About Fred V Fowler
Zeiss Improves Inspection
Fowler/Wyler 2D Level Sensors
MN,- A new way to check out rotational deviations on
the sophisticated coordinate measuring machines produced
by Carl Zeiss,
Inc.'s IMT Division reduces inspection time by two hours
to Brad Hanneman, Calibration Group Leader at the IMT manufacturing
plant, "I know of no other rapid way to correct rotational
devices. This is an operation that used to require lengthy
measurements using mechanical indicators on a master reference
plus long and drawn-out calculations to correct these deviations."
is a special 2-D Fowler/Wyler
measuring system designed to measure CMM geometry. The X-Y
reference level is set on the CMM surface plate and the Wyler
transducer is mounted on the coordinate measuring machine
transducer sends out a signal and IMT takes the signal from
a Hewlett-Packard multimeter, recording the rotational deviation
of the X-axis. This information is sent to a computer system
which produces proprietary computer-aided accuracy software.
generates a file that corrects any rotational error detected
by the Wyler system," Hanneman adds.
uses the new system, supplied by Fred V. Fowler Company,
exclusive US agent for the Wyler products, to insure the
accuracy of its "Prismo Vast" (Variable Accuracy and Speed
Probing Technology) coordinate measuring machine. This CMM,
whose probe head combines single point and scanning probing
technologies, enables form and position inspections to be
done on the same CMM that measures linear dimensions. It
gives form tolerances that can be measured up to an accuracy
of 0.0017mm scanning at 5mm/second. Scanning at 20mm/second
accuracy is 0.0034mm. Because of its new active interface,
VAST can provide automated temperature measurement as well.
of two hours inspection time per machine has offered higher
productivity and quality.
uses the 2-D Fowler/Wyler measuring system on several different
models of its CMMs. On occasion, Hanneman reports it is also
used in the field to check proper machine performance and
make all necessary corrections after the CMM is delivered.
for these coordinate measuring machines include General Motors,
Honda, Pratt & Whitney, and John Deere, among others.
"In a nutshell," concludes Hanneman, "we can now correct rotational
deviations electronically from information supplied by the
Wyler system. It's a neat solution to a complicated problem."
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