The starting point is proper setup of the saw. And the first step is to choose the right blade for the job.
When cutting a profile, you need to match the width of the blade to the contour of the curve. In a nutshell, the narrower the blade, the tighter the radius it will cut. A blade that’s too wide may not allow for the turns necessary to follow a layout line.
For general use, a 1⁄4“-wide blade with 6 teeth per inch works well.
Setting the height of the blade guides correctly is the second component of the setup. The guides should be as close to the surface of the workpiece as possible without blocking your view of the layout line . This helps minimize blade vibration and deflection.