Jet JJ-8CS Owner's Manual

Also see for JJ-8CS: Operating instructions and parts manual

Contents

15Jointing Warped MaterialIf the work to be jointed is cupped or warped, takelight, repetitive cuts until the surface is flat. Forc-ing the material flat against the table will still leavea warped piece after the cuts have been made. WARNINGNever joint any material shorter than eightinches!The material may tip into the jointer’s throatand be kicked back!Avoid jointing thin material which couldbecome jammed under the fence or bladeguard!Failure to comply may cause serious injury!Direction of GrainFeed the material with of the grain to avoid tearout(Fig. 23). If the direction of the grain changes some-where in the board, try reducing depth of cut andslow the feed speed down to avoid tearout. If re-sults still aren’t satisfactory, turn the material aroundand try feeding through the other way.Bevel CutTo cut a bevel, lock the fence at the desired angleand run the material through, pressing the workfirmly against the fence and tables (Fig. 24). Sev-eral passes may be necessary for the desired re-sult.Taper Cut WARNINGTaper cuts require the removal of thecutterhead guard. Use extreme cautionwhen making taper cuts and replace theguard immediately after completion!Failure to comply may cause serious injury!One of the most useful jointer operations is cuttingan edge to a taper. This method can be used on awide variety of work; tapered legs of furniture is acommon example.Instead of laying the piece down on the infeed table,lower the forward end of the work onto the outfeedtable. Use caution, however, as the piece will spanFig. 23the knives, and they will take a “bite” from the workwith a tendency to kick back unless the piece isheld firmly. Push the work forward as in ordinaryjointing. The effect is to plane off all the stock infront of the knives to an increasing depth, leaving atapered surface.The ridge left by the knives when starting the tapermay be removed by taking a very light cut in theregular jointing procedure, with the infeed tableraised to its normal position.Practice is required in this operation. Beginnersare advised to make trial cuts with scrap material.Fig. 24