HEIDENHAIN ND 1300 VED and Crosshair Systems - Manual (Page 68)

48 QC-300 Series User’s Guide
Preparing to use video probes
The accuracy and repeatability of video probing depends on the condition of the system, the condition of
the part, video magnification, part lighting and optical focus.
System and part condition
The system is presumed to be well-maintained which implies a clean stage and optical system, free of
scratches and other damage. The part to be measured is also presumed to be clean and undamaged.
Selecting video magnification
Select a different video magnification by adjusting the camera optics, touching the magnification button
and then touching the desired magnification in the drop-down menu. The magnifications that appear in the
drop-down menu are added and calibrated in the Magnifications setup screen by supervisors, distributors
and OEMs.
Adjusting light control
The video back light, surface light and ring lights are adjusted to optimize part illumination by selecting the
desired light sources and operating the light slider controls. Light sources can be different in each system
and can include:
• Back light Single light source directly under the part that provides back lighting
• Top light Single light source directly over the part that provides surface lighting, sometimes
through the lens
• Ring lights Four light sources are enabled or disabled individually and distributed in a ring
around the camera axis. The light intensities of all enabled ring lights are controlled
simultaneously as a single group. The ring lighting is often provided by one source.
To adjust the light sources:
1 Touch the Light/Image tab at the bottom of the screen repeatedly to display the Light controls.