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

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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