Jet HVBS-712V Operating Instructions And Parts Manual

Jet HVBS-712V Operating Instructions And Parts Manual Manual pdf 17 page image

173. Position workpiece in vise and tighten vise.Workpiece should be fitted directly between thejaws without adding other objects. When workpiece is profiled section, flat piece or specialshape, refer to examples in Figure 9-1 forproper clamping positions. The top row showsacceptable clamping positions, the bottom rowshows unacceptable positions.If the thickness of profile section is very thin, apiece which duplicates the profile should befitted inside the workpiece itself, to preventworkpiece being crushed between the jaws.Do not load/unload materialfrom vise while machine is running. Never holdworkpiece by hand when cutting; workpiecemust be firmly secured in vise. Do not reach intocutting area during cutting operations.Figure 9-1: clamping positions4. Adjust left blade guide to minimize exposedblade area.5. Set suitable feed rate on cylinder dial.6. Open coolant valve, and open valve onhydraulic cylinder to allow bow to descend ingradual and controlled manner.7. Switch trip tab must turn off saw at completionof cut.9.3 Evaluating cutting efficiencyIs the blade cutting efficiently? The best way todetermine this is to observe the chips formed by thecutting blade.If chip formation is powdery, then the feed rate ismuch too light, or the blade is dull.If chips formed are curled, but colored — that is,either blue or straw-colored from heat generatedduring the cut — then the feed rate is too high.If chips are slightly curled and are not colored byheat – the blade is sufficiently sharp and is cuttingat its most efficient rate.10.0 User-maintenanceAlways disconnect power tomachine before performing maintenance.Failure to do this may result in serious personalinjury.Keep all surfaces clean and free of rust, slag, chips,and coolant build-up.Clear metal particles with a small paint brush orparts cleaning brush. Do not use compressed air, asit may force chips into the guide bearings and othercritical areas of the saw.Clean drain filter assembly.Make frequent inspections of motor fan, and blowout (with low pressure air hose) or vacuum anyaccumulation of foreign material to maintain normalmotor ventilation.Wipe saw down with a clean, dry cloth, and oil allunpainted surfaces with light machine oil.Keep blade guides clean and free of metal particles.Check guide bearings frequently to make sure thatthey are properly adjusted and turning freely.Periodically inspect belt for wear or fraying. Replaceif needed.To prevent corrosion of machined surfaces when asoluble oil is used as coolant, pay particularattention to wiping dry the surfaces where fluidaccumulates and does not evaporate quickly, suchas between machine bed and vise.Place a thin coat of oil on bed surface on which visejaw slides.If the power cord is worn, cut, or damaged in anyway, have it replaced immediately.10.1 LubricationAll ball bearings are permanently lubricated andsealed. They require no further lubrication.Lubricate the vise lead screw as needed with #2tube grease.Drain and refill gear box oil after first 90 days ofoperation. Thereafter, change every six months.Use 90W oil.To change gear box oil:1. Disconnect machine from power source.2. Place bow in horizontal position.3. Remove control box and bracket to exposegearbox (Figure 10-1).4. Remove the four screws from gear box andremove cover plate and gasket.