PATTERN 5.
Set the cutter to the middle, enlarge the circle four turns; then turn the slide-rest screw two numbers to the right, cut one circle, and for each of the other eleven, screw the chuck down one turn, then return to the middle and cut eleven the other way. When 23 are finished, screw the slide rest to the left four numbers, and cut 23 more exactly in the same manner. To work the side patterns begin by that on the right, set the cutter to the middle of the work, unscrew it two turns, move the cutter slide twelve turns to the right on the slide-rest, cut the middle circle, enlarge one number of the cutter, lower the eccentric chuck one turn, and, to keep the outside of the circles in a straight line, move the screw of the slide-rest inwards half a number: proceed the same till the nine circles are cut, then return to the middle circle by counting back nine turns of the eccentric chuck, nine numbers of the cutter, and four and a half numbers on the slide-rest; proceed exactly in the same way to cut the other eight circles, only raising instead of lowering the eccentric chuck one turn for each circle. The opposite pattern is worked the same, only taking care to turn the slide-rest screw outwards the half turn for every circle, or the straight pattern will come contrary.
In all these straight patterns take great care that the fly-wheel is stopped in such a manner that the eccentric chuck stands perfectly upright: to do this, hold the T square against one side, and make a mark on the brass wheel for the stop to enter. When you are quite sure that the chuck inclines neither to the right nor the left, drill a small hole in the wheel sufficiently deep for the stop to hold it quite firm. You will then find your patterns will always come straight.