POSITIONING RAM AND RAM BED
The ram has approximately 2· of travel on the ram bed. A fixed and loose
guide permits general positioning of the ram and ram bed assembly on the
machine bed, for grinding various diameter parts as outlined below (See A,
B, or C). To position the ram and ram bed assembly proceed as follows:
1. Loosen front and back acorn nuts of loose guide; then the center acorn
nut. If necessary, tap lightly with a soft hammer to break guide loose.
2. Loosen hold down nut of hydraulic motor bracket or transmission case
bracket, as applicable, so bracket may slide back or forth as desired.
3. Pull complete ram and ram bed assembly away from the work wheel,
providing approximately 3" of space between the work wheel and the
regulating wheel.
4. PG-7 FORM GRINDER: back off dwell adjusting screw approximately 1 /2".
PG-9A, PG-9HD, PG-9BHD FORM GRINDER: slide the orange Micro-switch
cam (#5) all the way forward on the cam rod.
5. Slide the yellow Micro-switch cam (#1) all the way forward.
6. Start the hydraulic system.
7. Depress the yellow Micro-switch causing the ram to advance.
8. Loosen the positive stop locking screw and back off positive stop so that
the ram may advance to within 1/4" of the front of the ram bed. This
is accomplished by alternately manually depressing the yellow, then the
orange Micro-switches; at the same time adjusting the positive stop
screw as required.
9. With this step accomplished, slide the complete ram and ram bed assembly
forward to the position required for the particular job to be run. This
position varies according to the diameter of the work and depth of form
to be ground. Check the following conditions and then position accordingly.
A. When finished part's major diameter is close to, or slightly under
the diameter of the unground stock, position ram and ram bed
assembly so that the space between the work wheel and the
regulating wheel is approximately 1 /2 the diameter of the finsihed
ground part (See sketch- top view).
B. When finished part has a form ground into only a portion of the
diameter, the setting is then equal to the diameter of the
finished ground part minus depth of cut (See sketch- center view).