Adjustment & Calibration Operation Parts

Adjustment and calibration parts are the specific knobs, dials, and mechanisms you use to make tiny, precise changes to a machine's settings or position.
Their purpose is to fine-tune performance, align components perfectly, or set a specific measurement.
• Handwheels with Scales: The original example you mentioned. Turning it moves the machine table by a measured fraction of a millimeter.
• Tuning Knobs: Found on radios or scientific equipment to dial in a precise frequency or value.
• Dials on Scopes/Gauges: Used to set a "zero point" or fine-tune the sensitivity of a measuring instrument.
• Fine-Tuning Valves: Used to control the flow of gas or liquid very slowly and accurately in industrial systems.
Essentially, these are the controls used when "almost right" is not good enough and you need exact precision.