Powermatic PWBS-14CS operating instructions Resawing, Blade Lead

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Resawing

Resawing is the process of slicing stock to reduce its thickness, or to produce boards that are thinner than the original workpiece, such as veneers.

The ideal blade for resawing is the widest one the machine can handle, as the wider the blade the better it can hold a straight line.

Resawing can be performed using the rip fence or the resaw guide. When using the rip fence, use a push block, push stick, or similar device to keep your hands away from the blade. The resaw guide offers a pivot point by which you can carefully follow your layout line; it is especially useful for sawing curves, when the fence can’t be used and it’s difficult to control the cut freehand.

Figure 60 demonstrates resawing with the rip fence; Figure 61, with the resaw guide.

Figure 60

Figure 61

Blade Lead

Blade lead, or drift, is when the blade begins to wander off the cutting line even when the band saw rip fence is being used. Figure 62 shows an example of blade lead.

It is more common with small, narrow blades, and is almost always attributable to poor blade quality, or lack of proper adjustments. Inspect the band saw for the following:

Fence is not parallel to miter slot and blade.

Blade is not tensioned correctly.

Blade is dull.

Teeth have too much “set” on one side of the blade.

Workpiece is being fed too quickly.

Figure 62

If the blade is suspect, but replacing it is not currently an option, the blade lead can be temporarily compensated for by skewing the fence:

1.Cut a scrap piece of wood about the same length as the band saw table, and joint one edge along its length, or rip it on a table saw to give it a straight edge.

2.Draw a line on the board parallel with the jointed, or straight edge of the board.

3.Move the band saw fence out of the way, and carefully make a freehand cut along your drawn line on the board. Stop about midway on the board, and shut off the band saw (allow the blade to come to a complete stop) but do not allow the board to move.

4.Clamp the board to the table.

5.Loosen the four hex cap screws on the fence and slide the fence over, lining it up against the board. Lock the fence down.

6.Re-tighten the four hex cap screws.

NOTE: Skewing the fence to correct blade lead is effective for that particular blade; when a new blade is installed, the fence will need re- adjustment and re-squaring to miter slot. See appropriate sections in this manual.

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Contents Powermatic Part No. M-1791216Warranty and Service Warranty PeriodTable of Contents Parts List Table and Trunnion Assembly Page Introduction Features and Specifications Disconnect the machine from the power source Grounding InstructionsVolt Operation Extension Cords Recommended Minimum Gauge AWG of Extension CordsContents of the Shipping Container UnpackingCarton #2 Stand Installation and Assembly Mounting Band Saw to StandRefer to Figures 15 Installing Drive Belt Refer to Figures 17 throughInstalling Trunnion Support Installing Extension TableInstalling Main Table Installing Rear Rail Leveling the Extension TableRefer to Figures 22 Installing Front Rail and Rip Fence Refer to Figures 29Aligning Fence to Blade Work Lamp Resaw GuideBlower Nozzle Refer to Figures 33Stand Attachments Installing Quick Tension LeverRiser Block Accessory Dust CollectionTilting the Table AdjustmentsAdjusting 90 Table Stop Refer to Figures 39Installing Blades Table Aligned with BladeBlade Tension Blade Tracking Guide Post and Upper Blade GuardRefer to Figures 47, 48 Upper Bearing GuidesLower Bearing Guides Thrust BearingMiter Gauge Refer to Figures 51Maintenance On/Off SwitchPitch Blade SelectionWidth ShapeSet MaterialBlade Breakage Ripping General ProcedureOperation CrosscuttingResawing Blade LeadTrouble Probable Cause RemedyTroubleshooting Operating Problems Trouble Optional Accessories Trouble Probable Cause RemedyBlade Selection Guide For Radius CuttingReplacement Parts Parts List Body AssemblyIndex No. Part No Description Size Qty Serial # 71210381 and higher Index No. Part No Description Size Qty Body Assembly Parts List Closed Stand Assembly 200MF 125VACClosed Stand Assembly Parts List Fence and Rail Assembly PWBS14-FAFence and Rail Assembly Parts List Table and Trunnion Assembly Parts List Miter Gauge Assembly Parts List Blade Tension Lever Electrical Connections for PWBS-14CS