I have a Vitrex 900 bridge saw, can't remember the name of the blade I'm currently using. I have a cutting platform made from a couple of granite tiles clamped to the top set at 5mm and the blade is fixed in position.
Then I have a stack of marble tiles 10mm and 12mm thick (all about 100mm - 150mm squares) that I feed these through cutting them into 5mm strips. I'll do about 40 - 50 tiles each session.
The saw is run for a maximum of 10 minutes before I rest it for a couple of minutes.
My question is, how do you judge when your blade needs changing? I've been cutting like this for a while and have been changing them when I feel the speed at which I can push the tiles through has slowed down too much but I want to get some other opinions so I'm not wasting blades.
There are some where I notice chipping on either side of the cut and but I'm using different types of marble, some cut perfectly and some I lose about 30% due to shattering so it doesn't give much of an indication.