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fNORTON^
SWIVALIGN#* Dual Electric Indicator
for Measuring Swivel Table Adjustment
GRINDING AND LAPPING MACHINES
J> A IV ALIGN
This device, applicable to NORTON Cylindrical and
Universal Grinders, simplifies the adjustment of swivel
tables to correct errors in grinding exact tapers or to
eliminate taper in straight work. It consists of one elec
trical pick-up unit with zero adjusting knob at each end
of the swivel table, and a two-channel amplifier having
a pair of indicating meter elements reading on
a common
scale. Each meter needle responds to movement of only
one of the pick-up elements.
Connections
in the same direction of rotation as the swiveling of the
table. Thus if the table is swiveled clockwise (as viewed
from above), the needles rotate clockwise and vice versa.
are so arranged that both needles move
I'
—
S
•SWIVAL'IGN—Norton trade name for Dual Electric Indicator for accurate measurements
NORTON COMPANY
Offices in Worcester, West Hartford, New York Area: (Teterboro. Nj.Jj),.
of swivel tablo adjustment.
-----
GRINDING MACHINE DIVISION
Worcester 6, Mass., .U.S.A.
Cleveland, Detroit and Chicago
(
OVER
)
CS NO. 7-3M-NEO
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Divisions on the meter scale indicate directly taper
changes in thousandths of an inch per foot of taper. Two
ranges of readings, one for extremely accurate settings
with graduations of .0001" per foot and the other of
.0005" per foot of taper change are provided. The
TO ALIGN THE SWIVEL TABLE FOR A SPECIFIC TAPER
desired range is obtained by a selector switch on the
front of the instrument case. A conversion chart on the
side of the instrument case gives taper foot values for
corresponding micrometer readings of work diameters.
1.
Make an approximate setting using the gradua
tions of the swivel table gib, grind and measure the taper
in inches per foot.
2. Determine the error in taper which is the amount
of adjustment required. Note the direction of table
ment-clock-wise or the opposite.
3. Adjust the pick-up screws to set the two needles
on the instrument to register the taper change required
but in the opposite direction from the table movement.
4. The swivel table adjustment may now be used to
swivel the table until both needles have moved to the
zero position on the meter scale.
If movement of the table is sluggish the needle record
ing motion at the headstock end of the table may fail
to move or follow the other needle. This means that the
table is being deflected and a slight rap or jar on
the table will usually break the oil seal and permit both
ends of the table to move the same amount. When
move-
both needles are at the zero mark the table is straight,
the work centers are in alignment and the error has been
corrected.
5. Clamp the swivel table and grind.
If accuracy requirements are extremely close it may be
necessary to repeat steps 2, 3 and 4 using the .0001"
per foot scale.
It
will be readily seen that since corrections made are
based on adjustments of the pick-up screws at the ends
of the table and the needles register taper per foot—not
actual table movement In inches, use of the device is
independent of the location of the workpiece relative to
the pivot point of the swivel table.
We have only to determine the correction necessary
by actual measurement of the work, set the needles for
the correction and adjust the swivel of the table until
both needles are at the zero mark. No complicated
formula, no cut-and-try adjustments and no guesswork.
Printed in U. S. A.
o
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