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PM-30MV v3 2020-10 Copyright © 2020 Quality Machine Tools, LLC
Figure 3-6 X-axis locks (representative)
These lock handles can block Y-axis motion. Keep them clear of the
dovetails.
RAISING & LOWERING THE HEADSTOCK
The Z-axis crank, Figure 3-9 inset, is at the top right of the
column. An air spring inside the column assists upward move-
ment. If the mill has a 3-axis DRO the headstock position is
displayed at all times. If not, the headstock can be positioned
approximately by reference to an inch scale on the column.
For more precise positioning the crank hub has a graduated
dial with 0.001” divisions (be aware of backlash in the bev-
el gears controlling the Z-axis leadscrew, and also in the
leadscrew nut).
When the headstock is at the desired height, lock it in place,
especially for milling operations.
In operations calling for precise depth control, such
as milling, the quill should be fully retracted into the
headstock and locked, Figure 3-8. The headstock
should also be locked, Figure 3-9.
Figure 3-7 Y-axis locks (representative)
On some models these screws may have molded ratcheting handles
like the X-axis locks
Figure 3-9 Z-axis locks
Figure 3-8 Quill locking lever
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