I have the Bosch 4000 TS, my main saw. It came out of the box straight and true 6 years ago, but then the fence went out of alignment, a common problem. Another website had this technique:
1. raise blade all the way (saw unplugged of course)
2. loosen set screws (2) on top of fence
3. align fence to blade.
4. tightens set screws
5. re-check for parallel
6. clean and wax all sliding parts between fence and table
7. sand all “burs or scratches on table top (soft aluminum)
Hope this helps. I like the Bosch, but still dreamin’ about a real cabinet saw.