CNC Machine Safety
Having had a couple of run-ins with CNC machines myself, albeit only one of them involving harm to me, I'm inherently aware of the dangers involved when operating large, complicated collections of semi-autonomous machinery. Granted, the time I accidentally picked up a lumb of searing hot machined aluminium couldn't have been solved by an emergency stop button!
What can be stopped, however, are unfortunate incidents involving either the machine damaging itself, I once sent the tool of a CNC milling machine through the block of aluminium I was machining, or to people/clothing.
RS Components have put together a handy infographic about CNC machine safety. Targeting the hobbyist market where all bets are off when it comes to safety standards, RS emphasize the importants of guards, keeping your work area clean and more.
This is all sensible stuff!