22
JIB FUNCTIONING
A balancing and anti-shock valve is flanged on the jib cylinder (27). Inside this valve there is an
electrovalve controlling the jib operation, according to the load that has been selected. When 200kg
are selected, the electrovalve is not powered, and the oil delivered to the piston is conveyed directly
to the tank. The oil delivered to the rod is conveyed to the tank through a hole (Ø=0.3mm) that is
necessary to avoid
couterstokes
when you stop the machine and at the same time not to leave the
rod side completely free.
A non-returning valve (34) prevents any pressure peaks inside the valveblock from coming back to
the valve, which would cause a slight opening of the jib arm.
BLOCK
VALVES
ANTI-SHOCK VALVES