Some dirtbikes have an hour meter, some have an odometer, and some have both. I always prefer to be able to see both: not just how long it ran, but how hard it was run. 1hr and 5 miles from a light user is a huge difference in wear & tear from 1hr and 50 miles from a pro racer. I feel like that could apply to light/heavy laser use as well.
I think it would be hard to keep track of if you measured working hours at every power output setting. And itās in Glowforges best interest to give more general information to help stop people from comparing their laser lifespan.
Hours Cutting and Hours Engraving should be enough, as they use very different processes to do both, it wouldnāt be too hard to track both.
In theory, I believe, each cut-file that gets sent to Glowforge should have all that (estimated) data in it already. So the algorithm to (eventually) calculate remaining laser tube expectancy would (maybe) compare cutting/engraving time@speed/power/cooling levels. 'Dem algy rythyms are powerful smart.
@dan silly thought, actual mileage counter! For drive belts(canāt remember if it uses belts or gears or whatever) and motor. Eg. How much they have rotated. Donāt know what these electric motors are rated for but for the long run health of our mechanical parts this would be helpful.
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I have a projector. It listed a life expectancy on the bulb ofā¦I dunno, 2000 hours. After a long bit of use(a secondary monitor for watching movies in the parents basement(itās been a while since Iāve used it-itās spent the last two years at my church and occasionally lent out to Carnival for Autism as the founder is a friend(who recently registered it as a 401 3c [tax paying] non-profit))), it started giving me warnings about bulb life. I researched a new bulb and figured Iād buy it as soon as the bulb went. and waitedā¦ and waitedā¦ and waited. I think my church finally bought a bulb for it after a number of uses there and the original still hadnāt blown though it was obvious to me before I unofficially donate it that it was much diminished in brightness.
I imagine the same for any bulb type tool. It may slowly fade away into the sunset like the nameless cowboy at the end of the movie or it could end like a Micheal Bay movie and leave you blind and deaf.
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Thatās a reminder of good perspective on consumables or life expectancy. I remember paying much more that what I paid for a Glowforge for a digital projector. The sticker shock when I had to replace a bulb made me think that I should just be satisfied with a zoetrope. And it was just a bulb, not a laser and when I was done watching, nothing was created.
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@marmak3261, I remember researching a big screen projector, and realized I could buy mid sized color TV for what the projector bulb cost!
In an aircraft, every component has a āhigh timeā for replacement, based on hours or cycles.
A general expectation for our laser is 2years for average use.
Itās going to be a couple of years before a service life profile can be established for our custom tubes. The laser is the major consumable, but is only one component in the system.
The preview dialog shows time required to complete the file, so it would seem an easy enough task to keep a cumulative record of total time each machine has experienced.
Although the laser is only firing a portion of the total āprintā time, the cumulative time in operation will also reflect the service life of every other component in the system.
Just as a means of gathering operational and reliability statistics, (that will prove valuable to Glowforge) I think keeping a time record of sorts is an excellent idea.
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@dan - Is the tube lifetime mostly based on calendar time or in-use time? E.g. is it a 700-day tube or a 700-hour tube?
My old glass tube HeNe laser from 1980 still works FWIW. It never could cut anything of course - it was just good for aggravating the cat. 
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There is a shelf life that is yet unannounced. For actual use:
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Welcome! Glad you joined us. 
Enjoy the reading, there is a lot to be found here and the search function is really good.
What is the power on that old laser?
Iād have to take it out of its enclosure, I think 100mW. Seems like the shelf life on these things can be pretty long - assuming the state of technology hasnāt gone backwards over the past 37 years.
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Welcome to the forum. Thanks for jumping right in with a post!