The guide below applies to Dorsey Metrology 16H Benchmark optical comparator. It might not reflect actual features found on other products.

First step in optical comparator operation is of course switching the power on. The projector lamps are usually controlled by rocker switches on the lower front panel of the projector body. Separate switches control the profile and surface illumination lamps. The profile lamp uses a 2 position switch: down is low intensity, while up is high intensity.

Before using optical comparator to inspect part some pre-run checks might be required. First ensure that the projector is secure on its stand or on a substantial bench. Having selected a lens of the required magnification and locked it securely in position, locate the component to be inspected in a suitable work holding fixture which must be securely clamped to the table, the optical comparator is now ready for use.

Focusing

Focus is achieved by rotating the small hand wheel on the right hand side of the stage knee. The lens focal plane is approximately mid-way along the focus traverse, central to the dovetail slot in the table.

Profile Projection Intensity

There are two profile light intensity levels, high or low, selected from the rocker switch on the panel below the screen. Select the level that gives the most comfortable viewing, according to the object projected and the external lighting conditions prevailing. Profile lighting is provided by a 24V 150W tungsten halogen lamp. An iris diaphragm and or green filter is available as an optional extra which may be fitted direct onto the lamp house to reduce the level of reflection from brightly polished surfaces e.g. ground threads, etc.

Share and Enjoy:
  • services sprite Optical comparators operating basics part 1
  • services sprite Optical comparators operating basics part 1
  • services sprite Optical comparators operating basics part 1
  • googlebuzz Optical comparators operating basics part 1
  • services sprite Optical comparators operating basics part 1
  • services sprite Optical comparators operating basics part 1
  • services sprite Optical comparators operating basics part 1
  • services sprite Optical comparators operating basics part 1
  • services sprite Optical comparators operating basics part 1
  • services sprite Optical comparators operating basics part 1
  • services sprite Optical comparators operating basics part 1
  • services sprite Optical comparators operating basics part 1
  • services sprite Optical comparators operating basics part 1
  • services sprite Optical comparators operating basics part 1

Related posts:

  1. Optical comparators operating basics part 2
  2. Optical comparators operating conditions
  3. Optical comparator lamp replacement instructions