SETTING UP GRINDER:
Remove the Blade support frame and
all telescopic arms and legs from box. Pre-Assemble the legs (#121,126,127) and fasten to
the frame. Unwrap the machine and set it on the frame with the front side facing you. Sit
the machine on the blade support frame and fasten it through the slots in the front plate
using the two M6 x 10mm hex head screws supplied. Unwrap the power supply and bracket and
fix to the front leg of the blade support frame. At this point it is important to screw in
the Knob (76) on the amplitude slide at least 19mm (3/4") to ensure the grinding
wheel, when fitted, will not touch the blade.
Once you have done that, install the grind stone (note
left hand thread on grinding wheel retaining nut) with it’s more chamfered edge
facing down. Insert the telescopic blade support arms into the "W" frame.
Install the vertical blade support rods and in their extreme ends and tighten them in
place with the 6 mm screws supplied.
Fit the plastic shield (115) to the cover (99) using 2
M5x10 pan head screws supplied.
GENERAL OPERATING DESCRIPTION:
The machine operates by two cams
being turned on a common shaft. One cam operates the feed mechanism through an adjustable
linkage, while the other oscillates the grinding head in unison. The timing of these
operations produce the tooth shape.
The feed cam (6) is fixed to the camshaft which when
rotated, moves the cam follower (33) whose movement is magnified through a translator arm
(38) to reciprocate the feed block (45). This reciprocating action is transferred to the
tooth picker (59) via a feed arm (52). The actual tooth position is determined with
adjusting screw (46-47) so that it should place the face of the tooth to be ground
immediately in front of the grinding wheel. It then returns into the gullet of the
proceeding tooth and begins to move forward again. After the face has been ground, but
just before the wheel has reached the bottom of it’s travel, the picker engages the
face of the preceding tooth and begins moving the blade forward allowing the wheel to
grind through the profile of the tooth. As the blade moves forward, the wheel at first
travels down into the gullet and then rises up as the back of the tooth. After grinding
the tooth back, the wheel continues it’s rise and clears the tooth. The picker
continues pushing the tooth so as to place the front face of the next tooth under the
grinding wheel to begin the cycle over.
The manual is set out under the following headings and
should be understood before using the grinder.
(1) Fitting the blade to the sharpening machine.
(2) Feed pawl adjustments and Grinder feed speed.
(3) The grinding wheel maintenance.
(4) Centring the Grinding Wheel.
(5) Machine adjustments to follow tooth profile
required.
(6) Bevel Tooth configuration. (Optional)
(7) Hipoint Tooth configuration. (Optional)
(8) Maintenance.
Please note that ultimate tooth shape is a function
of (2), (3) and (4) and alterations to any of these will modify tooth shape.
When first setting up bevel head machines it is
recommended to disengage the bevelling facility by removing the Idler Gear (B36) from
engagement which is retained with a pan head screw through a slot in the rear plate. Turn
the cam/gear (B23-B24) by hand until the cam follower (B27) rests at its central position
with the head square. (See Bevel Head annexure)
