Robert Sorby RS205, RS215, RS210 Instruction Manual

RS2000 SYSTEM
Instruction Manual
Page 1
Several bowls can be made from one blank with minimum wastage
The hollow ground nose of the tungsten carbide tip allows deep plunge cuts, at any angle, to remove cones from bowls and vessels. The Slicer can also be used as a heavy-duty parting tool. The Slicer should be mounted in the Main Handle with the Side Handle assembled at a convenient position on the Slicer blade. It is recommended that the side handle be placed in the VERTICAL position to counteract downward forces.
Mounting Side Handle
The Side Handle requires Collar (RS203C) & Stud (RS203S) for use with Slicer or Hooker. The components are quickly assembled and can be readily locked in any convenient position.
Using the Slicer to produce several items from one blank
Traditional bowl turning techniques are usually wasteful in terms of material and time, and become particularly uneconomic when using expensive exotic woods. The following techniques enable several products to be made with minimum wastage.
Utilising the outside wastage
Making a picture or mirror frame
Fig 1. A) Mount the blank securely to a faceplate or screwchuck.
B) Rough down to round with a suitable bowl gouge. C) Cut a groove (say ¼” deep x ½” wide) to accommodate thickness of glass & backing plate. D) Part in a little deeper at the inside edge of the groove. E) Remove the outside waste, at an angle, with the Slicer.
Fig 2. A) Mount a suitable spare block to the screwchuck (say ¾” thick). B) Cut a rebate to suit the inside Ø of the frame and about 3/8” deep. NB. The edge of the
rebate should have a slight taper to ensure a good push-fit for the frame.
C) Push frame into woodchuck. D) Shape the outside and front of frame. E) Finally sand & polish.
Page 2
Turning several bowls from one blank
Fig 3. Having produced the picture / mirror frame, replace the bowl
blank and shape the outside. NB. The shape illustrated (fig.3) assumes reversed holding with spigot chuck -alternatively, a dovetailed recess could be cut to accommodate expanding dovetail collets.
Fig 4. Illustrates a series of plunge cuts at various angles, with the Slicer to 'cone' the inside. Begin with a 1" deep cut. Remove the Slicer and make another cut to the side of the first cut and about 1" deeper. Continue to make side-by-side cuts to penetrate to the desired depth.(with comfortable clearance on both sides of the Slicer!) The cone can be broken away when the root is down to about ½" to ¾”Ø. If the grain runs parallel to the spindle, then the root of the cone should be reduced to about ¼ to ½”Ø . Having removed the cone, the inside of the bowl can be turned with a gouge in the conventional manner.
Utilising the cone Fig 5. Remount the cone by original holding method. Reshape the
outside to accommodate reversed chucking as before (Spigot / Dovetail collets).
Fig 6. Resecure blank as Fig 4 and slice a cone from the centre as before. Remove the cone and shape the inside. NB. This process may be repeating several times depending on the diameter and thickness of the original blank.
WARNING – DO NOT ATTEMPT TO 'CONE' WITH THE HOOKER – THIS COULD BE DANGEROUS!
Resharpening the Slicer
The 400 grit Diamond Sharpening File RS224 provides a safe and simple method of sharpening the tungsten carbide tip. DO NOT attempt to sharpen the hollow flute! A few light strokes across the TOP face of the tip is sufficient to restore the cutting edge. Dip the Diamond File in water occasionally during use.
Page 3
THE REVERSIBLE HOOKER RS210
This tool enables internal shapes to be cut safely. Hitherto, this work was either impossible, extremely difficult or even dangerous! The special hook design, fitted with the multi - purpose HSS Cutter RS222, allows you to make both aggressive roughing cuts and also finishing cuts. Alternatively, the Swivel Tip RS211 can be used (see below). The Hooker has TWO seatings and is reversible for either inboard or outboard work. The side handle can be assembled at a convenient position on either side of the Hooker for right or left handed use.
IMPORTANT
The toolrest, as illustrated, should be far enough away from the work to allow only the straight portion of the shank to make contact with the toolrest!
The Hooker in use Fig 1. The majority of wastewood can be removed quickly from the
outside with the Slicer. These rings could also be turned into picture/mirror frames as shown on page 2. Fig 2. Rough shape the outside and decide upon the method to be used to hold the bottom. The illustration assumes the use of a 2"Ø spigot. Fig 3. Final shaping of the outside can be done after the work is reversed. Fig 4. Initial removal of internal waste can be done by plunge cutting with the Slicer or alternatively with a saw tooth machine bit held in the tailstock.
Extension Shank RS204
When working very deep vessels, it may be necessary to fit the Extension Shank. This provides an extra 9½” reach. It may also be necessary, in certain situations, to fit the Side Handle to the Extension Shank rather than to the Hooker.
Page 4
Fig 5a. Rough out the majority of the inside using the small aggressive tip of the HSS cutter -or use the Swivel Tip.
Fig 5b. The HSS cutter may be rotated by slackening the Allen cap
screw select the larger curves for finishing cuts.
Fig 6. The Sorby 977 calipers are recommended for measuring wall thickness.
Sharpening the HSS Cutter - Fig 7
This is best achieved on the bench grinder. By grinding 'square across' and in line with the centre of the wheel, the hollow grinding produces a cutting edge on both sides. Alternatively, a few light strokes with the Diamond File will be sufficient to restore the edge without having to remove the cutter from the Hooker.
Using the Swivel Tip RS211 – Fig 8
The Swivel Tip is supplied with a semi-circular Cobalt Steel cutter and longer No. 10 UNF Cap Screw for mounting to the Hooker. The nose form is ground to coincide in shape and size with the clamping discs and therefore allows the cutter to be set to remove a controlled thickness of shaving. The clamping discs act as a depth stop for each passing cut. The small radius point is best for aggressive roughing cuts.
Page 5
Dual Purpose Shank RS215
The Dual-Purpose Shank RS215 (as a scraper)
The Dual Purpose Shank mounts directly into the Side Handle RS203. The nose of the shank is fitted with a No. 10 UNF Alien cap screw for holding the HSS Cutter RS222. The 10° seating allows the shank to be held horizontally yet produces the accepted working angle for scrapers.
Shear Scraping
Scrapers are normally produced from rectangular section material and, as such, are used flat on the toolrest with the handle raised to produce the 'trailing angle' (Fig
1). By mounting the cutter to a round shank, shear scraping can be achieved. From the horizontal position, simply rotate the shank through approx. 45° (Fig 2) - this produces a slicing cut which gives a better finish and eliminates any tendency for the scraper to dig-in! If, for any reason, the cutter should 'bite', then the round shank will allow the tool to move SAFELY AWAY from the cut!
Use light cuts in a down-grain direction. The direction in which the scraper should be moved is indicated in the two illustrations where the grain runs in opposite directions (Figs 3&4).
The difference between cutting and scraping is that the angle between the upper face of the blade and the surface being cut is greater than 90° when cutting (Fig 5) but is less than 90° when scraping (Fig 6). Shear scraping is achieved when the cutting edge is tilted to the side (Fig 7). This causes the shaving to slide down the cutting edge rather than bounce off the blade in an upwards direction. This slicing action leaves a much smoother surface than conventional scraping.
The Dual - Purpose Shank (as a Chatter-tool)
The Allen Cap Screw must be removed and replaced in the opposite side of the shank.
NB. This serves TWO purposes:-
1) It prevents losing the Cap Screw.
2) The Cap Screw engages the slot in the Chattertool Collar and provides positive forward location for the Collar. The 10° seating on the shank is also grooved to accept the hardened spring steel chattertool cutters.
The Chattertool in use
Chattertool Cutters work best on the end grain of hardwoods but can also be used on acrylics and soft, non-ferrous metals. Set the toolrest above centre and far enough away from the workpiece (about 1½ to 2") to allow the shank to point downwards and provide additional clearance for the cutter to vibrate (Fig 8). When using the Chattertool for the first time, select the Pointed Cutter and allow the tip to project about ¾” from the Collar. Aim to cut on centre and apply sufficient pressure to set the cutter vibrating. You can use either the point or the side of the cutter to produce varying designs. Experiment with different cutter lengths.
The following will also produce different patterns:-
1. Change rotational speed
2. Cuts on, above or below centre
3. Stationary or traverse cuts
4. Change shape of the cutter
With the above permutations an almost endless variety of patterns can be achieved.
Page 6
Chattertool Design Variations
V Grooves
Using the cutter on centre at several fixed positions will give a variety of patterns depending upon length of cutter and speed of rotation.
Herringbone
V cuts made side-by­side will give a herringbone effect. The finer patterns come from slower speeds or shorter ^ cutter projections. The cutter is used on centre.
Lattice
Side movement with the blade turned through 45° allows t to vibrate diagonally. Use with light pressure and fast traverse to create a delicate woven pattern.
Linear Patterns
Using the same speed and cutter length will produce a finer texture at B than at A since the surface speed is slower. A coarser texture C comes from faster rotation and/or longer cutter projection.
Spirals (Anti-clockwise)
Cutter used ABOVE centre. When cutting above centre, work from left to right to prevent any possible kick­back. Use right hand straight side of cutter parallel to turned surface.
Spirals (Clockwise)
Using left hand side of cutter with cutter used BELOW centre the spirals run in opposite direction to those above.
Chatterwork is so effective and such good fun to do that you may be tempted to put it everywhere but it is best used sparingly with plenty of smooth surrounding surface to highlight it. Before attempting to apply chatterwork to finished projects, practice on a scrap of end-grain hardwood. The more you do it, the better you will know how to achieve the pattern you want. when you make a pattern that you like, note the variables involved so that you can recreate on future projects..
Sharpening the Chattertool Cutters
The cutting edges are ground at 90°. With the handle raised (as fig 8), the burr, produced during grinding, cuts like a small scraper. The Square, Pointed & Domed ends should present little difficulty when regrinding. Ideally, a formed wheel should be used when grinding the Hollow cutter. If this should not be available , use a slipstone or alternatively wrap a piece of abrasive paper around a 3/8Ø dowel and work across the nose of the cutter. 100 grit aluminium oxide paper will produce a sufficient burr.
FOR SAFETY – ALWAYS WEAR EYE
PROTECTION
Page 7
Loading...