Grizzly g0747, g0748 owner manual Tramming Spindle, To tram the spindle to the table

Page 56

Tramming Spindle

After positioning the head at an angle and when your operation requires that the spindle axis be precisely perpendicular to the table, you must tram or align the spindle with the table to ensure the spindle is exactly 90° to the table.

This procedure involves mounting a dial test indicator to the quill or spindle, rotating it around the table, and adjusting the spindle axis (Z-axis) 90° to the table X- and Y-axes, as illustrated in Figure 69.

Spindle

 

 

Z-Axis

Y-Axis

 

90º

90º

 

 

X-Axis

Table

Figure 69. Spindle Z-axis perpendicular to the

table X- and Y-axis.

We encourage you to research the many varia- tions of spindle tramming to find the one that works best for you. If you do not already have a preference for performing this operation, use the following widely-used procedure for accurately tramming the spindle to the table.

Keep in mind that all workpiece top surfaces are not exactly parallel with the table top. You may choose to tram the spindle to the top surface of the workpiece after it is mounted instead of that of the table.

Tools Needed

Qty

Dial Test Indicator

 

(with at least 0.0005" resolution)

.................. 1

Indicator Holder

 

(mounted on the quill/spindle)

1

Precision Parallel Block

 

(at least 9" in length)

1

-54-

 

Note: A precision-ground plate can be substi- tuted for the parallel blocks. Keep in mind that the farther the indicator point can be placed from the spindle axis, the more accurate the alignment measurements will be.

To tram the spindle to the table:

1.disCONNECT MILL FROM POWER!

2.prepare the mill for tramming by performing the following tasks:

•Verify the table is clean by running your hand over the top of it. If necessary, stone the table to remove all nicks and burrs, then clean off all debris.

•position the table for the milling operation you intend to perform after tramming— preferably centered with the saddle.

•tighten any table, knee, quill, or ram locks that should be tight during the intended milling operation.

3.place the parallel block underneath the spin- dle.

4.install the indicator holder in the spindle or on the quill, then mount the indicator so that the point is as parallel to the block as possible (see the illustration in Figure 70).

Indicator Holder

 

 

 

 

 

Dial Test

 

 

 

 

 

Spindle

 

 

 

 

 

Indicator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Parallel Block

Table

Figure 70. Dial test indicator mounted.

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

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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 Safety Instructions for MachineryPage Additional Safety for Milling Machines Power Supply AvailabilityFull-Load Current Rating Circuit Requirements forGrounding Instructions Extension CordsMinimum Gauge Size 14 AWG 50 ftUnpacking SetupNeeded for Setup Inventory Small Item Inventory Figure QtyBasic steps for removing rust preventative CleanupBefore cleaning, gather the following Site Considerations To lift and move the mill Lifting & PlacingHEAVy Lift Leveling & Mounting LevelingBolting to Concrete Floors Machine MountsTo assemble the mill AssemblyInitial Lubrication Test Run Mill Test RunPower Feed Test Run To test the power feedSpindle Break-In Inspections AdjustmentsTo perform the spindle break-in procedure Operations Operation OverviewTable Locks Table MovementGraduated Index Rings Axis Power Feed Identification Axis Power Feed Operation To operate the X-axis power feedHead Movement Tool Needed QtyTilting Head Forward/Backward Rotating Head Left/RightRotating Ram Ram MovementMoving Ram Forward/Backward Spindle Speed Determining Spindle SpeedRecommended Cutting Speed FPM x Tool Diameter in inches xSetting Model G0747 Spindle Speed To set the Model G0747 spindle speedLow Spindle Speed Range Setting Model G0748 Spindle Speed To set the Model G0748 spindle speedSpindle Downfeed Downfeed ControlsTo use the coarse downfeed Coarse DownfeedFine Downfeed Auto-Downfeed To use the auto-downfeedSpindle Brake Model G0747 brake lever G0748 Brake LeverLoading/Unloading Tooling Loading ToolingUnloading Tooling Tools Needed QtyAccessories G1076-52-PC. Clamping KitG7155-6 Precision Milling Vise G9299-10 Yuasa-Type Rotary TableSchedule MaintenanceCleaning Protecting Lubrication QuillTable Ways One-Shot Oiler Headstock GearingTable Elevation Leadscrew Ram WaysHead Tilt & Ram Pinions Power Feed Gears To lubricate the power feed gearsMachine Storage Symptom Possible Cause Possible Solution ServiceTroubleshooting Symptom Possible Cause Possible Solution Adjusting Gibs Saddle gib and adjustment screw Knee Gib Adjustment ScrewAdjusting Leadscrew Backlash Axis Leadscrew BacklashCross Leadscrew Backlash Tramming Spindle To tram the spindle to the tablePage Wiring Wiring Safety InstructionsG0747 Wiring Diagram G0748 Wiring Diagram Parts MainMain Parts List DescriptionAxis Leadscrews DescriptionDownfeed System Downfeed System Parts List CAM ROD Sleeve Assembly G0747 Headstock G0747 Headstock Parts List PFH30M Flat HD SCR M5-.8 XG0748 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 Warranty Card CommentsGrizzly INDUSTRIAL, INC BOX BELLINGHAM, WAWarranty & Returns
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