What Should a Laser Operator Check at the Start of Every Shift?
A good laser cutter daily checklist covers five areas before the first program runs: safety systems, the cutting head and optics, assist gas, cooling, and the table and motion system. Once an operator has done it a handful of times it becomes a short routine, and it catches most of the problems that otherwise show up halfway through a nest as dross, a burned protective window, a pierce that will not go through, or a head collision. The shops we see with the fewest emergency calls are not the ones with the newest machines. They are the ones where every operator checks the same things in the same order at the start of every shift. The checklist below is a starting point built from the service calls we get most often. Adjust it to your machine’s manual, post it at the control, and make it part of how every new operator is trained. Table of Contents Why a Laser Cutter Daily Checklist Matters Safety Systems Cutting Head and Optics Assist Gas Chiller and Cooling Tables, Slats, and Motion End of Shift Making the Checklist Stick Frequently Asked Questions Why a Laser Cutter Daily Checklist Matters Reger Laser services and supports fiber and CO2 cutting machines for fabrication shops across the country, and a lot of the repairs we do trace back to something that was visible at the start of the shift. A window with a spatter mark. A nozzle with a nick. A chiller running a few degrees warm. Gas pressure a little low because a bottle was near empty. Each of those is a two-minute fix before the first cut and a much bigger problem after a few hours of production. A daily checklist also makes a shop less dependent on one experienced operator. When the routine is written down, the second shift and the new hire check the same things the veteran does. That consistency is the whole point of the operator training we provide, and it is the foundation of any preventative maintenance program. Safety Systems Start with the things that protect people, because a machine that cuts perfectly with a bypassed interlock is not a machine anyone should run. Walk the machine and confirm guards, enclosure panels, and viewing windows are in place and undamaged. Test the emergency stops and confirm door and light curtain interlocks stop the machine. Confirm the fume extraction or dust collector is running and not alarming. Clear the area around the machine of scrap, tools, and anything that could trip someone or catch fire. Confirm a fire extinguisher is in its place and charged. OSHA’s guidance on machine guarding and its laser hazards overview are good references for why these checks matter. The laser beam in most cutting machines is infrared and invisible, so the enclosure and interlocks are what keep it where it belongs. Cutting Head and Optics The cutting head is where most daily problems start, and it is the area most worth a careful look. Protective window. Inspect it under good light for haze, pits, or burn marks, and replace it if you see any. Our guide to the laser protective window covers what to look for. Nozzle. Check the orifice for spatter, nicks, and roundness, and confirm it is seated tight. See our laser cutting nozzle guide for how damage shows up in the cut. Beam centering. Run a centering check if the machine or the nozzle has been changed or bumped. Height sensing. Calibrate the capacitive height sensor after a nozzle change, and confirm it responds. Focus. Confirm focus settings match the material in the first program. Assist Gas Assist gas problems look like cutting problems, so they are easy to misdiagnose. Checking supply before the first cut saves a lot of confusion later. Confirm there is enough oxygen, nitrogen, or air on hand for the shift’s jobs. Check that supply pressure at the regulator matches what the machine needs. Listen for leaks at fittings and hoses, and look for damaged lines. If the shop uses compressed air as an assist gas, drain the separators and confirm the dryer is working, because oil and water in the air end up on the optics. Our assist gas guide explains how each gas affects the cut and what purity and pressure problems look like on the part. Chiller and Cooling Confirm the chiller is running and holding its set temperature before the source is turned on. Check the coolant level and look for leaks under the chiller and along the lines. Confirm the condenser and filters are not clogged with dust. Note any chiller alarms, even ones that cleared on their own. A chiller that runs warm will not always stop the machine right away, but it shortens the life of the source and the optics. If the chiller is struggling, our post on why a laser chiller overheats walks through the usual causes. Tables, Slats, and Motion Look at the slats. Heavy slag buildup lifts sheets, causes tip-ups, and leads to collisions. Confirm the shuttle tables move freely and nothing is caught in the exchange path. Clear scrap from the bed and the conveyor or scrap bins. Home the machine and listen for new noises from the axes as it moves. Check the drive rails for debris that could reach bearings and racks. End of Shift The last five minutes of a shift set up the next one. Clean the head area, empty scrap bins, note anything unusual in a machine log, and report problems instead of leaving them for the next operator to discover. A shared log turns a vague complaint like “it has been cutting funny” into something a technician can actually diagnose. A good end-of-shift log does not need to be elaborate. Record the date, the operator, the materials cut, any alarms, any consumables changed, and anything that sounded, looked, or cut differently than usual. Over a few months that log becomes one of the most useful tools a technician has, because