Foley United ACCU-Pro 670 Assembly And Service Manual page 33

TROUBLESHOOTING (Continued)
--PROBLEM--
The top face of A--Coolant not directed onto
the bedknife the bedknife and grinding
shows burn wheel.
marks from being
too hot.
B--Too heavy stock removal
during grinding.
C--Grinding wheel is glazing.
Grinding wheel is A--Wheel needs dressing.
glazing too
quickly.
B--Too light a cut when rough
grinding.
C--Grinding head is traversing
too slow.
Grinding motor Grinding wheel is out of
vibrates exces- balance.
sively.
--POSSIBLE CAUSE--
BEDKNIFE GRINDING
--REMEDY--
Direct coolant into the grinding
wheel, at the point of the grind.
See Operators Manual.
Take off about .002 to .003"
[.05 to .075mm] per pass
during rough grind. See
Operators Manual.
Dress the wheel before the
finish-grinding pass on each
bedknife. See Operators
Manual.
Dress the wheel before the
finish-grinding pass on each
bedknife. See Operators
Manual.
Take off about .002 to .033"
[.05 to .075 mm] per pass
during rough grind. See
Operators Manual.
Set the traversing speed to 12
FT/MIN.
Visually check the outside-
diameter run out while slowly
rotating the wheel. Also check
the motor without a wheel
installed. Replace the wheel if
out-of -round.
33
--REASON--
When the front face of the
bedknife gets too hot, the
steel loses its temper
(softens).
Too much stock removal in
one pass creates too much
heat and softens the steel.
Wheel will glaze if not
dressed often enough.
Also, as a general rule, use
a higher traverse speed for
the heavy grind.
Wheel will glaze if not
dressed often enough. If
grinding wheel is not
extended 1/2" [12 mm] over
bedknife, it will glaze more
quickly because there is
less dressing.
Too light a grinding cut
doesn't permit enough
dressing action on the
wheel, so it glazes.
Too slow a traverse speed
can cause excessive heat
buildup in the grinding
wheel, which glazes the
wheel.
A grinding wheel which isn't
properly trued up on outside
or inside diameters can
vibrate excessively and
transfer that vibration to the
motor.