14
djustments
urface grinder has been designed to give a long life of accurate finish
he following section is set up to assist you in getting maximum performance from the
Problem:
A
Your Harig® s
surface grinding. It has been thoroughly checked during manufacturing and final
assembly, and has been run-in and given a performance test.
T
machine. Each trouble or malfunction is listed followed by possible causes, together
with suggested adjustments or changes you can make. The subjects addressed are:
Page Number:
1. CHATTER OR VIBRATION MARKS IN FINISH
1. Chatter or Vibration Marks in Finish 14-16
2. Longitudinal Lines—Scratchy Finish 15
3. Inaccurate Grinding 16
4. Motors Do Not Run 17-18
5. Oil Dripping 18-19
6. Uneven Down feed Response 19-21
7. Improper Longitudinal Feed 20-21
8. Crossfeed Malfunction 21
. Wheel loose on sleeve.
eel adapter nut. Even if nut is not loose, motor starting torque may
. Wheel out-of-balance.
f balance. It is only a question of how much. (One can verify this
t.
the wheel has not been balanced, the chatter can be minimized by dressing the wheel at the
f a
-
d will
. Wheel not dressed on Sides.
on the sides, a chatter or vibration pattern can result because of
. Wheel in need of dressing.
has been used for a time, it is probably due to the fact that most
grinding wheels vary in hardness around the periphery. Since this chatter appearance is usually
A
Put additional tension on wh
be causing wheel to shift slightly. Redress after adding tension to the wheel nut.
B
All grinding wheels are out o
by holding the projecting part of the spindle housing while the grinder is running with the wheel,
wheel nut and washer removed, and by comparing the vibrations with the wheel mounted in
place.) Balance the wheel with a Harig® Wheel Balancer (No. 17794350) or comparable uni
If
grind point and taking a finishing cut that puts the same drag on the wheel as the dressing
operation. The wheel is dressed out-of-round to compensate for the amount of vibration. I
heavier cut is taken, however, the chatter will occur because of the “ hammering” of the out-of
round wheel at a different vibration rate. If a Harig® Accu-Dresser is used to dress an
unbalanced wheel, chatter in the finish will result because the wheel is dressed round an
“hammer” by the amount of vibration. A balanced wheel will give you more cycles between
dresses because of the elimination of this “hammering”.
C
If the wheel has not been dressed
the side-to-side movement of the edges of the wheel, and because the outside surfaces of a wheel
next to the mold are harder than the rest of the wheel.
D
If chatter appears after the wheel
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