Slicing machine

A method for operating a slicing machine which is used to produce shingled or stacked portions from one or more slices to be separated from a product caliber and which comprises

• a cutting unit with a blade which can be driven in rotation about a rotation axis and whose position can be adjusted,
• at least one adjustable component which can be adjusted in position, in such a way that the at least one adjustable component could potentially enter a path of movement of the rotating blade in a colliding manner,
• wherein the at least one adjustable component comprises an adjustable discharge unit with at least one adjustable portioning belt,
• the method comprising:
• moving or adjusting during a control run before a start of a slicing operation,
• the cutting unit blade, rotating at most at 10 rpm about its rotation axis, or a control element and
• the at least one adjustable component;
• and
• checking whether a collision occurs between the blade or the control element and the at least one adjustable component, and
• the method further comprising:
• measuring a current consumption and/or a torque and/or a tracking error of a variable speed drive and checking for an impermissibly high value of the measurement,
• detecting a collision when the measurement hast the impermissibly high value and emitting at least one warning signal by a control in response to the detected collision.