Hafco BM-53VE Operation Manual

Hafco BM-53VE Operation Manual Manual pdf 15 page image

15OPERATION MANUALSETTING BM-23A SPINDLE SPEEDThe Model BM-23A has eight spindle speeds—fourin low motor speed and four in high motor speed.Setting the spindle speed involves: 1) Selectingthe spindle speed range, 2) positioning the V-belt,and 3) setting the spindle switch.To Set The Spindle Speed:1. DISCONNECT MACHINE FROM POWER!2. Use chart below or spindle speed chart onheadstock to find appropriate spindle speedfor your operation (see Fig. 4.2).RangeLeverFig. 4.33. Pull the spindle speed range selector knob (seeFig. 4.3) out, position either in HIGH or LOW range,then release knob to seat knob pin in detent.NOTE: If it is difficult to move range selectorknob, rotate spindle by hand to help mesh thegears until selector moves freely.Fig. 4.24. Lever 1 is shown in Fig. 4.4 in the HIGH or LOWpositionBeltCoversNOTE: If this step was not successful, use HIGHLOWrange lever (Lever 2 Fig. 4.4) to reset speed range,then repeat this step until you are certain that spin-dle is seated into spindle clutch.5. Remove belt housing side covers on either side ofhead to expose V-belt and pulleys, as shown inFig. 4.3.6. Loosen two motor lock levers, one on eachside of head, then pull belt tension adjustmentlever forward to release V-belt tension(see Fig. 4.3).7. Refer to spindle speed chart on front of headstock(see Fig. 4.2), and position V-belt on pulleys for de-sired spindle speed.8. Push adjustment lever backward with moderateforce to re-tension V-belt, then re-tighten two locklevers to secure motor9. Replace two belt housing side covers beforere-connecting mill to powerFig. 4.4Belt TensionLever