Are laser cutters safe to use in schools and universities?

Question

Accepted Answer

Yes, for the right configuration.

Yes, for the right configuration. A commercially built, fully enclosed laser cutter, used as designed with its enclosure, window and interlock intact, can be used safely in a school or university. One university states these devices are safe when used as designed without manipulating the safety features, and the ANSI standard for education is written for faculty and students using lasers at primary, secondary and college levels. What the answer to are laser cutters safe in schools covers, and what a low class does not Two side-by-side panels and a strip below. The left panel, covered by this answer, lists an enclosed machine whose label says Class 1 or Class 2 in the configuration you run, with enclosure, window and interlock intact. The right panel, not covered, lists open-frame or open-bed machines, pass-through or conversion kits, anything labeled Class 3B or 4, and unknown class; these need a laser safety officer and a written laser safety program first, and if none can be designated the answer is not yet. The strip below says a low class covers the beam only, so fire, fumes, electrical hazards and moving parts remain, and the school controls are a hazard review before purchase, training before first use, and an authorized person watching every job. Covered by this answer an enclosed machine label says Class 1 or Class 2 in the configuration you run enclosure, window and interlock intact Not covered here open-frame or open-bed machines pass-through or conversion kit labeled Class 3B or 4 class unknown First: a laser safety officer and a written laser safety program. No officer: the answer is not yet. A low class covers the beam only Fire, fumes, electrical hazards and moving parts remain. The school controls: hazard review before purchase training before first use an authorized person watching every job A low class covers the beam, not the room. Enclosed does not automatically mean Class 1, so read the label for your exact product and configuration. Any flame means stop. That answer covers an enclosed machine whose label says Class 1 or Class 2 in the configuration you actually run. Open-frame or open-bed machines, machines with a pass-through or conversion kit, anything labeled Class 3B or 4, and any machine whose class you do not know are not covered. They need a laser safety officer and a written laser safety program first, and if your school cannot designate one, the answer is not yet. Do not assume enclosed means Class 1: read the label for the exact product and configuration. MIT says most, but not all, cutters are sold as Class 1, and one university treats a cutter as Class 4 when the interlock is bypassed or pass-through slots are needed. A low class covers the beam only. The exemption applies to emitted laser radiation, not to other hazards, so fire, fumes, electrical hazards and moving parts remain, and that is where a school’s controls belong: a hazard review before purchase, training before first use, and an authorized person watching every job. Any flame means stop. Use the emergency stop or the switch you were trained to use, do not open the lid to look, move students away, then follow your school’s written fire and evacuation procedure. Opening the enclosure or working inside the machine is for authorized service only.

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