There are a few factors to consider when sharpening a woodturning tool. The first is the type of tool - most commonly, you will be working with either a gouge or a skewer. The second is the material you're working with - different woods require different angles. And finally, personal preference plays a role in finding the perfect angle for your needs.
For a gouge, the standard sharpening angle is 30 degrees. For a skewer, it's slightly higher at 35 degrees. But as always, it's best to experiment until you find what works best for you and the project you're working on.
Different woods also require different angles - softer woods like pine or fir can be sharpened at a lower angle, while harder woods like oak or maple need a higher angle to prevent tearing. Again, experiment until you find what gives you the best results.
Finally, personal preference comes into play when finding the perfect angle for your woodturning tools. Some people prefer a sharper edge for more precise work, while others go for a duller edge that's less likely to cause accidental cuts. Find what works best for you and stick with it!