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Operation Concepts andOperation Concepts andBasic Jig Functions
CHAPTER 4CHAPTER 4
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4-1The two clamp bars hold workpieces hori-zontally or vertically. The side stops align the boards in the same position each time.
4-2The guidefinger assembly slides on to the support brackets above the workpiece.The finger assembly is adjusted in or out using calibrated scales on each end to suit different thicknesses of vertical boards.Note: The single rear indicator line on each support bracket is the only mark used in this guide. The front three lines are for the (optional) M2 multiple mortise & tenon attachment.
4-3The finger assembly is raised or lowered using the support brackets to suit different thicknesses of horizontal boards.
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HB TAILS
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2. TD PINS
3. HB TAILS
4. HB PINS
1. TD TAILS
THE FOUR SCALE MODESThe Finger Assembly attaches to the sup-port brackets in four different modes to match the type of joint you are cutting.
This line is for the finger assembly scales. The line is illustrated in red for clarity, but is black on the jig.
Note: Inch scales are shown here. Millimetre scales have identical layout.The active scale is always on the right of each scale assembly.
The inactive scale is always on inactive scale is always on inactivethe left of each scale assembly and is upside-down.
Scales are colour coded.Silver background for Through Dovetails.Green background for Half-Blind Dovetails.
The specific settings for each scale are fully described in the appropriate chapters.
Each scale has it’s own mode icon (a drawing of the joint part made in that mode).
These three lines are used only with the (optional) multiple mortise & tenon attachment.
Always read scales from directly over-head to avoid parallax problems.
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Start with the Finger Assembly in the D TD TAIL mode and follow these steps on your jig. Grasping the simple basic concept of operation will greatly assist you in understanding the instructions. Note that the active guide surface (against which the guidebush runs) is indicated in red in the illustrations.
Start at
THROUGH DOVETAIL TAILS (TD TAILS) mode.
MODE ICONSEach illustration in this manual includes the correct mode icon for it’s mode icon for it’s modecurrent instruction. Icons are also used in the text.
Now the Finger Assembly is in
THROUGH DOVETAIL PINS (TD PINS) mode.
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CONCEPT OF JIG OPERATION – THROUGH DOVETAILS
1.
3.
ROTATERotate the finger assembly toward you 180°.2.
FLIPFlip the Finger Assembly end-over-end 180°(to Half-Blind Dovetail Pins, Page 28)
4.
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INCHES MILLIMETRES
TD PINS
INCHES MILLIMETRES
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ACTIVE GUIDE SURFACES
ACTIVE GUIDE SURFACES
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Now the Finger Assembly is in
HALF-BLIND DOVETAIL PINS (HB PINS) mode.
5.
Now the Finger Assembly is in
HALF-BLIND DOVETAIL TAILS (HB TAILS) mode.
7.
ROTATERotate the finger assembly toward you 180°.6.
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CONCEPT OF JIG OPERATION – HALF-BLIND DOVETAILS
INCHES MILLIMETRES
INCHES MILLIMETRES
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12,7
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ACTIVE GUIDE SURFACES
ACTIVE GUIDE SURFACESACTIVE GUIDE SURFACESACTIVE GUIDE SURFACES
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CONCEPT OF JIG OPERATION - SLIDING DOVETAIL JOINTSThe HB TAILS mode is also used with the cross-cut fence to cut sliding dovetail joints.
Keep the finger assembly
With the Finger Assembly in
HALF-BLIND DOVETAIL TAILS (HB TAILS) mode, install the cross-cut fence.
Sliding Dovetail slotsare cut across the board face.
8.
Sliding Dovetail tailsare cut across the board end edge.
9.
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INCHES MILLIMETRES
INCHES MILLIMETRES
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in the same mode.
ACTIVE GUIDE SURFACE
ACTIVE GUIDE SURFACEACTIVE GUIDE SURFACEACTIVE GUIDE SURFACE
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