Mobile cam device for commanding needles of a needle bed of a knitting machine

A method for realising a mobile cam device (1) for commanding needles of a needle bed of a knitting machine, the method comprising steps of:

• predisposing a body (2) of the device provided with at least a first housing seating (4a) having a longitudinal extension and configured such as to movably house at least a first actuator (5a) in the body, the first seating (4a) being provided with a first bottom end (11), open on a rear side (41) of the body (2), and a second head end (12), opposite the bottom end and open on a front side (42) of the body (2), configured to be facing towards the needles of the knitting machine;
• predisposing at least a first command cam (8a) configured to interact with at least a needle of a needle bed of a knitting machine;
• predisposing a first actuator (5a) comprising a first piston (15a) and a second piston (16a) and configured to move in a controlled way the first command cam (8a);
• inserting the second piston (16a) from the bottom end (11) of the first seating, such that the second piston (16a) is housed translatably in the seating;
• at least partially inserting, in the head end (12) of the seating, an engaging portion (81a) of the first command cam (8a), and mounting the engaging portion to the second piston (16a), such as to constrain the first cam solidly to the second piston;
• inserting the first piston (15a), from the bottom end (11) of the seating, so that it is translatably housed in the seating and is arranged in series to the second piston (16a) along the longitudinal extension of the first seating;
• selectively and independently activating the first and second piston of the first actuator in order to command the movement of the first command cam.