Control of a handling machine

Control method for a handling machine (1) comprising a main body (2), a telescopic handling arm (6) mounted on said main body and displaceable in rotation about a horizontal axis of rotation (7), the axis of rotation being located on a first end of the handling arm (6) and a second end of the handling arm (6) being configured to receive a load to be handled, and actuators (8) configured to lift and lower the handling arm about the axis of rotation, and to deploy and retract the handling arm in a longitudinal direction of said handling arm, said method comprising:

• receiving from a tilt detector (11) a signal which is representative of a tilt moment (IS) applied to the main body about a tilt axis of said handling machine,
• receiving, from sensors (16, 18), measuring signals representing an extension range of the handling arm and an angle of inclination of the handling arm (6) relative to a horizontal plane or relative to the main body (2) of the handling machine,
• determining a cut-off threshold value as a function of the extension range and the angle of inclination of the handling arm (6), such that the cut-off threshold value (S1, S2) becomes less restrictive when an effective distance between the second end of the handling arm (6) and the tilt axis increases, wherein the effective distance () represents a distance projected onto a horizontal axis or onto a longitudinal axis of the main body,
• stopping (24) a movement of the handling arm in response to a detection that the signal which is representative of the tilt moment (IS) has passed the cut-off threshold value.