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Chapter 23 Sawing with Stationary Power Machines.

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Presentation on theme: "Chapter 23 Sawing with Stationary Power Machines."— Presentation transcript:

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2 Chapter 23 Sawing with Stationary Power Machines

3 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Select stationary power saws for making straight or curved cuts. Discuss the proper operation of stationary power saws. Choose the most appropriate saw blade for a given operation. Maintain stationary power equipment. Objectives

4 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Fundamental operation in cabinetmaking Machines designed to cut straight-line or curved-line cuts Select safest appropriate saw for cut –Choose most efficient if more than one is appropriate Prior instruction, experience on machine Sawing with Stationary Power Machines

5 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Disconnect power when changing blades, servicing Ensure blade is clean, sharp Install, adjust point-of-operation guards Support material before and after cut Feed material into saw properly Ensure dust collection is working Safe and Efficient Operation

6 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Machine operations affected by which hand is used Some operations may be reversed Others should be set up one way Handedness

7 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Standard operation in cabinetmaking Blade selection critical Machines with circular blades best option Fences aid in guiding material for straight cut past blade Sawing Straight Lines

8 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Left- or right-tilting arbor Circular blade extends up through table Blade raising device Tilting device Tilting-Arbor Table Saw SawStop LLC

9 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Tilting-Arbor Table Saw Guiding Material Rip fence Miter gauge Sliding table Jigs, accessories Laguna Tools Patrick A. Molzahn

10 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Protect user from blade, flying debris Mount to table or saw- trunnion Splitter Anti-kickback pawls Overhead guard Riving knife Tilting-Arbor Table Saw Blade Guard SawStop LLC Patrick A. Molzahn

11 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Tilting-Arbor Table Saw Setup Decide whether to use rip fence or miter gauge Set blade height Square blade

12 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Setting Blade Height and Squaring Blade Patrick A. Molzahn Chuck Davis Cabinets

13 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Ripping Crosscutting Beveling Mitering Resawing cutting dados Operating the Table Saw

14 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Ripping –Cutting lumber along grain –Set blade height –Measure from fence to tooth set toward fence –Ensure blade guard, riving knife or splitter in place –Stock must have one flat face, one straight edge –Stand to one side of blade Ripping Lumber on the Table Saw

15 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Ripping Plywood on the Table Saw Carbide-tipped blade Set blade Use guard and splitter Set fence Patrick A. Molzahn

16 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Carbide-tipped blade Set blade height Guide material with miter gauge Crosscutting duplicate parts to length – Stop with miter gauge – Stop with rip fence Crosscutting Lumber and Plywood on the Table Saw Patrick A. Molzahn

17 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Choose blade based on smoothness of cut required Wood veneered panels require same steps as solid lumber Panel saws equipped with scoring blades, preventing tearout Sawing Nongrain Manufactured Products

18 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Sawing with blade tilted Joint making, shaping Set saw tilt angle with tilt scale, T-bevel, protractor, triangle Blade angled away from fence, miter gauge Beveling Patrick A. Molzahn

19 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Cutting angle using miter gauge Set blade square to table Adjust miter gauge to required angle Prevent creeping – Abrasive-covered wood auxiliary fence Mitering Patrick A. Molzahn

20 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Two or more pieces from one piece May require multiple passes Keep same face against fence Side-mounted guard Resawing Chuck Davis Cabinets

21 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Prone to kickback Two methods –Zero-clearance throat plate, push stick –Position strip on offcut side of blade, stop block positioned before blade Ripping Narrow Strips

22 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Dado set Stacked set of blades, cut grooves Dados cut perpendicular to grain Ploughs cut with grain Cutting Dados, Ploughs

23 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Table tilts Most operations same as tilting-arbor – Beveling is exception Tilting Table Saw

24 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Horizontal or vertical – Sliding table feeds material into blade Beam saw – Cuts multiple sheets at one time Scoring blades Panel Saws Patrick A. Molzahn Casadei Busellato

25 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Used to cut stock to length Saw blade, blade guard, motor above table, mounted on yoke Sized according to blade diameters Radial Arm Saw Delta International Machine Corp.

26 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Change when dull or for different operation Remove guard Secure motor Use wrenches to hold arbor or blade, loosen arbor nut Install new blade Changing Radial Arm Saw Blades

27 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Wide range of adjustments –Elevation crank, arm, yoke, motor Only yoke moves during sawing –Locked for ripping Monitor adjustments frequently Radial Arm Saw Setup

28 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Lock arm, yoke pivot, bevel at 0  Power off Align blade Back off blade, turn on Pull saw across board, saw back through kerf Saw off, wait for blade to stop completely Radial Arm Saw Crosscutting Patrick A. Molzahn

29 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Clamp stop to fence Place workpiece against stop, make cut Attach stop to fence at desired length for wide material Crosscutting Multiple Parts Patrick A. Molzahn

30 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Mitering – Rotate saw arm right or left to proper angle Kerfing – Raise blade above table Beveling – Motor and blade assembly tilt Protect table Other Radial Arm Saw Setups

31 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Band saws – Large radius curves, large components Scroll saws – Small radii, curves Relief cuts – Waste breaks loose – Less chance blade will twist, break Sawing Curved Lines

32 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Continuous, thin blade travels around wheels – Blade guide – Guidepost Bottom wheel drives blade, top wheel can control blade tension, alignment Distance from blade to side frame is throat Band Saw Delta International Machinery Corp.

33 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Plan sawing sequence – Cuts, workpiece to which side Check setup – Adjustments, guard, locking devices – Set up saw guard – Check blade tension Band Saw Operation Patrick A. Molzahn

34 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Cutting radius depends on blade width, set Relief cuts where direction changes Do not push workpiece against side of blade Curved-Line Cutting on Band Saw Patrick A. Molzahn

35 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Requires guide Adjust for drift Miter gauge for cross cuts Cut narrow strips on band saw Straight-Line Cutting on Band Saw

36 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Three sides of opening sawn Alternatives to relief cuts –Saw sides straight –Drill turn-around holes –Bore inside corners with radius bit U-Shaped Cutting on Band Saw

37 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Table or head tilts Set angle with scale or T-bevel Freehand or with guides Beveling on Band Saw

38 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Band Sawing Multiple Parts to Size Stack, fasten workpieces together Make relief cuts Saw along cutting line Last two cuts should free parts from waste Use guide if necessary

39 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Use auxiliary fence or pivot block – Set given distance away from blade Mark thickness on board edge Cut in one pass Allow for drift Use push block last 3  Resawing on Band Saw Patrick A. Molzahn

40 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Cuts small radius curves, interior openings Table can tilt Blade held by two clamps, moves up, down Size based on throat depth Scroll Saw Delta International Machinery Corp.

41 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Blades –Three or more teeth in contact with material TPI varies Setup –Adjust guidepost –Adjust speed Scroll Saw Blades and Setup

42 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Scroll Saw Operation Outside cut – Beveling, scroll cuts Interior cut – Pocket cuts – Blade threaded through hole in workpiece Patrick A. Molzahn

43 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Blade choice based on sawing operation Inspect blade frequently Blade performance based on tooth design, chip load –Chip load depends on number of teeth, size of gullet, speed of blade, rate of feed –Chip load is factor for all blade types, styles Selecting Blades

44 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Blade diameter Tooth design –Hook angle –Cutting edge shape –Number of teeth Kerf width Arbor hole size Circular Blade Selection

45 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Diameter – Defines tool size Hook angle – Angle between tooth face and line from tooth tip to arbor Cutting edge – Tooth shape or grinds Circular Blade Selection (Cont’d)

46 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Number of teeth –More teeth, smoother cut –Determines performance in thin materials Kerf width –Larger diameter blades create larger kerfs Arbor hole –Larger on blades with larger diameter Circular Blade Selection (Cont’d)

47 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Other considerations – Gullet – Flat, hollow ground, or thin rim blades – Expansion slots Circular Blade Selection (Cont’d)

48 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Loop length Blade width Hardness Tooth shapes, blade set Blade material Band Saw Blade Selection

49 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Standard blades cut in one direction Width, TPI vary Beveled teeth, alternate set Standard length 5 ″ Scroll Saw Blade Selection

50 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Keep sharp, free of rust and resin, teeth intact Inspect blades frequently for cracks, warp, missing teeth Clean with solvents Carbide-tipped blades need professional sharpening Maintaining Saw Blades

51 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Inspect Clean Adjust Lubricate Disconnect from power, lock out before servicing Maintaining Power Saws

52 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Ensure miter gauge slot and blade parallel Check fence alignment Adjust using dial indicator Lubricate handwheels Ensure belts tracking correctly Keep motors free of sawdust Keep table free of rust Table Saw Maintenance

53 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Table Saw Maintenance

54 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Radial Arm Saw Maintenance Lubricate all moving parts Check table and fence alignments Level table Patrick A. Molzahn

55 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Ensure proper blade tension Adjust blade tracking Adjust spacing between blade and side guide, thrust bearing Coil blade for storage Band Saw Maintenance Patrick A. Molzahn

56 Copyright Goodheart-Willcox Co., Inc. May not be posted to a publicly accessible website. Select proper blade guide and blade Set proper tension Check lubricating oil level Scroll Saw Maintenance


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