Downfeed Control; Spindle Brake - Southbend SB1063 Owner's Manual

Model SB1063

Downfeed Control

When the machine is set to the CNC mode,
the quill and spindle become locked with the
servo-driven ballscrew. As a result, the manual
downfeed lever is disabled and should be
removed.
When the machine is placed in Manual mode;
the quill and spindle are unlocked and can be
controlled manually. For this operation, the
downfeed lever can be easily reinstalled as
shown below.
To install downfeed lever:
1. DISCONNECT MILL FROM POWER!
2. Position downfeed lever at top of spindle
stroke.
3. Align index pin with closest index hole (see
Figure 26).
4. Slide hub onto shaft until detent pin engages
with its associated detent on shaft.
ON
OFF
Detent
Index
Pin
Detent
Pin
Hub
Figure 26. Downfeed handle hub, detents, and pin.
-32-
O P E R A T I O N
Auto-Downfeed System
Spindle downfeed movement is controlled by
toggling from CNC mode to Manual mode.
When in CNC mode, the quill is locked with
the ballscrew and the feed lever cannot pull the
quill down. The opposite is true when in Manual
mode.

Spindle Brake

When pushed, the spindle brake lever (see
Figure 27) activates a switch that turns the
spindle motor OFF and engages drum-type brake
pads to stop spindle rotation.
Index
Holes
Spindle brake is typically used in an
emergency situation where you need to stop
spindle in a hurry. Overuse of spindle brake
will lead to excessive wear of brake pads and
drum.
For Machines Mfd. Since 5/19
Figure 27. Location of spindle brake lever.
Spindle
Brake Lever