Running a Laser Shop: Costs, Maintenance and Troubleshooting
Machine-hour cost and job pricing, consumables and tube life, cleaning and alignment schedules, and a troubleshooting table.
The machine-hour rate
To price work or to know whether the machine pays, add up everything it costs to run for an hour. The table builds the rate for the 80 W CO2 machine used through this guide (illustrative figures, 1 000 hours of cutting a year).
| Cost | Per machine hour |
|---|---|
| Depreciation (4 500 − 500) ÷ (5 y × 1 000 h) | $0.80 |
| Electricity (1.44 kW at $0.15/kWh) | $0.22 |
| Laser tube ($300 per 2 000 h) | $0.15 |
| Lens ($40 per 400 h) | $0.10 |
| Mirrors ($60 per 1 000 h) | $0.06 |
| Extraction filter ($120 per 500 h) | $0.24 |
| Coolant and small parts ($15 per 200 h) | $0.08 |
| Maintenance labor (52 h a year at $25) | $1.30 |
| Space, insurance, software ($1 200 a year) | $1.20 |
| Total per machine hour | $4.14 |
Worked example: what the rate says
- The rate comes to $4.14 per machine hour, or $0.07 per minute of laser time.
- The largest items are depreciation, maintenance labor and space: the fixed costs. They are paid whether the laser cuts or not.
- The consumables (tube, lens, mirrors, filter) add $0.63 per hour, matching the tube cost found in Machine Hardware: Optics, Motion and Cooling.
- The operator’s time is not in this rate: it is charged to the job (below).
Utilization: why hours matter
The fixed costs ($3 300 a year here) are spread over the hours that the laser actually cuts. A machine that cuts for a few hours a week is expensive per hour; a busy one is cheap.
| Cutting hours a year | Cost per machine hour |
|---|---|
| 250 h | $14.04 |
| 500 h | $7.44 |
| 1 000 h | $4.14 |
| 1 500 h | $3.04 |
| 2 000 h | $2.49 |
Worked example: the same machine, busy and idle
At 250 hours a year the rate is $14.04 per hour; at 2 000 hours it is $2.49, a 5.6 times difference with the same equipment. The cheapest way to cut costs is to keep the machine working: batch jobs, nest well, and avoid long idle setups. (The tube and optics wear with use, so the variable cost per hour does not change; only the fixed cost is spread.)
Pricing a job
Worked example: the 14-part sheet from the software page
- Machine time: 3.2 minutes (see Files, Software and Toolpaths) × $0.07 per minute = $0.22.
- Material: one $18.00 sheet.
- Operator: 6 minutes of loading, file checking and unloading at $30 an hour = $3.00.
- Cost of the job: $21.22 (material is 85 % of it).
- Price with a 40 % margin: $29.70, or $2.12 for each of the 14 parts against a cost of $1.52.
- Add design time, finishing (sanding, painting, assembly) and a minimum order charge, because a one-off job costs the same operator time as a batch. Material waste is already in the cost: the whole sheet is charged (see the yield figure in Files, Software and Toolpaths).
Maintenance schedule
| When | What | Why |
|---|---|---|
| Every day / shift | Empty the crumb tray; wipe the bed; check the water level and temperature; check the air assist and extraction run; inspect the lens for dirt | Fire risk; lens damage; cut quality |
| Every 40 hours | Clean the lens and mirrors (isopropyl alcohol and lens tissue, no pressure); check the nozzle and focus | Dirty optics lose power (see Machine Hardware: Optics, Motion and Cooling) |
| Weekly | Clean the rails and bearings and oil them lightly; check belt tension; clean the extraction duct and the filter | Smooth motion; ghosting; fume flow |
| Monthly | Check the alignment with tape marks; check the fasteners; check water hoses, fittings and the flow switch; test the interlocks and the emergency stop | Safety and cut position |
| Every 6 months | Replace the coolant (distilled water with inhibitor); clean the tank and pump; inspect the cables and the high-voltage connection (power off, discharged) | Algae, scale and shock hazard |
| As needed | Replace the lens, mirrors, nozzle, filters and belts when worn; replace the tube when the power has dropped | Consumables |
- Clean optics with care: use the right solvent (isopropyl alcohol or acetone for ZnSe lenses, as the maker says), lens tissue and light drag, never wipe dry. Gold-coated mirrors and ZnSe lenses are fragile and the dust is toxic.
- Set a schedule and tick it off on a sheet next to the machine.
- Keep spares: a lens, three mirrors, a nozzle, belts and fuses cost less than a stopped week.
Troubleshooting
| Symptom | Likely causes | What to check |
|---|---|---|
| The laser does not fire | Interlock open; water flow switch; emergency stop; supply fault; low enable signal | Lid and door switches; pump running and flow; E-stop reset; the controller’s alarm screen |
| Cuts weakly or not through | Dirty lens or mirrors; misaligned beam; wrong focus; power set too low; tube worn | Clean optics; check focus with a ramp test; mark with tape; read the tube current |
| Cut is wider and charred on the bottom | Out of focus; speed too slow; air assist low | Focus; raise the speed (see Power, Speed, Focus and Assist Gas); check the nozzle air |
| Part is the wrong size | Scale in the file; steps per mm; kerf offset | Cut a test square (see Files, Software and Toolpaths and Kerf, Accuracy and Designing Parts) |
| Wavy, doubled or shifted engraving | Loose belt; scan offset; acceleration too high | Belt tension; the bidirectional offset (see Engraving, Marking and Raster Work) |
| Job shifts partway through | Skipped steps; loose pulley set screw; EMI on the controller | Return to home and measure the error; tighten the grub screws; separate the laser and motor wiring |
| The cut is good on one side of the bed and weak on the other | Beam alignment through the travel | Alignment check at the near and far ends of the bed |
| The tube arcs or flickers | Poor connection; worn tube; moisture; supply fault | Switch off and inspect the connections (never touch live); suspect the tube if the discharge is uneven |
| Water temperature keeps rising | Low flow; blocked pipe; chiller fault; room too hot | Flow rate; filters; chiller (see Machine Hardware: Optics, Motion and Cooling) |
| Flames in the cut | Too much power or dwell; dirty bed; air assist off | Stop the job; fix the settings; see Laser Safety, Fire and Fumes |
| Smell or smoke in the room | Extraction not working; leaks; wrong material | Fan, duct and filter; seal the gaps; the materials list |
Worked example: what downtime costs
An eight-hour stoppage (a broken pump, a replaced tube) costs only about $33 in machine-hour charges that carry on, because the rate is low. The real loss is the jobs that are late and the customers who go elsewhere. A spare pump and a note of the supplier’s number cost far less than that.
Payback and buying a machine
Worked example: does it pay for itself?
- Each job like the one above leaves a profit of $8.49 after materials, labor and the machine-hour rate (the margin of 40 % of cost).
- At 20 jobs a week that is $170 a week. The $4 500 machine is paid back in 27 weeks (6.1 months) if the jobs are there. The depreciation in the rate means the machine is also being repaid inside the price, so treat this as a rough check: the real test is whether you can sell 20 jobs a week.
- Selling jobs, not buying hardware, decides the result. A machine that cuts for 100 hours a year never pays; one that is busy does.
- Before you buy: bed size for your biggest part, tube power for your thickest material (see Materials, Thickness and What a Laser Can Cut), enclosure and interlocks (see Laser Safety, Fire and Fumes), software and file support, spare parts and service, and room for cooling and extraction.
- Diode, CO2 or fiber? Diode for light engraving and thin cuts on a budget, CO2 for wood and acrylic work, fiber for metal (see Industrial Laser Cutting: Metals, Gas and Process).
- Consider outsourcing: a cutting service has the big machine; a few jobs a year do not justify your own.
Records and logs
- Hours meter: note the laser hours; schedule the tube, lens and filters by hours, not by guess.
- Settings library: save the tested power, speed and passes for each material and thickness (see Power, Speed, Focus and Assist Gas).
- Job log: the file, material, time and any problem, so that quotes improve.
- Incident log: every flame, near-miss or damage, with the cause and the fix.
Related
- Laser Cutting: the overview of this guide.
- Machine Hardware: Optics, Motion and Cooling: the parts that wear and how to align them.
- Laser Safety, Fire and Fumes: the rules for fire and fumes.
- Shop Tools and Workshop Safety.
FAQ
How do I set my price per hour?
Add depreciation, power, consumables, maintenance and space, divide by the hours you expect to cut, and add the operator’s time and a margin per job.
How often should I clean the lens?
Look at it every shift and clean it about every 40 hours of cutting, sooner when cutting resinous or oily materials.
How long does a CO2 tube last?
Typically 1 000 to 3 000 hours for a glass tube at full current; lower power and good cooling extend it.
Why did my machine suddenly cut weakly?
Check the optics first (dirt), then focus, alignment and the water flow, then the tube.
Is it worth buying a laser cutter?
Only if the jobs are there: the machine-hour rate falls quickly as the hours rise, and a busy machine pays back in months while an idle one never does.
References
- Laser tube and machine makers’ maintenance manuals.
- Cost accounting references for machine-hour rates (depreciation, overhead and utilization).
- ISO 9013 and the makers’ cut-quality guides for troubleshooting cut defects.
Last reviewed: October 2026. All prices, hours and rates are illustrative: use your own costs.