Is support really needed?
How can I know when support is not necessary?
It depends on the hotend size and the material. If you are using the recommended profiles to print your models, normally the supports are not necessary when the overhang angle is smaller than the maximum overhang angle in our design guide: https://support.bcn3d.com/knowledge/designing-3d-print
If you want to improve or reduce the number of supports generated, you can visit our guide to improve the supports: https://support.bcn3d.com/knowledge/improve-supports