The process consists in using the knife to cut a reference mark (e.g. a cross), and then jogging the spindle to the respective reference mark. The router's current position is the offset between the two tools.
- Knife blade.
- Pointed bit (e.g. 'V' cutter).
- Sample material to cut with the knife.
Create reference mark:
- Release toolholder from chuck.** Place knife blade into the knife.
- Rotate the knife parallel to the 'Y' axis.
- Zero the 'X' axis.
- Cut the first line along the 'Y' axis.
- Once the first of two lines is cut, position the knife in the center of the cut line.
- Rotate the knife 0.25 of a revolution.
- Zero the 'Y' axis.
- Cut the second line along the 'X' axis.
Measure and save the offset:
- Add toolholder with pointed bit into the chuck.
- Carefully position the pointed bit in the intersection of both lines.
- Once the bit is correctly positioned, the current 'X' and 'Y' position is the offset between the knife and the spindle.
- In Setup->Tools, add the offset as a tool and add special case as 10.