What type of water to use with a laser cutter.

Never use tap water in your laser cutter it will cause problems for the laser tube.

Based off our research you shouldn't use anything other than distilled water. It looks like plane distilled water is the best thing to use at the moment. We are currently conducting new research into additives to help improve the cleanliness of the water over its lifetime.

An interesting side note. It looks the more conductivity the water carries the worse it is for your machine. 

Maximum and minimum settings

Recently I've been working on maxing out the efficiency of my machine and I've come to some very interesting conclusions.

1. Never cut above 75%. I've even heard arguments to never go above 65% as you did as you're not getting that much extra power but you are wearing out your machine significantly faster.

2. With machines up to 100 W there is no point cutting above 175 mm/s. for the most part you don't want to go that fast anyways because the quality is terrible due to the high-speed. I found on my own machine that anything above that basically produced almost no gains.

3. Most machines won't fire below fourteen 14%.

4. don't engrave above 350 mm/s as the results are very bad.

Laser tube lifespan

I get a lot of questions from people about this very topic so here are a few good things to know.

The average laser tube is only rated for a shelf life of two years. I've seen many units that are significantly older than that and still functioning and there's a very good reason for that.

Laser tubes hate air. What we call a co2 laser isn't necessarily just carbon dioxide. Depending on your manufacturer and model there could be other stabilizers in there to help increase the lifespan of the tube and the air not one of them. Oxygen slowly seeps in through microscopic gaps in parts of the laser tube which diminishes its ability to produce a laser. Even if it's perfectly sealed the base operation of how laser works changes the chemistry of the laser tube over its lifespan which is what essentially kills it.

Don't buy an extra tube. Even sitting on the shelf these things are taking down and there are plenty of American and Chinese suppliers they can provide you with a new laser tube fairly quickly.