Assessments - 3, GPA: 4.3
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2. Make sure all tools and objects used during setup are cleared away from the machine. 3. Connect the machine to the power source. 4. press the main power switch ON. emergency stop button pops out, the switch is reset and ready for operation (see figure 10). To Reset Twist Button Switch... Clockwise figure 10. resetting the switch. 6. Verify that the main motor is operating correctly by switching the spindle rotation dial to "F" (forward). —When operating correctly, the machine runs smoothly with little or no vibration or rubbing noises. —investigate and correct strange or unusual noises or vibrations before operating the machine further. Always disconnect the machine from power when investigating or correcting potential problems. 7. press the emergency stop button to stop the machine and switch the spindle rotation dial to "0" (neutral). 8. Without resetting the emergency stop button, switch the spindle rotation dial to "F". the machine should not start. —if the machine does not start, the oFF button safety feature is working correctly. the test run is complete. —if the machine does start (with the stop button pushed in), immediately disconnect power to the machine. the oFF button safety feature is not working correctly. this safety feature must work properly before proceeding with regular operations. Call tech support for help. -14 g0484 gear head Mill/drill break-In After successfully completing the Test Run, it is necessary run the mill/drill in each speed and direction without a load to seat the bearings. NOTICE Only change spindle speed when the spindle is stopped. Attempting to change spindle speeds when the spindle is in motion will damage the drive gears and bearings. To perform the break-in procedure: 1. press the emergency stop button in and make sure the spindle is stopped. 2. use the gearbox levers so that the spindle rpM is set at 120. 3. twist the emergency stop button clockwise so that it pops out. 4. switch the spindle rotation dial to "F" (forward) and let the spindle run for 10 minutes. 5. press the emergency stop button in and wait for the spindle to stop. 6. switch the spindle rotation dial to "r" (reverse) and let the spindle run for 10 minutes. 7. repeat Steps 2–6 for the remaining rpM ranges. -15 g0484 gear head Mill/drill SEcTION 4: OpERATIONS Operation Safety Damage to your eyes and lungs could result from using this machine without proper protective gear. Always wear safety glasses and a respirator when operating this machine. Loose hair and clothing could get caught in machinery and cause serious personal injury. Keep loose clothing and long hair away from moving machinery. NOTICE If you have never used this type of machine or equipment before, WE STRONGLy REc- OMMEND that you read books, trade magazines, or get formal training before beginning any projects. Regardless of the content in this section, Grizzly Industrial will not be held liable for accidents caused by lack of training. control panel A. power Lamp: glows when power is flowing to the machine. b. Headstock up button: Controls the headstock motor so the headstock is powerfed upwards. c. Headstock Down button: Controls the headstock motor so the headstock is power- fed downwards. D. Emergency Stop button: stops the mill/ drill. rotate the button clockwise until it pops back out to reset it. E. Master power Switch: toggles main power to the machine. f. Spindle Rotation Dial: Changes spindle rotation direction for milling/drilling operations. spindle rotation must always be stopped before making direction changes. A E d C F B figure 11. Control panel. -16 g0484 gear head Mill/drill Spindle Height control spindle height is changed by unlocking the quill lock lever and the fine feed knob, and using the quill feed handles or the fine feed knob (figure 12). the spindle scale indicates the spindle height in inches and millimeters. To change the spindle position: 1. unlock the quill lock lever and loosen the fine feed lock knob. 2. pull down on the quill feed levers to lower or raise the spindle. Lock the quill lock to hold the spindle in a particular position if you choose. 3. tighten the fine feed lock knob and use the fine feed knob if you like. Tip: Milling with the quill fully extended, can cause tool chatter. For maximum spindle rigidity when milling, keep the spindle retracted into the headstock as far as possible, lock the headstock and quill lock levers, and tighten the fine feed lock knob. figure 12. spindle controls. Quill Feed Lever Quill Lock Lever Fine Feed Knob spindle scale Fine Feed Lock Knob Table Travel (X-Axis and y-Axis) Longitudinal feed the longitudinal feed, or X-axis, is moved by the handwheel at the right end of the table. the handwheel will move the table in both directions side-to-side. one complete revolution of the handwheel moves the longitudinal feed 0.100". there is also a scale on the front of the table for use when a tight tolerance is not required. cross feed the cross feed, or y-axis, is mo...