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Safety

  • in Safety
  • 5 min read

No Proof, No Resume: a machine may pause the beam, but it has to earn its way back

It is two in the morning and a fifteen-hundred-projection scan is half done when the storage ring drops its beam. Nobody is in the control room. On most setups one of two bad things happens: the acquisition grinds on, writing hundreds of dark, useless frames, or it sits there, technically running, until someone arrives at eight and finds the night wasted. What you want is the obvious human thing: pause when the beam goes, pick back up when it returns. What you do not want is a machine that picks back up at the wrong moment. CORA now does the first, automatically, precisely because it refuses to do the second.

  • in Safety
  • 7 min read

The Banner That Warns But Never Blocks: tribal knowledge that reaches the console without standing in the way

Every beamline runs on a second body of knowledge that never made it into a manual. The Aerotech rotary stage at 2-BM misses its index pulse on the first home after a power cycle, so you home it, wait five seconds, and home it again. After the hexapod controller reboots, every axis comes back correctly except Y, whose dial resets to zero while the encoder still reads 350, and if you command a Y move before fixing it by hand you earn a drive error and another reboot. None of this is a fault. None of it is in the vendor documentation. It is the stuff the last shift learned the hard way, and it usually lives in a sticky note on a monitor, a thread in a chat channel, or the head of whoever happens to be on shift. Which means that on the night the right person is not on shift, it does not exist at all.

  • in Safety
  • 8 min read

No Clearance, No Beam: what it means for a record to be able to say no

The operator has done everything right. The sample is mounted, the recipe ladder is defined, the beam is up, and the scan is one keystroke away. They press start, and the system says no. Not a yellow banner they can click past, not a checkbox to acknowledge and move on: a flat refusal, because the safety form covering this particular sample has not yet been activated. A few minutes later a reviewer walks the form through its last approval, the operator presses the very same start again, and this time it runs cleanly, with no edits and no workaround. Nothing about the experiment changed. What changed is that the paperwork became real, and the system was watching for exactly that.