measurement (general)

  1. S

    Measurement Terms - How do I say this in Inches?

    Hi everyone, I'm new here Could someone tell me how I would say the below in Inches .000085" (Is this eighty five millionths?) .00012" (Is this one tenth and 2 millionths?) Thanks with any help on this Stan
  2. I

    Flatness - Rectangular part using the three jack method

    I have always used the three screw method of flatness measurement. I encountered a rectangular part which using the three jack method displayed a flatness .105. Upon attempting to reject this as it was grossly OOT, I received instruction to try a different method which seemed like a problem...
  3. apestate

    Inexpensive Gage Blocks for small aerospace startup shop

    Hello all I am wondering if anyone knows of options for getting a set of gage blocks with an accredited calibration cheaply. Many years ago, I was able to get a Shars AS-1 81pc gage block set that was already calibrated by an A2LA, 17025 lab. I can't remember if we drop shipped the set to...
  4. G

    Uncertainty of staging a short line scale standard on longer measuring machine?

    I have a measuring machine that measures up to 1000mm in length, but my traceable standard is only 400mm long. When I calibrate I align the standard parallel , start at the left side and measure every 10mm to check for accuracy deviations. I then move the scale to the right, overlapping approx...
  5. S

    Requirements for Interval Measurement test & Frequency Response test clarification

    Dear all, In the "Requirements of Interval Measurements Test" in IEC 60601-2-25. The table 201.104 contains PQ-interval measurement. However, In the Reference measurement values of individual CAL waveforms. The PQ-interval is absent and PR interval has been provided. Is it a typo error in...
  6. G

    Gear Profile & Lead Report

    Help needed. Got a gear report from a customer showing profile and lead(report attached). Its AGMA 2000, on the result sheet its showing Vphi(profile & Vpsi)Lead. Is this Total profile(Fa) & Lead(Fb). Not seen this before, any help appreciated. .
  7. U

    Measuring a Golf Club Face/Grip/Shaft Rotation

    is there any small device that could measure club face/grip/shaft rotation of the golfclub? needs to be able to measure at high speed
  8. P

    Romer Arm - Profile of a Surface Changing

    Hello, Thanks for all future help with this question. I have a Romer Arm and I am using Polyworks as my inspection software. The problem I am getting is after I scan the entire part and start to get my dimensions... I got my Profile of a Surface of 1 edge...And it is at about 3mm. I then got...
  9. P

    True Position vs X and Y Dimensions

    Hello All, This is my first post on Elsmar so please bare with me. I am measuring a part using my Romer Arm and Polyworks. The problem I am getting is the the X dimension is in tolerance (Basic), the Y dimension is in tolerance (Basic), but then the true position is 14mm out of tolerance. I...
  10. D

    Can a Mill be used as a CMM?

    Good afternoon, I have a question that may be a bit silly. Can a mill (machining operation) be used to (1) make a part and (2) inspect / certify the part? I am not as familiar with the whole machining and V&V discussion, but I'm used to the "make a part on machine X and test the part...
  11. M

    Methods of reducing/eliminating the systematic component of error

    Hello everyone! Tell me please, what methods of reducing / eliminating the systematic component of error of measuring instruments. As I know, some of them - the use of feedback (inverse transformation), exemplary measures (exemplary signals). Can someone already use these methods when...
  12. M

    Effectiveness Measuring and Efficiency Measuring In ISO 9001:2015

    Our auditor told us to include these 2 assessments into our ISO practices. Any tips?
  13. O

    What does "Gap" and "Flush" in ASME Y14.5 mean?

    Hello Guys, I have seen a lot of times the terms "GAP and FLUSH" in GD&T drawings, but I have been looking for that terminology in the ASME Y14.5 Standard and I have not found anything. Do you know what is the meaning of these two terms? Thanks in advance, Regards.
  14. Q

    Difference between Monitor & Measurement

    Hello Members Just a basic question. What is the difference between Monitor and Measure ? We regularly use terms like monitoring & measurement of processe, monitoring frequency, measuring frequency etc.. What is the best example to understand the basic difference between these terms? Thanks
  15. M

    Dimensioning diameters

    Hello, I have a doubt about dimensioning diameters,what is the correct way to measure a diameter (method,instrument,etc.) and where can i get that info,i hope you can help me ,thanks !!!
  16. optomist1

    Recommend Primer Details of Non-Contact White/Blue Light Scanning

    Hi All, Can anyone recommend a good detailed text of White/Blue light scanning as a metrology alternative to conventional CMMs, etc?? Thanks, Optomist1
  17. T

    Tape Measure, the right device for 2 or 3 decimals accuracy on prints

    Hello, I am struggling finding answers to my concern with Tape Measures. I learned that if a Tape Measure is used to verify parts it needs to be calibrated. So far so good... Now, on the other hand I learned that a Measurement system should be 10x more accurate than the print states. For...
  18. L

    Radius Measuring Tools

    Currently, I am working on a problem that involves my machine shop not forming metal corners within tolerance. I've been looking for a radius gauge that will measure between 2" and 8". I have found some that start at 2.5" but, my measurements start around 2.6" +/- .050 and go to 7" +/- 0.050...
  19. O

    Datum A and B are both Cylinders (GD&T)

    I have a question that is just killing me. hopefully you guys can help me. I have a bent tube and my Datums A and B are both cylinders. they are one at the end of the pipe, and one at the other end of the pipe. I can not figure out wich of these axes creates a plane and in what direction. I...
  20. S

    Opinions on the "Best" CMM for High Accuracy Machining

    I'm looking for opinions on the "best" CMM for high accuracy machining. I have features with tolerances of .010mm to as small as .005mm. GD&T, complex geometry, medium size 140mm long x 75mm diameter to small 6mm long x 2.5mm diameter. I have a controlled and fairly stable 24 hr temperature...
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