This depends on the grinding head you use and the type of saw blade you want to sharpen.
With the new grinding heads, you no longer have to choose between sharpening twice or three times with the same grinding head. Both grinding heads are designed for a two-stage sharpening process to achieve the desired result.
Coarse grinding head
Use the coarse grinding head for saw blades you want to use on:
Wood
Plasterboard
Plastic
The coarse grinding head makes the saw blade suitable for materials where a rougher tooth profile works better.
Fine grinding head
Use the fine grinding head for saw blades you want to use on:
Hardwood
Aluminium
Copper
Other soft metals
The fine grinding head makes the saw blade suitable for materials where a finer tooth profile is needed.
Pay attention to the type of saw blade!:
The materials you can cut also depend on the saw blade itself. Not every saw blade is suitable for every material.
Always check the information for the saw blade you are using. The packaging or product information usually shows which materials the blade is suitable for.