The Week That Should Have Been Quiet
It was the Tuesday before Thanksgiving 2023. I walked into the QC lab with a coffee I didn't end up drinking. Our lead inspector pointed at the dial indicators on the fixture bench. "These are reading about three tenths off from this morning," he said. "I don't trust them."
That was supposed to be a quiet week. It wasn't.
I'm a quality lab coordinator at a precision machining shop. For six years, I've scheduled calibration, ordered instruments, and handled support requests for roughly 40 measurement devices. I'm not a metrology engineer, so I can't speak to the physics of every sensor. What I can tell you from a coordinator's perspective is this: the costly mistakes aren't usually the technical ones. They're the ones where you ignore the obvious until it hits your budget.
That same week, our annual Hexagon CMM calibration was scheduled for the following Tuesday. The machine had been running fine, but a calibration isn't something you skip. Or reschedule casually.
Three Things I Ignored
On Monday, I needed to confirm the calibration appointment and pull the machine's service history. That meant logging into the Hexagon support portal. I had the URL. I had an account. I didn't have the password. I'd reset it once in 2021, then let my browser remember it. When the browser forgot, I saw the "Hexagon support login" screen, figured "later," and closed the tab.
Instead, I emailed our regional contact and waited. That was the first mistake.
The second mistake was the Centrifuge 5424R in the sample prep room. It started throwing an imbalance code on almost every run. I'm not a service technician, but it's a small benchtop centrifuge, so I figured I could handle it. I checked the tubes. I rebalanced them. I cleaned the rotor. Same error. All the while, the dial indicators stayed on my desk with a red tag.
Here's something vendors won't tell you: "imbalance" on a small centrifuge is often not about your tubes. Ours was a cracked shock mount—probably broken when someone bumped the unit. I didn't know that because I didn't consult the manual until much later.
The third mistake? I knew the service contract required a pre-calibration check. I kept telling myself I wasn't gonna need the portal until the next annual cycle. That was wrong.
The Thermal Camera Moment
Wednesday afternoon, the CMM's control cabinet fan began grinding. It sounded like a deck of cards flipping. I knew the cabinet needed airflow, but I wasn't sure if I was allowed to open it. The service engineer was due in six days. If the cabinet overheated, the Hexagon CMM calibration would be worthless—thermal drift would ruin any baseline measurements.
That's when I grabbed the FLIR One thermal camera from our maintenance drawer. The manual was missing, so I searched "how to use FLIR One thermal camera" at 11 p.m. The official startup guide taught me to set emissivity, focus the image, and capture a snapshot. I scanned the cabinet. One fan was at 81°C. The other was at 48°C. The hot one was dead.
Look, I'm not saying a thermal camera replaces a maintenance schedule. It's not. But that late-night scan probably prevented a bigger failure. It also exposed the real problem: I didn't know there was a known issue with that fan because I never got into the Hexagon support portal.
When I finally recovered my password on Friday night—after the emergency service call was already arranged—I found a service bulletin for the fan kit. It had a part number. It had a replacement procedure. If I'd logged in on Monday, I could have ordered the kit and had it by Wednesday. Instead, I paid a local automation tech to rig a temporary fan, and then rescheduled the calibration anyway because the cabinet had been opened by someone who wasn't on Hexagon's approved service list.
And the dial indicators? They weren't a CMM problem. They were worn from years of use and needed to be sent out for recalibration. I knew that in October. I just didn't want to be down a set for three weeks, so I left them in service. That decision cost me $450 in expedited fees and made me look like someone who couldn't read obvious red flags.
The Centrifuge 5424R was the one bright spot. When I finally stopped guessing, I called the lab equipment vendor, ordered the shock mount, and the unit ran fine by the next week. The part cost $180. The lesson was the same: read the manual before you touch the machine.
What the Post-Mortem Taught Me
In total, that week cost about $2,800 in wasted budget. That included the emergency service trip, the temporary fan, the rescheduled Hexagon CMM calibration premium, and the expedited dial indicator calibration. It didn't include the credibility I lost with my team.
It's tempting to think that if you have a calibration contract, the vendor handles everything. That advice ignores the reality that the machine's condition on the day of the visit determines whether the visit succeeds. I wasn't prepared because I couldn't access the one system that had all the answers.
Honestly, I was sort of proud of the thermal camera work. In hindsight, it was a band-aid. It didn't fix the underlying process failure.
What I'd do differently is painfully simple. I'd spend 20 minutes on Monday morning to reset that "Hexagon support login" and make the portal part of the workflow. The portal had the service bulletin. It had the part number. It had the calibration checklists. All the information I needed was already there—I just couldn't get in.
There's a broader point for anyone who runs measurement equipment. A proper Hexagon CMM calibration is usually accepted under ISO 10360-2, and the machine has to be stable and serviceable before the engineer arrives. The procedure starts with the service history and environmental checks, not with the operator's smile. As of January 2025, that's still the standard I plan around. Check the official support portal for current requirements, because documents do get updated.
"The value of a guaranteed calibration date isn't the speed—it's the certainty."
I didn't need a faster method. I needed a frictionless way to access the correct information.
The Checklist I Use Now
Since then, I've built a pre-maintenance checklist. It's not fancy. Four items:
- Can I log into every support portal? If not, fix that before the due date.
- Did I download the latest service bulletins for the instrument?
- Do I have the manual open before troubleshooting? Not after.
- If I'm not trained to repair it, stop and tag it.
I also made the Hexagon support login a saved password in our team password manager, not in someone's personal browser. The login is the door. If you can't get through the door, you can't do the other maintenance steps.
My experience is based on about 40 calibration cycles and a handful of panic-fixes. If you're in a larger facility with a full metrology team, your mileage will be different. But I suspect the failure pattern is the same: the portal you avoid is usually the portal that has the answer.
