Why Keys Keep Stripping On My Bench I have lost count of the small servomotor shafts I have seen chewed up by a keyway that was simply too shallow for the job. A colleague once…
The first machine I ever commissioned died of its cables at eleven months old. The axis moved fine, the bearings were fine, and the customer was impressed. Then one night the Y-axis cable frayed inside…
There is a moment every designer knows. You open the master assembly of the machine you have been building for three months, the status bar crawls, and when the model finally appears, rotating it feels…
Ask five automation sales engineers which concept to use and you will get five answers, each one attached to a product they happen to sell. Ask a machine designer who has installed all five and…
I once watched a single changed hole swallow an entire production week. A colleague — in a hurry, on a Friday — enlarged a hole on a mounting bracket from 10 to 12 mm in…
The first time a customer complained about noise, I defended the machine with data. The sound level was 82 dB(A) at one metre, and the specification said 85 was fine. Technically I was right, and…
Nobody gives you a medal for a clean STEP file, and yet I have spent more hours of my career wrestling with broken ones than on almost anything else. The pattern is always the same….
My first attempt at a design standards system was a fifty-page manual that nobody read, nobody quoted, and nobody ever cited when I asked about a drawing. It was technically excellent. It covered tolerancing philosophy,…
My first topology optimization run was a triumph on screen and a disaster on the shop floor. I had a 4.2 kg bracket, and the solver happily carved it down to 2.3 kg with a…
Somewhere in the middle of my second year as a CAD administrator I built a folder called Templates that contained 340 part files. Three hundred and forty. I did it with the best intentions —…
Why I stopped trusting “just make it H7” I’ve been specifying fits on rotating assemblies for close to twenty years, and the thing that still surprises me is how fast smart engineers reach for H7…
1. Listening to the Machine Every structure has a voice, the set of frequencies at which it rings when it is struck, and the engineer who understands that voice can fix a vibrating machine, isolate…
1. Two Ways to Turn the Corner Machinery rarely aligns its shafts in a straight line, and the drive that connects a crossed pair of shafts, one turning the other at ninety degrees, is one…
1. The Air That Works Pneumatics moves the world’s lightest load with the world’s most available medium: compressed air. A pneumatic system takes the atmospheric air, compresses it in a central compressor station, stores it…
1. The Cylinder That Carries the Load The hydraulic cylinder is the muscle of the machine: it turns the pressure of the hydraulic fluid into a straight-line force and a controlled motion, pushing a press…
