How can abnormal vibration on a meat grinder be identified?

First distinguish periodic from random vibration: a rhythmic shake usually points to an unbalanced cutting plate or worn bearings, while general wobble often means a weak base or poorly levelled feet. During acceptance, observe no-load and loaded running separately, and check foot loading with a spirit level. If the supplier quotes vibration figures, they are useless unless measuring points and operating conditions are stated. Minor faults tend to surface only under full-load continuous grinding, so simulate real output and installation clearance at the trial. Compare the first machine's readings against subsequent production units and stop for bearing and plate inspection on any deviation.