Jet Tools VBS-3612 operating instructions Troubleshooting Welded Blade Inspection

Page 28

Troubleshooting – Welded Blade Inspection

Trouble

Weld is misaligned.

Misaligned weld: Blade ends are overlapped.

Weld breaks when used.

Incomplete weld.

Brittle weld.

Probable Cause

Remedy

 

 

Dirt or scale on clamp jaws or blade.

Always keep jaws clean. Clean blade

before welding.

 

 

 

 

Before welding, grind cut edges of the

Blade ends not square.

blade until they are square. Use the

shear on the band saw for square

 

 

cuts.

 

 

Blade ends not correctly aligned when

Align the ends properly before

clamped in jaws.

clamping.

 

 

Worn clamp jaws

Replace clamp jaws.

 

 

Clamp jaws not aligned correctly.

Align jaws correctly.

 

 

Pressure knob is set for wider blade

Adjust the pressure knob correctly for

than the one used.

particular blade width.

 

 

Blade ends or clamp jaws not aligned

Make corrections as needed.

correctly.

 

 

 

Weld is weak and incomplete;

Cut and re-weld the blade ends.

possible “blow holes” (see Figure 19).

 

 

 

Weld has been ground too thin.

Cut and re-weld the blade ends.

 

 

Weld is not annealed correctly.

Follow annealing instructions on page

18.

 

 

 

Pressure knob not set correctly.

Make appropriate adjustment

 

 

Improper clamping procedures.

Follow instructions on pages 16

through 19.

 

 

 

Limit switch (#1, page 39) not

Adjust limit switch correctly.

adjusted correctly.

 

 

 

Defective limit switch; doesn’t break

Replace limit switch.

circuit at end of welding operation.

 

 

 

Clamp jaw movement obstructed by

Bend cable and untangle wires.

kinked jaw cable or tangled wires.

 

 

 

Incorrect annealing heat.

Bring weld up to correct color (see

page 18).

 

 

 

Scale or oil on weld caused poor

Keep clamp jaws and blade clean.

annealing.

 

 

 

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Contents Inch Metalworking Band Saw Warranty and Service More InformationTable of Contents Page Page Introduction Specifications Features and Terminology Contents of the Shipping Container UnpackingInstallation and Assembly FenceFeed Screw ShearGrounding Instructions Volt, Three Phase OperationExtension cords Adjustments Converting from 230 Volt to 460 Volt Three PhaseThree-Phase Test Run Blade Removal and InstallationBlade Tension Blade TrackingGuide Post Blade GuidesAuxiliary Table Squaring Work Table with BladeReplacing Drive Belts Blade Break-In Procedure Setting Blade SpeedBand Saw Operation Work Lamp BulbEvaluating Cutting Efficiency Welder OperationShearing Removing Teeth WeldingAnnealing Blade Selection WidthPitch GageShape Material SetBlade Breakage Maintenance Machine Part Lubricant FrequencySpeed and Pitch Chart Typical Band Saw Operations Troubleshooting Operating Problems Troubleshooting Mechanical and Electrical Problems Trouble Probable Cause Remedy Troubleshooting Welded Blade Inspection Troubleshooting Welder Mechanical Problems Replacement PartsIndex No. Part No Description Size Qty TS-0561021 TS-0051051 VBS3612-1174 TS-0267061 VBS-3612 Band Saw VBS-3612 Band Saw JWG34-601 PR-EV-6280 Welder, Shear and Work Lamp Assemblies Electrical Connections 3Ph, 230/460V SB1 Electrical Box Page WMH Tool Group