47 - Build Your Own Mortising Machine , страница 25

FEATURE PROJECT

£ Setup & Uee

BIT JUST P TOUCHES WORK- ^ PIECE

WORK-

17o set up the mortising machine, lay out the mortise and butt the workpiece against the fence. Now lower the carriage, slide the table in or out (so the bit will cut the mortise at the desired location), and lock the knobs.

A The secret to cutting a crisp, clean mortise is to make a series of shallow passes.

NOTE:

GUARD REMOVED FOR CLARITY

CENTERLINE—

2 All it takes to J-J, establish the final position of the workpiece AM is to slide it along the fence until the bit is centered on the length of the mortise. Then simply clamp the workpiece to the fence.

NOTE:

HANDLE IS ROUGHLY CENTERED ON TABLE

ALIGN RIGHT END OF

UNDER BIT

3 To 1gj/'sef the stops, slide the handle to the left until the bit aligns with the right end of the mortise. Then adjust the bolt so it contacts the tower. After locking the stop, repeat the process for the other side.

4 With the tip of the router bit still touching the workpiece, adjust the depth gauge so the indicator points to the desired depth of the mortise. Then tighten the knob to lock the gauge in place.

No. 47 ShopNotes 25

6 After sliding the handle to the right until it stops, lower the carriage another Vq and push the handle all the way in the opposite direction. Continue this process until the mortise is cut to the desired depth.

5 Now you're ready to flip the switch on the router and start cutting the mortise. To do this, turn the crank to lower the carriage and plunge the bit into the workpiece. A shallow (Vs'-deep) cut works best.

first pass

second pass