thanks so much guys.
the 90 percent of the excavator (excluded pump ecc ecc ecc) is made by laser cutting.
is not easy to make a project and drawing but now is more easy to built.
now i wanna talk about a slip ring.
this slip ring is custom made for my excavator, is not a cheap slip ring but i can't put on a cheap stuff for an important thing like a traks motor power.
each wire is 15A current limit and is enough for my motor power.
the diameter of the alloy case is 45mm and 35mm thick.
ciaoo PAolo