Darex V-390 - Manual (Page 13)

13
Wheel too high Correct Wheel too low
Split Angle Adjustment:
If the chisel angle of the drill has changed due to the relief ground
on the drill, then the point split rotational angle may need to be
changed. To adjust the split rotational angle, loosen the thumb-
screw, (See Picture #19) located on the point split port. Move the
bracket slightly to the left of the alignment detent (See Illustration
20) This will increase the split angle that is required if the relief has
been increased. Move the bracket to the right, counterclockwise, if
the relief has been reduced. The key to this process is to intersect
or remove the chisel line when splitting the drill point. (See Illus-
tration 21a & 21b located at bottom this page)
Center Split Adjustment:
The drill is split using the top edge of the grinding wheel. Because
the grinding wheel is seated on a hub, to correct the centering of
the split, you must raise or lower the edge of the wheel by adjust-
ing the wheel hub height. After a wheel change, grind a drill and
split the drill. If the center of the split is incorrect (See Illustration
#21) the height of the wheel hub will need to be adjusted.
x UNPLUG machine and remove wheel guard cover (See Picture
#22)
x Remove the exhaust vent located on the left side of the
machine. (See Picture #23)
x A 5/32 Allen set-screw is located on the side of the wheel hub.
(See Picture #24)
x Using a 5/32 T-Handle Allen wrench, loosen the set-screw.
(counterclockwise)
x Raise or lower the hub to correct the split. Moving the wheel
hub a small amount will change the centering of the split sig-
nificantly.
(Illustration C of 21) - Under split: When the top edge of the grind-
ing wheel is too low, the split will NOT come to center.
Raise the wheel hub height.
(Illustration B of 21) - Over split: When the top edge of the grind-
ing wheel is too high, the split will move past center.
Lower the wheel hub height.
Tighten the 5/32 set-screw, replace the exhaust vent and replace
wheel cover.
Sharpen and split drill. Repeat adjustment as needed.
Thumbscrew
Detent
Pic 19
Ill 21a
Ill 21b
Pic 23
Pic 22
Hub Height
set-screw
Pic 24
Illustration B Illustration C Illustration 21
Ill 20
Ill 21b
Ill 21a