After a laser job, how long should you wait before opening the door of the machine?

Ten to 15 seconds should be adequate. It depends on the material and the exhaust volume. You always want to make sure that your exhaust is equivalent to the manufacturer’s specification, so that it’s drawing out the smoke. Typically, you shouldn’t have a problem if you have an exhaust that’s at the manufacturer’s specs. If you see smoke lingering on the inside of the machine after running a job, then you have an exhaust issue.


Mike Fruciano

Mike Fruciano

Mike Fruciano is the Distribution Sales Manager - The Americas 3D Printing & Laser Systems at Coherent Inc. Mike brings 25 years of laser systems, laser processing, and materials experience, and is a frequent writer and speaker on these topics. Contact Mike at 602-616-4971 or at

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