Southbend SB1026, SB1025, SB1024 Using the Auto-Downfeed System, To use the auto-downfeed system

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SB1024/SB1025/SB1026

O P E R A T I O N

For Machines Mfg. Since 8/09

Using the Auto-Downfeed System

When using the auto-downfeed system, the spindle will move in the direction you choose with the auto-downfeed direction pin. When the quill dog reaches the top or meets the downfeed stop, the downfeed clutch lever will release. Then, if the spindle was traveling upward, the movement will simply stop. If the spindle was traveling downward, then the spindle will move back to the top at a rate controlled by the return spring on the left side of the head.

To use the auto-downfeed system:

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

2.To set the mill for auto-downfeed, pull the downfeed selector knob out, then rotate the selector clockwise and seat the pin in the rear auto-downfeed (engaged) position, as illustrated in Figure 42.

Auto-Downfeed (Engaged) Position

Figure 42. Downfeed selector in the auto-downfeed

(engaged) position.

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

4.Position the auto-downfeed direction pin for the spindle travel that is correct for your operation. It may be necessary to rock the fine downfeed handwheel back-and-forth to move the pin all the way in or out.

Note: The direction pin has three positions: 1) In for one downfeed direction, 2) middle for neutral or no movement, and 3) out for the reverse direction. The direction of spindle travel for the in and out positions is relative to the direction of spindle rotation. Keep in mind that spindle rotation and downfeed direction will reverse when the spindle speed range is changed.

5.Make sure the clutch lever is all the way to the right in the disengaged position so that the spindle will not travel when rotation is started.

Note: We recommend that you complete the remaining steps without a cutting tool installed, without a workpiece in place, and the table lower than the maximum spindle downfeed travel. This will enable you to test and confirm the settings before beginning the actual cutting operation.

To avoid damage to the system gearing, never use the auto-downfeed system with spindle speeds over 1860 RPM.

6.Set the mill for the correct spindle speed, then begin spindle rotation.

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Contents 42 Milling Machine Updates Customer ServiceScope of Manual Manual FeedbackTable of Contents Parts Features About These MachinesForeword CapabilitiesFront View Identiﬁcation Identification-front view Model SB1024 shownModel SB1024 Belt Housing Headstock Identiﬁcation Model SB1024 belt housing and headstock identificationModel SB1025/SB1026 Belt Housing Headstock Identiﬁcation Model SB1024 42 Variable Speed Milling Machine Power Feed Machine SpeciﬁcationsTable 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 Basic Machine Safety Understanding Risks of MachineryF E T Y Additional Milling Machine Safety Preparation Overview Things Youll NeedUnpacking InventoryCleaning & Protecting Before cleaning, gather the followingBasic steps for removing rust preventative Location Lifting & Moving To lift and move the millLeveling & Mounting Bolting to Concrete FloorsLeveling Assembly To install the ball handlesBall Handles Knee CrankFront way cover installed Way CoversPower Connection SB1025 220V 3-PhaseSB1024 SB1026Initial Lubrication Test RunTo test run the machine To test the X-axis power feed unit and table limit switch Inspections Adjustments To perform the spindle break-in procedureSpindle Break-In Operation Overview A typical milling operation, the operator does the followingControl Panel Table MovementGraduated Index Rings Table LocksAxis Power Feed To operate the X-axis power feedHead Movement Tilting HeadRotating Head Tramming SpindleTo tram the spindle to the table Tools Needed QtyPlace the parallel block directly under Ram Movement Moving Ram Back-and-ForthRotating Ram Setting Spindle Speed Setting Spindle Speed RangeDetermining Spindle Speed Setting SB1024 Spindle Speed Range Model SB1024 Spindle Speed RangesSetting SB1025/SB1026 Spindle Speed Range Model SB1025 Spindle Speed RangesMeshing Spindle & Spindle Clutch Setting Spindle Speed Setting SB1024 Spindle SpeedSetting SB1025/SB1026 Spindle Speed F2/R2Using the Coarse Downfeed Handle Downfeed ControlsManual Disengaged Position Auto-Downfeed Engaged Position Using the Fine Downfeed Handwheel Fine Downfeed ControlsUsing the Auto-Downfeed System To use the auto-downfeed systemSpindle Brake = 0.006 in./rev = 0.0015 in./rev = 0.003 in./revLoading/Unloading Tooling Loading ToolingUnloading Tooling Maintenance Schedule Before Beginning OperationsOngoing Daily, After OperationsMonth/Year LubricationCleaning LubricationUnpainted & Machined Surfaces Quill Table Ways One-Shot OilerSpeed Range Bearing Sleeve SB1024 Only Headstock GearingPower Feed Gears To lubricate the power feed gearsRam Ways Head & Ram Rack & Pinion GearPower feed ball handle removed Drive Gear Bevel Gear Cleaning Coolant Reservoir CleaningTo clean out the coolant reservoir HazardsMachine Storage Lubrication section beginning onAdjusting Gibs Disconnect Mill from Power Before Adjusting the GibsAdjusting Leadscrew Backlash Longitudinal Leadscrew BacklashCross Leadscrew Backlash Ball handle, rings, and key removed from Cross leadscrewSymptom Possible Cause Possible Solution TR O U B L E S H O OTI N G Electrical Safety Instructions Wiring Overview Wiring Diagram Color KEYSB1024/SB1026 Electrical Box Box, SeeSB1024/SB1026 Electrical Components Control Panel Viewed From Behind See FigureSB1024/SB1026 Electrical Component Pictures Motor junction boxSB1025 Electrical Box SB1025 Electrical Components SB1025 Electrical Component Pictures SB1025 Motor junction boxHeadstock Headstock Parts List DescriptionReverse Trip Ball Lever Quill SB1024 Gearbox SB1024 Gearbox Parts List DescriptionSB1025/SB1026 Gearbox SB1025/SB1026 Gearbox Parts List SB1024 Belt Housing SB1024 Belt Housing Parts List SB1025/SB1026 Belt Housing SB1025/SB1026 Belt Housing Parts List CAM Ring Screw M6-1 XRam Ram Parts List 668 Column, Knee, & Saddle Parts List Saddle GIB709 Table Parts List Leadscrew NUT BracketOne-Shot Oiler C D E F G HSB1024/SB1026 Electrical Box & Control Panel Electrical BoxSB1025 Electrical Box & Control Panel Control PanelAccessories SB1024 Head Machine Labels SB1024 Main Machine Labels 220V 1PH LabelSB1025/SB1026 Machine Labels Page R R a N T Y Southbendlathe.com