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HM 1000/1250
6. Resetting the reference point for the B axis
You must reset the home position for the B axis if you have reinstalled the B-axis servo
motor, or the B axis goes wrong, or "2073 Pallet or Table CL/UNCL Switch Alarm" occurs.
1) Set the B axis to "0" and perform the table unclamping.
▪ "MDI" Mode : G90 B0.; M11;
2) Install the test indicator on the spindle head and move the X axis to correct the
parallelism of the edge locator.
① Switch the mode to Handle, select "B Axis" for the axis, and set it to "x1".
② Turn the handle inch by inch to correct the parallelism between edge locator and X
axis as precise as possible.
3) If the parallelism is corrected properly, set the fourth item "Bit (APZ)" of the B-axis row in
parameter #1815 to "0". Then, change it to "1" and turn off the power.
▪ If you change the "Bit (APZ)" parameter, the "P/S Alarm 000 Must Turn Off Power"
and "P/S Alarm 300 nAxis Need ZRN" alarms will occur.
4) If you restart the machine, the above alarms will be set off and the position of the B axis
will be changed to "B0.".
5) Take the exact clamping position for the table.
① Rotate the B axis from +90 degrees to 0 degree and from -90 degrees to 0 degree,
and check the table movement on the screen when clamping is performed. (the
teeth of the curvic coupling interlock with each other)
② Rotate the B axis CW or CCW to check in which direction it moves more and
perform the unclamping of the table in that direction. Then, manually move the B
axis, for instance, by ±0.03∼±0.05, and follow the steps 3) ~ 4) above.
6) Repeat the steps above until the table movement is the same in both directions when
clamping is performed.
▪ The movement is the backlash of the table (B axis) itself.
X axis
HM1000ISE99
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