Thanks for the answers so far.
Here we actually do stack the cut path 3 times. But 70% of the time it dosent go real well, often we need to cut alot of it out with a knife.
The flatbed thing we already figured, but the economy isent really that good to do that upgrade at this moment
We ahve thought of making somekind of table to make the vinyl go in and out flat.
The Sandblasterblade sounds really interesting. What exactly is the difference? at the moment we are using the 60 degree blade..
If your blade isn't fresh you'll have trouble with the thick stuff. A 60˚ blade is considered a sandblasting blade. At least with Summa it is. I stuck a 60˚ double sided blade in recently and it sure cuts nice. I can get through 6 mill with a 12 mil lam in 1 cut at less than 400 grams pressure, so you need to either change your blade or figure out why yours isn't getting it done with 3 cuts.
The tables to flatten out the vinyl's path should be your first priority though. It made the biggest difference with my set-up.
What settings are you using o the Summa?
I'm still trying to find a good mix of speed & downforce and getting the Flex-cut working.
I'm using a 75T