Grizzly G0808, Owner'S Manual

Page: 34 / 68

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Model G0808 (Mfd. Since 11/15)
The depth stop limits the drilling depth or down-
ward movement of the cutting tool. The maximum
depth is 5". This is useful when performing the
same operation multiple times.
To set depth stop:
1. DISCONNECT MACHINE FROM POWER!
2. Install tooling (refer to Page 30), then make
sure spindle is drawn all the way up into
headstock.
3. Loosen Z-axis table lock, and raise table until
it is approximately
1
⁄
8
" below tooling.
4. Rotate depth stop adjustment knob until top
of depth stop pointer is level with desired
depth as listed on scale (see
Figure 47).
Note: The depth stop scale functions as
a general guide only. It is not intended for
tight-tolerance, precision results. To calibrate
the depth stop see
Calibrating Depth Stop
on Page 43.
Setting Depth Stop
Figure 47. Location of depth stop controls.
Depth Stop
Pointer
Depth Stop
Adjustment Knob
Using Fine Downfeed
Fine downfeed is typically used for precise, non-
retractable Z-axis positioning of a cutter or end-
mill when milling a flat surface across the face
of a workpiece. The fine downfeed handwheel
is equipped with a graduated collar (see
Figure
46 on Page 31) with 0.001" increments. Each
complete revolution of the handwheel equals
0.100".
In order to ensure the milled surface remains flat,
the quill lock lever should be locked after each
adjustment to ensure the spindle height cannot
move until the entire milling operation is complete.
To engage fine downfeed, make sure the spindle
is completely stopped, and tighten the downfeed
selector. Rotate the fine downfeed handwheel
to raise or lower the spindle (see
Figure
46 on Page 31).