I'd say.

Mindestens wenn es sich um Stoff handelt.

Are you refering to the left over material or to the overshoot of the maschine past the end of the material, Kristina?

@KGW: "Weg" denotes a distance, not a quantity of material etc.

That's the way I would understand it, Bastian, in which case the suggestions of Helmi and Patman2 would be off track.

Der Restweg von der X-Achse betrug 15 mm.
The remaining travel on the X-axis was 15 mm.