Ryobi TS1343L manual Cutting Crown Molding, Laying Molding Flat on the Miter Table, Ceiling Fence

Page 25

OPERATION

CUTTING CROWN MOLDING

The compound miter saw does an excellent job of cutting crown molding. In general, compound miter saws do a bet- ter job of cutting crown molding than any other tool made.

In order to fit properly, crown molding must be compound mitered with extreme accuracy.

The two contact surfaces on a piece of crown molding that fit flat against the ceiling and the wall of a room are at angles that, when added together, equal exactly 90°. Most crown molding has a top rear angle (the section that fits flat against the ceiling) of 52° and a bottom rear angle (the section that fits flat against the wall) of 38°.

LAYING MOLDING FLAT ON THE MITER TABLE

See Figure 32.

To use this method for accurately cutting crown molding for a 90° inside or outside corner, lay the molding with its broad back surface flat on the miter table and against the fence.

When setting the bevel and miter angles for compound miters, remember that the settings are interdependent; changing one angle changes the other angle as well.

Keep in mind that the angles for crown moldings are very precise and difficult to set. Since it is very easy for these angles to shift, all settings should first be tested on scrap molding. Also most walls do not have angles of exactly 90°, therefore, you will need to fine tune your settings.

When cutting crown molding by this method the bevel angle should be set at 33.85°. The miter angle should be set at 31.62° either right or left, depending on the desired cut for the application. See the chart below for correct angle settings and correct positioning of crown molding on miter table.

The settings in the chart on page 25 can be used for cutting All Standard (U.S.) crown molding with 52° and 38° angles. The crown molding is placed flat on the miter table using the compound features of your miter saw.

52°

38°

W

A

L

L

CEILING

FENCE

TOP EDGE AGAINST FENCE = LEFT SIDE, INSIDE CORNER

RIGHT SIDE, OUTSIDE CORNER

MITER TABLE

INSIDE

CORNER

FENCE

OUTSIDE

CORNER

 

BOTTOM EDGE AGAINST FENCE =

RIGHT SIDE, INSIDE CORNER

LEFT SIDE, OUTSIDE CORNER

MITER TABLE

CROWN MOLDING FLAT ON MITER TABLE

Fig. 32

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Image 25
Contents Save this Manual for Future Reference OPERATOR’S ManualIntroduction WarrantyRead ALL Instructions General Safety Rules Blade Coasts After Being Turned OFF  Before Making a CUT, be Sure ALL ADJUST- Ments are Secure Specific Safety RulesSpecific Safety Rules Symbol Signal Meaning SymbolsDouble Insulation ElectricalElectrical Connection Extension CordsGlossary of Terms Product Specifications FeaturesAMP Motor Know Your Compound Miter SAWBevel Lock Knob Blade Wrench StorageTools Needed AAA Batteries Dust BAG Blade Wrench Loose PartsUnpacking AssemblyMounting Holes Trace HolesWork Clamp Dust BAGTighten Miter Dust BAG Exhaust PortAligning the Laser Guide Line Installing Batteries in LaserBatteries Compartment Cover Screw Laser Line See Figures 13 To Install / Replace the BladeSee Figures 15 Squaring the Miter Table to the FenceView of Miter Table Square with Fence Socket Head Screws Fence Squaring the SAW Blade to the FenceSee Figures 18 Framing Square Miter Tablemiter Lock HandleSquaring the Blade to THE MITER Table Indicator Screw Blade Scale IndicatorbevelCombination Square Miter Table Miter Lock Handle See Figures 22Applications OperationTo Cross CUT Cross CUTSee Figures 27 To Bevel CUTBevel Bevel CUTSee Figures 29 To Compound Miter CUTCompound Miter CUT Work Clamp45 X 45 Compound Miter CUT Long Workpiece Workpiece Supports To Support Long WorkpiecesCutting Compound Miters COMPOUND-ANGLE Settings for Popular StructuresPitch Number of Sides Laying Molding Flat on the Miter Table Cutting Crown MoldingCeiling Fence Right SIDE, Outside Corner Miter Table Inside FenceClamping Wide Workpieces Cutting Warped MaterialSee Figures 33 WrongPivot Adjustments Travel Pivot Adjustment AdjustmentsBevel Pivot Adjustment Positive Stop AdjustmentsLaser Adjustment Screw To Adjust the Laser GuideGeneral Maintenance MaintenanceBrush Replacement CAP Brush AssemblyService Model NO. and Serial no