For good straight line cutting,
First draw proper layout using good geometrical scale.
Second one has to hold rigid the piece of wood or acrylic so that it should not move or shack while you are cutting. In my case I tighten the acrylic sheet into my table vice.
Use fine teeth blade for cutting acrylic, now put the blade over the cut line Start cutting slowly while making an 60 degree or less angle between blade and the cutting surface. Make sure blade is flowing the layout line with each movement..
**Different type of blades are used for different type of substance. **
Keep you speed very slow..
Result will be a good straight line cutting,
In the end I will add “Practice makes a man perfect.â€
Regards
Rakesh Sharma