Grizzly g0747, g0748 owner manual Spindle Downfeed, Downfeed Controls

Spindle Downfeed

Spindle downfeed movement on the mill is con- trolled by three mechanisms: 1) The coarse downfeed lever, 2) the fine downfeed handwheel, and 3) the auto-downfeed system.

Downfeed Controls

Use Figure 34 and the following descriptions to become familiar with the spindle downfeed con- trols.

A		J
		I
B
		H
	C	G
D		F
E

Figure 34. Downfeed controls.

A.Auto-Downfeed Rate Selector. Selects one of the three auto-downfeed rates.

B.Fine Downfeed Handwheel. Manually con- trols slow spindle downfeed.

C.Auto-Downfeed Direction Pin. Starts, stops, and reverses the auto-downfeed direction.

When spindle rotation is reversed, either by changing the spindle speed range or by using the spindle direction switch, the direc- tion of spindle auto-downfeed will reverse.

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 used to secure it in place.

H.Coarse Downfeed Lever. Manually controls quick spindle downfeed.

I.Quill Dog. Moves with the quill and spin- dle, and disengages the downfeed clutch lever when it contacts either the top or the downfeed stop.

J.Downfeed Selector. Sets the mill for manual downfeed or auto-downfeed control.

-36- Model G0747/G0748 (Mfg. Since 8/12)