Straightness Of Y Axis - Doosan HM 1000 Installation Manual

HM 1000/1250

10.3 Straightness of Y Axis

1) X - Y
ⓐ Measure
Install the square vertically on the pallet
deck in the X-axis direction and install the
indicator on the spindle head. Set either
end of the square to "0" and check the
measurement in the middle of the square.
▪ Measuring point : both ends and center
▪ Tolerance: 0.005mm / 300mm
ⓑ Correction
Correction is not possible as the
squareness is attributed to the physical
column sliding side.
However, correction is necessary as the gap of the gib in the X axis may have a
problem or the ball screw in the Y axis may be improperly aligned.
※ Adjusting the Y-axis gib
(1) Move the Y axis to the center of the stroke. (This is for minimizing the axial shaking
affected by the ball screw. For a more precise measuring, loosen the fixing bolts on
the ball screw nut and proceed with the measuring.)
(2) Loosen the set-screw (BQ bolt) of the gib-adjusting bolts completely.
(3) Slowly tighten the BB bolt (one of the gib adjusting bolts) at first. Then tighten it up
when you feel that the gib gets tightened. (this is where the gap between gib and
column sliding side becomes "0")
(4) Then, loosen the bolt (BB bolt) by half or one turn.
(5) Tighten back the set-screw (BQ bolt) and pull out the gib as much as you have
loosened the BB bolt. (Theoretically, this will make the gap between 0.01mm and
0.02mm)
(6) Adjust the upper and lower gibs in the same way.
※ Measuring the gap for the Y-axis gib
(1) Install the indicator on the spindle head and put the gauge on the grinding side.
(2) Move the Y axis to the center of the stroke.(This is for minimizing the axial shaking
affected by the ball screw. For a more precise measuring, loosen the fixing bolts on
the ball screw nut and proceed with the measuring.)
(3) While manually pushing the indicator area of the spindle head to the side, move the
axis in + or – direction in Handle or jog mode to set the gauge needle to "0". Then,
pull back and move the axis in the same way to check the movement of the needle,
which is the gap of the gib in the Y axis.
50
Indicator
HM1000ISE99