OWNER’S MANUAL Please take just a few minutes of your time to read your new INCRA TWIN LINEAR owner’s manual. You’ll find it full of interesting and useful information about safety, setting up, and putting to use the many wonderful features of the TWIN.
CONTENTS SAFETY Important safety instructions for using the INCRA TWIN LINEAR. Before using, read and follow all of the instructions and safety information in this manual. SAFETY . . . . . . . . . . . . . . . . . . . . . . . . 2 ❐ When using the INCRA TWIN LINEAR in conjunction with any other tool, first read and follow all instructions and safety information in that tool’s owner’s manual.
TWIN LINEAR SETUP Fig. 1 For those of you setting up the TWIN on an “INCRA NOTE TWIN ready” router table, the mounting holes will be predrilled with T-nuts installed. Skip to Step 2. Suggested router table dimensions Suggested Router Table Dimensions If you don’t already own a router table, Fig. 1 gives minimum dimensions for a table top designed around the TWIN and its capabilities.
3 Attach Outfeed Fence Fig. 3 Before you slide the carriage back into the base, take a look at the black thumbscrew that passes through the clear acrylic hairline cursor on the base. Fig. 3. The thumbscrew is screwed into a rectangular nut. Make sure that the rectangular nut slides into the T-slot in the top of the infeed carriage when you slide the carriage back into the base. Now slide the carriage into the base and position the front of the fence directly over the hole in your table top.
ACCESSORIES Hi-Rise Fence Cap Locate the (2) fence cap braces over the threaded holes on top of the fence mounting bracket and attach with the 1⁄ 4 - 20 x 3 ⁄ 8" socket head cap screws and washers from the Hi-Rise hardware packet. Using the (2) 10 - 32 x 1 ⁄ 2" phillips pan head screws, nylon washers, and 10 - 32 hex nuts, attach the fence cap to the two braces as shown in Fig. 6. The slotted holes in the fence cap should be aligned to provide access to the front brace mounting screws.
Installing Extender Bar Fig. 8 Here’s another accessory you’ll find useful from time to time. The extender bar will allow you to set its sliding stop up to 16" beyond the end of either the infeed or outfeed fence. Fig. 8 shows the proper placement for the extender bar. Insert the extender bar with the scale facing forward and lock in place with the 1⁄ 4 - 20 X 3⁄ 8" socket head cap screw, stainless steel washer, and rectangular nut as shown.
6 Zeroing INCRA Stop to the End of a Board For most applications, you will be using your INCRA Stop on the outfeed end of the INCRA Fence to control the length of a cut relative to the front end of the board. Here is how to set the initial scale position for this type of setup: Fig. 11 Top view of stop setup 5 After installing the bit you wish to use, set the fence to bit distance at about 1".
OPERATION Moving to a New Scale Setting Moving the fence to any new scale setting is just as easy as moving any other fence you’ve used before. Push the carriage clamp down to unlock the carriage, then slide the fence as you sight through the hairline cursor. When you see your measurement under the hairline, pull the clamp back up to the locked position, Fig. 14. Remember that the INCRA TWIN will only clamp every 1/32", so don’t try to clamp in between scale marks.
Micro Adjusting The micro adjust feature of your INCRA TWIN allows for precise positioning of the fence to any location between the 1/32" tooth spacing of the INCRA sawtoothed racks. You’ll find this feature extremely handy the next time you need to widen a mortise by a hair for a great fitting mortise and tenon joint. Use the micro adjuster for a flawless fit when cutting grooves to accept inlay strips or to loosen up a tight-fitting box joint cut with an undersized bit.
Offset Adjustment The infeed and outfeed fences of your INCRA TWIN can be moved independently in two directions to provide a variety of setup configurations. By making the offset adjustments described below, you can position the fences “in-line” for standard cutting operations such as grooving, rabbeting, and jointmaking. You can “offset” the infeed and outfeed fences for specialty cutting applications such as shaping or jointing an edge.
Outfeed Fence Adjustment Most offset fence operations can be accomplished with an infeed fence adjustment, but on occasion you may wish to fine-tune the outfeed fence without altering the infeed fence position. Here’s how it is done. See Fig. 18 as you read the steps. 1 Tighten the rear black thumbscrew 2 Place carriage clamp in micro adjust mode and loosen forward black thumbscrew It’s located next to the hairline cursor. This thumbscrew locks the position of the infeed carriage.
Gap Adjustment Follow these steps to adjust the opening between the infeed and outfeed fences (See Fig. 19) Fig. 19 Adjusting the fence gap Caution: When adjusting the fence opening or gap, never position the aluminum fence ends closer than 1/8” from the router bit. 1 Using the supplied hex tool, loosen the (4) socket head cap screws that hold the fences to the fence mounting bracket.
4 Attach subfence to infeed fence 5 Position fence for initial profiling cut Fig. 22 Place the (2) 1/4 - 20 x 3/4" socket head cap screws with washers through the holes in the subfence and loosely attach the 1/4 - 20 rectangular nuts. (Fasteners supplied in the auxiliary fence hardware pack) Slide the subfence onto the infeed fence so the fasteners are captured in the T-slots. Move the subfence forward until stopped by the outfeed fence and tighten the fasteners, Fig. 23.
IN-LINE FENCE APPLICATIONS With the infeed and outfeed fences set in-line, your INCRA TWIN can be used for a variety of typical fence applications including grooving and dadoing, as well as edge forming operations such as rabbeting, chamfering, and roundovers. You’ll also find the in-line position useful for many specialty operations.
Vertical Panel Raising The introduction of the vertical panel raising bit has made cutting this allimportant component of frame and panel construction a relatively simple operation for the router table. You’ll find your INCRA TWIN with its built-in dust collection, adjustable fence gap, and Hi-Rise fence cap perfect for this operation. The setup is as follows: 1 Install vertical panel raising bit and set appropriate depth of cut 2 Adjust fence gap as necessary Fig.
OFFSET FENCE APPLICATIONS One of the most valuable features of the INCRA TWIN LINEAR is the ability to offset the infeed and outfeed fences. The offset fence adds a whole new dimension to the router table, allowing it to perform two new operations: jointing and shaping. Jointing Most woodworking projects require that your boards begin with at least one straight edge. This one edge then becomes the reference surface for subsequent perpendicular or parallel cuts.
Shaping Many shaping operations involve the removal of the entire edge of a square piece of stock as it is moved past the cutter. With a careful offset fence setup, a shaping operation can simultaneously straighten or joint the shaped edge. Here’s how: 1 Install router bit 2 Adjust fence gap as necessary Fig. 29 Set initial fence position Set desired depth of cut Align outfeed fence with the smallest diameter on the cutter See Gap Adjustment on page 12.
ADJUSTMENTS All of the components and features of your new INCRA TWIN LINEAR have been factory set and should require no further attention. If, however, you wish to adjust or recalibrate these components, the following information is provided to assist in performing the adjustments. The INCRA TWIN’s base must be attached to the router NOTE table with all eight mounting screws (see Fig. 3 on page 4.) before adjusting the clamping pressure.
Realigning the Carriage and Fence Racks forward to tighten the other screw. Continue with this bridging and tightening operation between racks #2 and #3, then finally between #3 and #4. On the side of the outfeed (gold) carriage you’ll notice (4) sawtoothed INCRA racks. To realign these racks, loosen the phillips head screws that hold the forward (3) racks in place. Do not loosen the screws on the rack at the rear end of the carriage.
PARTS AND OPTIONAL ACCESSORIES Part # Part Description Price TL-CURSOR Hairline Cursor (with mounting hardware) $ 7.95 ISTOP Stop Positioner (with mounting hardware) $ 22.95 IEXT18 18" Stop Extender Bar with auxiliary stop, scale and hardware $ 15.95 IJPT1 Incra Jig Projects & Techniques Book Features 14 original Incra projects, 4 exclusive new Incra joints, and a wealth of tips and techniques that will help you master the Incra Jig $ 22.
