Jet 690008 jtm-4vs mill w User Guide
19
Positioning the Ram
Positioning the Ram Fore and Aft
1. Loosen the two bolts (A, Figure 23) that lock the
ram to its ways.
Figure 23
2. Turn the lever (B, Figure 23) to move the ram on
its ways.
3. When the desired position is reached, lock the
bolts (A, Figure 23) securely.
Positioning the Ram on its Turret
Make sure the machine base is
secured to the floor before repositioning the ram.
The center of gravity can shift enough to cause
the machine to tip over, resulting in serious injury
to the operator and damage to the machine.
The center of gravity can shift enough to cause
the machine to tip over, resulting in serious injury
to the operator and damage to the machine.
1. Loosen four turret lock bolts (C, Figure 23) that
clamp the ram to the top of the base. 1/2 turn
should be sufficient to allow the turret to move.
should be sufficient to allow the turret to move.
Note: Use gentle hand pressure to avoid rapid
movement.
movement.
2. Turn the ram until the spindle is in the desired
position. Use the scale on the turret for degree
measurement.
measurement.
3. Tighten the four turret lock bolts (C. Figure 23).
Gib Adjustment
The table, saddle and knee are equipped with
adjustable gibs. The gibs may require adjustment if
unusual vibration is noted when the locking
mechanisms are off, or if you experience unusual
vibration when spindle speed, tooth pitch or depth of
cut do not account for the vibration.
adjustable gibs. The gibs may require adjustment if
unusual vibration is noted when the locking
mechanisms are off, or if you experience unusual
vibration when spindle speed, tooth pitch or depth of
cut do not account for the vibration.
NOTE: When adjusting gibs, always start with the
knee first; adjust the saddle second, and adjust the
table last.
knee first; adjust the saddle second, and adjust the
table last.
Figure 24
Adjustment of Knee Gib
The knee gib adjustment screw (A, Figure 24) is
located under the chip wiper at the rear of the knee
where it contacts the column. Remove the way cover
and the wiper to expose the gib adjustment screw.
Tighten the screw until a slight drag is felt when
turning the knee crank.
located under the chip wiper at the rear of the knee
where it contacts the column. Remove the way cover
and the wiper to expose the gib adjustment screw.
Tighten the screw until a slight drag is felt when
turning the knee crank.
Adjustment of Saddle Gib
The saddle gib adjustment screw is on the left front of
the saddle (B, Figure 24). Tighten the screw until a
slight drag is felt when turning the cross-feed crank.
the saddle (B, Figure 24). Tighten the screw until a
slight drag is felt when turning the cross-feed crank.
Adjustment of Table Gib
The table gib adjustment screw (C, Figure 24) is on
the left-hand side, beneath the table. Tighten the
screw until a slight drag is felt when turning the
longitudinal table cranks.
the left-hand side, beneath the table. Tighten the
screw until a slight drag is felt when turning the
longitudinal table cranks.