Loosen this knob, raise or lower the dop arm to the desired cut angle, tighten the knob. At the approximate center
of the pivot plate is a fine adjust knob used to set the cut angle.
(14) PIVOT BLOCK (Fig 9)
The Pivot block pivots around the Pivot Axis and carries the Dop Arm (Quill) assembly. It swings through just over
180 degrees.
Fig 9
(15) INDEX PAWL and PLATE.
This Plate is secured to the Pivot Block and carries the Index Pawl and the Dop Arm. Micro adjustment, (cheating)
is achieved by a Knob on the left of the Index Pawl Spindle. On this Knob is a setscrew that is aligned with a notch
on the Index Pawl Plate. This is the setting for faceting.
The Index pawl is depressed to lift the Index Pin out of engagement with the Index Wheel and can be clipped back
under a Knurled Knob for freewheeling the Index Wheel.
(16) DOP ARM (Quill)
This is carried on two lightly pre-loaded ball bearings. The preloading prevents any end or side play in the Dop Arm.
The Arm carries the Index Wheel that is screwed to a brass ring by two screws. This ring has a grub screw for
locking the Wheel to the Arm. To change Index Wheels the two screws are removed. The Dop Arm is bored to
receive the Dops. A large flat point grub screw locks the Dop in the quill.
(17) INDEX WHEELS.
The machine is fitted with a 96 tooth Index Wheel as standard. 80 and 72 tooth wheels are provided. The Wheels
are secured with two small screws. These must be kept tight.
(18) DOPS.
Dops are flat cone and “V” form. The dops have a 45º chamfer milled at the end that is used for location in the Dop
Arm and the Transfer Block. A “D” dop for setting the cheater square with the Master Plate, a 45
0
Angle Dop and a
large Flat Top Dop
Summary of Contents for Patriot
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