16
G
C. “Hard-shell” sides on wheel.
Break the corners of the grinding wheel with an abrasive stick.
D. Grinding swarf in coolant.
Clean out coolant tank.
3. INACCURATE GRINDIN
. Magnetic chuck clamped too tightly or too loosely.
y may warp the table, causing it to rock in the saddle ways
ther than tracking smoothly. If chuck is not clamped tight enough, it could shift position and
old the chuck in position. Then
vibration isolation pads that support
e grinder on the cast stand has been adjusted to support the grinder base so that the plane of the
l with the plane of the flat ways. If grinder base is located on
s and
hen the grinder is turned on and off,
r when a heavy cut is being taken. This could cause the grinder to cut an additional few
pearance on the surface.
necessary to realign the spindle in its housing
y adjusting the tension of the five set screws that hold the spindle cartridge in place.
can then
e swung. If this indicator has a higher reading for the right-hand position tighten the upper
ing
s, can
hange this indicator reading slightly.
A
A chuck or fixture clamped too tightl
ra
lift up and over dirt. Tighten one of the clamps firmly to h
tighten the other clamp only enough to keep the chuck down on the table.
B. Wheel glazed and not cutting freely.
Redress the wheel, or replace the wheel with a softer grade.
C. Machine out-of-level.
Be sure that the cast stand is level. The thickness of the four
th
V-ways are exactly paralle
anything other than its own cast stand and vibration isolation pads, check base ways for twist by
laying a small surface plate on two 1.000-inch rolls in the V-ways and add two .582” +/- .0002”
parallels on the flat ways of the base. If the two rolls are placed in the ends of the V-way
one of the parallels put in the center of the flat way, the height of the pads should be adjusted
until one gets the same “feel” at either end of the flat way with the other parallel.
D. Magnetic Chuck in need of dressing.
See “Grinding Magnetic Chucks” in operating instructions.
E. Grinding Wheel shifted in adapter.
If the wheel is not tight enough on the adapter, it can shift w
o
thousandths, as well as giving a chatter ap
F. Down feed inaccurate.
See section “Uneven Response in Down Feeding”
G. Side grinding not square.
If the cartridge spindle has been replaced, it will be
b
To check the squareness of the spindle to longitudinal travel of the table, an angle plate can be
indicated parallel to the table travel, and an indicator fastened to the nose of the spindle
b
right and lower left set screws on top of the spindle housing to shift the spindle slightly.
The angle plate can also be used to check the spindle axis parallelism to the work table. Vary
the tension applied by the bottom set screws, against the tension of the four top set screw
c
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