Grizzly g0748, g0747 Grounding Instructions, Extension Cords, Minimum Gauge Size 14 AWG, 50 ft

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Grounding Instructions

This machine MUST be grounded. In the event of certain malfunctions or breakdowns, grounding reduces the risk of electric shock by providing a path of least resistance for electric current.

the power cord and plug specified under “Circuit requirements for 220V” on the previous page has an equipment-grounding wire and a ground- ing prong. the plug must only be inserted into a matching receptacle (outlet) that is properly installed and grounded in accordance with all local codes and ordinances (see figure below).

GROUNDED

15-15 RECEPTACLE

15-15 PLUG

Current

Carrying

Grounding Prong Prongs

Figure 1. Typical 15-15 plug and receptacle.

Serious injury could occur if you connect the machine to power before completing the setup process. DO NOT connect to power until instructed later in this manual.

No adapter should be used with the required plug. If the plug does not fit the available receptacle, or the machine must be reconnected for use on a different type of circuit, the reconnection must be made by a qualified electrician and comply with all local codes and ordinances.

Serious injury could occur if you connect the machine to power before completing the setup process. DO NOT connect to power until instructed later in this manual.

Improper connection of the equipment-grounding wire can result in a risk of electric shock. The wire with green insulation (with or without yellow stripes) is the equipment-grounding wire. If repair or replacement of the power cord or plug is nec- essary, do not connect the equipment-grounding wire to a live (current carrying) terminal.

Check with a qualified electrician or service per- sonnel if you do not understand these grounding requirements, or if you are in doubt about whether the tool is properly grounded. If you ever notice that a cord or plug is damaged or worn, discon- nect it from power, and immediately replace it with a new one.

Extension Cords

We do not recommend using an extension cord with this machine. If you must use an extension cord, only use it if absolutely necessary and only on a temporary basis.

Extension cords cause voltage drop, which may damage electrical components and shorten motor life. Voltage drop increases as the extension cord size gets longer and the gauge size gets smaller (higher gauge numbers indicate smaller sizes).

Any extension cord used with this machine must contain a ground wire, match the required plug and receptacle, and meet the following require- ments:

Minimum Gauge Size

14 AWG

Maximum Length (Shorter is Better)

50 ft.

Model G0747/G0748 (Mfg. Since 8/12)

-15-

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Contents For models manufactured since 8/12 Page Table of Contents Wiring Contact Info IntroductionMachine Description Manual Accuracy Front View Identification Model G0747 Headstock Identification Model G0748 Headstock Identification Machine Data Sheet Main Specifications Operation Info Model G0748 Vertical Mill Variable Speed Variable Safety Instructions for Machinery SafetyPage Additional Safety for Milling Machines Availability Power SupplyFull-Load Current Rating Circuit Requirements forExtension Cords Grounding InstructionsMinimum Gauge Size 14 AWG 50 ftUnpacking SetupNeeded for Setup Small Item Inventory Figure Qty InventoryBasic steps for removing rust preventative CleanupBefore cleaning, gather the following Site Considerations To lift and move the mill Lifting & PlacingHEAVy Lift Leveling Leveling & MountingBolting to Concrete Floors Machine MountsTo assemble the mill AssemblyInitial Lubrication Mill Test Run Test RunTo test the power feed Power Feed Test RunSpindle Break-In Inspections AdjustmentsTo perform the spindle break-in procedure Operation Overview OperationsTable Locks Table MovementGraduated Index Rings Axis Power Feed Identification To operate the X-axis power feed Axis Power Feed OperationHead Movement Tool Needed QtyRotating Head Left/Right Tilting Head Forward/BackwardRotating Ram Ram MovementMoving Ram Forward/Backward Determining Spindle Speed Spindle SpeedRecommended Cutting Speed FPM x Tool Diameter in inches xTo set the Model G0747 spindle speed Setting Model G0747 Spindle SpeedLow Spindle Speed Range To set the Model G0748 spindle speed Setting Model G0748 Spindle SpeedDownfeed Controls Spindle DownfeedTo use the coarse downfeed Coarse DownfeedFine Downfeed To use the auto-downfeed Auto-DownfeedModel G0747 brake lever G0748 Brake Lever Spindle BrakeLoading Tooling Loading/Unloading ToolingUnloading Tooling Tools Needed QtyG1076-52-PC. Clamping Kit AccessoriesG9299-10 Yuasa-Type Rotary Table G7155-6 Precision Milling ViseSchedule MaintenanceCleaning Protecting Quill LubricationHeadstock Gearing Table Ways One-Shot OilerTable Elevation Leadscrew Ram WaysHead Tilt & Ram Pinions To lubricate the power feed gears Power Feed GearsMachine Storage Symptom Possible Cause Possible Solution ServiceTroubleshooting Symptom Possible Cause Possible Solution Saddle gib and adjustment screw Knee Gib Adjustment Screw Adjusting GibsAxis Leadscrew Backlash Adjusting Leadscrew BacklashCross Leadscrew Backlash To tram the spindle to the table Tramming SpindlePage Wiring Safety Instructions WiringG0747 Wiring Diagram G0748 Wiring Diagram Main PartsDescription Main Parts ListDescription Axis LeadscrewsDownfeed System Downfeed System Parts List CAM ROD Sleeve Assembly G0747 Headstock PFH30M Flat HD SCR M5-.8 X G0747 Headstock Parts ListG0748 Headstock G0748 Headstock Parts List Headstock Front COVER, Aluminum One-Shot Oiler Accessories G0747 Machine Labels & Cosmetics G0748 Machine Labels & Cosmetics Model G0747/G0748 Mfg. Since 8/12 Comments Warranty CardBOX BELLINGHAM, WA Grizzly INDUSTRIAL, INCWarranty & Returns