented
            Editing a comment
            Thanks for the clarification. i'm going to have to think if I've done this before. I tend to use extended force modules so its a bummer that the max length of the 6 way is 30mm.

        • #7
          We run the TP20's exclusively and we use the 6 way mods for angle probes. Typical STD Deviation is .0001"-.0003" all day long.
          Remembering my beautiful wife Taz who's life was lost on 6-13-2020. I love you and I miss you.


          • #8

            I just got a 6 way probe. Set it all up. My machine won't get it from my rack =/ I have no idea why. Are you positive that I can use this?

            My usual setup: HH-A-T5, HA-TM-31, TesastarMP_Body_US
            What I built: HH-A-T5, HA-TM-31, Probe TP20_6Way, 20mm ext, 5way test star, 1X10 in tip 3

            I my new probe in the rack, told the rack it was in a port, when I tell PC DMIS to get the tool it wants me to hand load the probe


            • louisd
              louisd commented
              Editing a comment
              Did you assign the probe to the rack position?
              If so, and it didn't save...

              I came to the same roadblock when I tried to use a TP20 MCR20 rack to hold TP200 modules. It's Hexagon/Renishaw's ploy to mandate you to keep in-family components. Even though the TP200 physically docks/undocks with success on the MCR20, they essentially utilized this software-lock to force us to get PI200 racks.

              Create the 6-way probe as your normal TesastarMP_Body_US, and you should be fine. Unlike the TP20/TP200, your physical dimensions between the TesastarMP and the TP20 should be identical. The difference is internal to the module. There is nothing different between a TP20 SF and a TP20 6way, in regards to how the software considers the probe, but there might be a sw lock on using a TP20 on whatever branding the Tesastar Rack is.
              Last edited by louisd; 12-18-2019, 03:15 PM.

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