INProfile Issue 3 | Page 19

1. Setting-up the Jig Ensure that the jig is assembled and secured to a work surface as shown in the instruction manual. Before continuing check that the correct edge guides are fitted to suit the template being used. There are 4 sets of guides, each set consisting of a lefthand and right-hand plate to suit each template. Extra guides are provided should rebated drawer fronts be required. Clamp the gauge in position with the setting line aligned with the inside edge of the first slot in the template. Remove the template and slide the edge guide along until it is against the gauge. Tighten the locking screw and repeat this procedure at the other end of the jig. Remove the setting gauge and retain it for future use. Carry out the following steps for 1/2 inch dovetails; steps one to three are carried out only once on initial set-up: Clamping the timber Following the sequence marked on each piece, position the first drawer side beneath the front bar on the left hand side of the jig and tighten the clamp. Position the drawer front under the top bar, butting it against the drawer side and the edge guide, and clamp it firmly. Slacken the drawer side and raise it until flush with the top surface of the drawer front and re-clamp. 4. 3. Ideal Timber Widths For the 1/2 inch dovetail template the finger ‘pitch’ is 21.5mm therefore the timber widths should ideally be multiples of 21.5mm (e.g. 3 tails = 64.5mm, 4 tails = 86mm etc). For the 1/4 inch template the pitch is 11.3mm therefore the material widths are 3 tails = 44mm and 4 tails = 45mm etc. A simple lookup table is provided in the instruction manual. Fit the guide bush to the base of the router and the dovetail cutter in the collet. (Use the large guide bush ref. GB157 for 1/2 inch dovetails, and the small diameter guide bush ref. GB774 for 1/4 inch dovetails). The height of the 1/2 inch dovetail cutter should be set approximately 17mm above the router base and the 1/4 inch dovetail cutter approximately 11mm. The exact height can be obtained by making a test joint and adjusting it to suit the tightness of joint required. Autumn 1999 Marking out the Components Having cut the timber to size, it is essential to set out and mark the order of assembly so that each piece is fitted into the jig in the correct order and the right way up. When joining the drawer front to the sides, the dovetail joint on one side of the drawer is cut on the lefthand side of the jig and the other is cut on the right. Remember that the joints are cut with the Front inside faces of the drawer facing up (drawer front) and outwards (drawer side). Right side 19