Jet HVBS-712 Operating Instructions And Parts Manual

Jet HVBS-712 Operating Instructions And Parts Manual Manual pdf 20 page image

2011.2 Operational problemsSymptom Possible Cause CorrectionCuts not square. Blade not square to vise/material. Adjust vise square to blade.Blade surface not perpendicular totable.Adjust blade guides until perpendicular.Workpiece shifting in vise. Properly secure workpiece by tighteningvise handles. If irregular-shaped workpiece,use appropriate clamping technique or jig.Low blade tension. Increase tension.Blade guides out of adjustment. Adjust blade guides.Blade is worn, cutting crooked. Replace blade.Feed pressure too great. Reduce feed pressure.Blade guides incorrectly set. Readjust guide assemblies.Incorrect blade toothing in relation toworkpiece.Check Machinery’s Handbook forrecommended blade type.Miter cuts not accurate. Improper setting of vise jaws. Use adjustable square or protractor toverify angle settings.Blade worn; cutting crooked. Replace blade.Premature dulling ofblade teethImproper blade break-in. Follow proper break-in procedure.Excessive blade speed, blade teethoverheating.Decrease speed.Inadequate feed rate. Adjust cylinder dial setting as needed.Improper tooth pitch for material. Use proper blade.Hard spots or scale on material. Scale: reduce speed and increase feedrate. Hard Spots: increase feed rate.Work hardening of material (especiallystainless steel).Increase feed rate.Blade installed backwards. Remove blade and twist inside-out.Insufficient blade tension. Adjust as needed.Finished surface ofworkpiece is rough,unsatisfactory.Improper blade break-in. Follow proper break-in procedure.Improper speed or feed rate. Adjust as needed.Dull or damaged teeth. Replace blade.Poor weld on blade. Replace or re-weld blade.Incorrect choice of blade. Check a machinist’s handbook for bladerecommendations.Excessive bladebreakage.Incorrect blade tension. Adjust accordingly.Incorrect blade speed or downfeedrate.Adjust accordingly.Workpiece loose in vise. Clamp workpiece securely.Blade rubs on wheel shoulder. Adjust blade tracking.Teeth too coarse for material. Use appropriate blade for material.Teeth in contact with workpiecebefore saw is started.Blade must be running before contact withworkpiece.Blade guides misaligned. Adjust blade guides.Blade too thick for wheel diameter. Use thinner blade.Cracking at weld; poor annealing ofblade.Replace blade.