Hello! It's my first time using this instrument in the lab and I've got a problem.

When measuring, it gives an error, "Could not keep up with frame grabber. Retry or use a smaller acquisition mask".

I've already made the mask exactly the size of the shape I'm trying to measure so, that leaves me with only the other configurations to tinker with, but I'm not sure where to start.

In camera mode, I can't change the frequency, only the resolution. The livedisplays flickers a bit and that pattern shifts over time.

Help! AI Search haven't really been useful haha

Hey everyone,

I've been lurking here for a while and thought I'd ask for some advice from people with more experience in metrology and dimensional inspection.

I'm currently working as a Quality Inspector in the heavy-engine manufacturing industry in Norway, primarily involved in dimensional inspection, CMM work, first article inspection, non-conformance handling and quality documentation.

My background is mainly in machining. I've spent several years in manufacturing, including programming and machining complex 5-axis components in the oil and gas/subsea industry, working with super alloys. I also have a degree in computer science, so I'm comfortable with computers, software and technical problem-solving.

Moving into metrology has felt quite natural to me. I enjoy understanding the geometry, setting up measurements, interpreting GD&T and figuring out how to inspect a part properly. However, most of my knowledge has come from practical experience rather than formal education in metrology or quality engineering.

What I'm missing is formal training and a deeper understanding of the standards behind what we do.

For example:

• Which ISO GPS/GD&T standards should every dimensional inspector be familiar with?
• Where can I learn more about the correct measurement strategies for different geometrical characteristics, beyond what I've picked up on the job?
• How do you determine whether a measurement method is appropriate for a given tolerance? I'm particularly interested in measurement uncertainty, decision rules and proving conformity.
• Are there any good books, courses, technical papers or other resources you'd recommend for someone who already has a solid manufacturing background?
• What are some common mistakes or misconceptions you see even experienced CMM operators make?
• If you were starting out again, what would you study to become a genuinely competent metrologist rather than simply someone who knows how to run a CMM?

I currently work primarily with ZEISS CMMs and CALYPSO, but I'm interested in the underlying principles rather than just becoming more proficient with a particular software package.

I'm not necessarily looking for another certificate just to put on my CV. I want to understand the standards, make better inspection decisions, and be able to explain and justify why a particular measurement approach is correct.

If you work in metrology, dimensional inspection or quality engineering, what knowledge do you consider essential that isn't necessarily taught on the shop floor?

I'd appreciate any recommendations, resources or experiences you can share. Thanks!

I'm validating a reflectance imaging system for measurement work and could use input from people who do angular and dimensional setup for a living.

The setup:

A camera looks straight down at a sample stage (0°), with four strobes aimed at the sample from 45°. Reflectance is calibrated against Spectralon standards in the frame.

The problem:

Illumination varies with the cosine of the angle, so at 45° each degree of tilt shifts irradiance by about 1.7% (tan 45° × 0.01745). My target relative reflectance uncertainty is ≤1% at k=2, which means tilt alone has to stay within roughly ±0.5°. Distance matters too: by the inverse-square law, a 1% change in strobe distance gives about a 2% change in irradiance.

Current method:

I align the strobes with a Leica Disto X3. That reduced the angle deviations a lot, but my GUM budget still shows alignment as a major contributor. Right now I'm at about 5% uncertainty, against the 1% target.

Questions:

What would you use to verify angles at this level on a copy-stand-scale setup (about 1.27 m working distance, 1.75 m illumination source distance)? Precision inclinometer, autocollimator, angle blocks, something else?

How would you fixture the four strobes and the camera so the geometry is repeatable between sessions, rather than re-aligned each time? Kinematic mounts, dowel-pinned plates, hard stops?

How would you treat alignment in the uncertainty budget: as one combined angle term, or broken into separate tilt, rotation, and distance contributions for each strobe?

Happy to share the budget if it helps. Thanks!