Southbend SB1024, SB1026, SB1025 Fine Downfeed Controls, Using the Fine Downfeed Handwheel

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For Machines Mfg. Since 8/09

O P E R A T I O N

SB1024/SB1025/SB1026

Fine Downfeed Controls

There are a number of devices on the head that are used with the fine downfeed handwheel or the auto-downfeed system. Refer to Figure 41 and the descriptions below to become familiar with these controls.

A

I H

B

C G

D

F

E

Figure 41. Fine downfeed controls.

A.Auto-Downfeed Rate Selector: Selects one of the three auto-downfeed rates.

B.Fine Downfeed Handwheel: Manually controls fine spindle downfeed.

When the spindle rotation is reversed, either by changing the spindle speed range or by using the spindle direction switch, the direction of spindle auto-downfeed will reverse.

C.Auto-Downfeed Direction Pin: Starts, stops, and reverses the auto-downfeed direction.

D.Fine Downfeed Clutch Lever: Engages the fine/auto-downfeed gears.

E.Downfeed Scale: Used with the quill dog, shows the depth of spindle downfeed in inches.

F.Quill Lock Lever: Secures the quill in place for increased stability during operations.

G.Downfeed Stop & Locking Wheel: Sets the depth of spindle downfeed. The stop is threaded into position, then the locking wheel is use to secure it in place.

H.Quill Dog: Moves with the quill and spindle and disengages the downfeed clutch lever when it engages either the top or the downfeed stop.

I.Downfeed Selector: Sets the mill for manual downfeed or auto-downfeed control.

Using the Fine Downfeed

Handwheel

1.Make sure that the spindle rotation is turned OFF and the spindle is at a complete stop.

2.To set the downfeed for manual control, pull the downfeed selector knob out, then rotate the selector clockwise until the selector pin seats in the forward manual (disengaged) position.

3.Set the auto-downfeed direction pin in the neutral (middle) position to disengage the fine downfeed handwheel from the auto- downfeed gears.

4.Position the downfeed stop for the spindle depth that is correct for your operation, then secure it in place with the locking wheel.

5.Use the coarse downfeed lever to lower the spindle slightly until you can pull the clutch lever out to the left and it locks in place. This will engage the handwheel with the quill and spindle.

6.To lower the spindle, rotate the fine downfeed handwheel. When the quill dog meets the downfeed stop, the clutch lever will disengage and the spindle will return to the top.

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Contents 42 Milling Machine Manual Feedback UpdatesCustomer Service Scope of ManualTable of Contents Parts Capabilities FeaturesAbout These Machines ForewordIdentification-front view Model SB1024 shown Front View IdentificationModel SB1024 belt housing and headstock identification Model SB1024 Belt Housing Headstock IdentificationModel SB1025/SB1026 Belt Housing Headstock Identification Machine Specifications Model SB1024 42 Variable Speed Milling Machine Power FeedTable Information Model SB1025 42 Milling Machine Power Feed 80, 140, 220, 325 RPM Model SB1026 42 Milling Machine Power Feed High Range of Spindle Speeds Understanding Risks of Machinery Basic Machine SafetyF E T Y Additional Milling Machine Safety Things Youll Need Preparation OverviewInventory UnpackingBasic steps for removing rust preventative Cleaning & ProtectingBefore cleaning, gather the following Location To lift and move the mill Lifting & MovingLeveling Leveling & MountingBolting to Concrete Floors Knee Crank AssemblyTo install the ball handles Ball HandlesWay Covers Front way cover installedSB1026 Power ConnectionSB1025 220V 3-Phase SB1024To test run the machine Initial LubricationTest Run To test the X-axis power feed unit and table limit switch Spindle Break-In Inspections AdjustmentsTo perform the spindle break-in procedure A typical milling operation, the operator does the following Operation OverviewTable Movement Control PanelTable Locks Graduated Index RingsTo operate the X-axis power feed Axis Power FeedTilting Head Head MovementTramming Spindle Rotating HeadTools Needed Qty To tram the spindle to the tablePlace the parallel block directly under Rotating Ram Ram MovementMoving Ram Back-and-Forth Determining Spindle Speed Setting Spindle SpeedSetting Spindle Speed Range Model SB1024 Spindle Speed Ranges Setting SB1024 Spindle Speed RangeModel SB1025 Spindle Speed Ranges Setting SB1025/SB1026 Spindle Speed RangeMeshing Spindle & Spindle Clutch Setting SB1024 Spindle Speed Setting Spindle SpeedF2/R2 Setting SB1025/SB1026 Spindle SpeedDownfeed Controls Using the Coarse Downfeed HandleManual Disengaged Position Auto-Downfeed Engaged Position Fine Downfeed Controls Using the Fine Downfeed HandwheelTo use the auto-downfeed system Using the Auto-Downfeed System= 0.006 in./rev = 0.0015 in./rev = 0.003 in./rev Spindle BrakeUnloading Tooling Loading/Unloading ToolingLoading Tooling Daily, After Operations Maintenance ScheduleBefore Beginning Operations OngoingLubrication Month/YearUnpainted & Machined Surfaces CleaningLubrication Table Ways One-Shot Oiler QuillHeadstock Gearing Speed Range Bearing Sleeve SB1024 OnlyHead & Ram Rack & Pinion Gear Power Feed GearsTo lubricate the power feed gears Ram WaysPower feed ball handle removed Drive Gear Bevel Gear Hazards Cleaning Coolant ReservoirCleaning To clean out the coolant reservoirLubrication section beginning on Machine StorageDisconnect Mill from Power Before Adjusting the Gibs Adjusting GibsLongitudinal Leadscrew Backlash Adjusting Leadscrew BacklashBall handle, rings, and key removed from Cross leadscrew Cross Leadscrew BacklashSymptom Possible Cause Possible Solution TR O U B L E S H O OTI N G Electrical Safety Instructions Wiring Diagram Color KEY Wiring OverviewBox, See SB1024/SB1026 Electrical BoxControl Panel Viewed From Behind See Figure SB1024/SB1026 Electrical ComponentsMotor junction box SB1024/SB1026 Electrical Component PicturesSB1025 Electrical Box SB1025 Electrical Components SB1025 Motor junction box SB1025 Electrical Component PicturesHeadstock Description Headstock Parts ListReverse Trip Ball Lever Quill SB1024 Gearbox Description SB1024 Gearbox Parts ListSB1025/SB1026 Gearbox SB1025/SB1026 Gearbox Parts List SB1024 Belt Housing SB1024 Belt Housing Parts List SB1025/SB1026 Belt Housing CAM Ring Screw M6-1 X SB1025/SB1026 Belt Housing Parts ListRam Ram Parts List 668 Saddle GIB Column, Knee, & Saddle Parts List709 Leadscrew NUT Bracket Table Parts ListC D E F G H One-Shot OilerElectrical Box SB1024/SB1026 Electrical Box & Control PanelControl Panel SB1025 Electrical Box & Control PanelAccessories SB1024 Head Machine Labels 220V 1PH Label SB1024 Main Machine LabelsSB1025/SB1026 Machine Labels Page R R a N T Y Southbendlathe.com