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Rev C
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of 92
Figure 80
The “Get Limits” button initiates a sequence to find the limit switch positions and set the upper and lower
motion limits to an appropriate distance from the switch positions. The
“Calibrate Height” button will run a
motion sequence which will exert the amount of force specified in the “Block Force” entry field on a height
spacer block to calibrate the axis position relative to the surface of the machine table. Prior to calibration the
height of the spacer block must be entered into the “Block Height” entry field and the force to calibrate the
height at must be entered into the “Block Force” entry field. The speed at which the axis should move down to
perform calibration must be entered in
the “Calibration Speed” field.
The Z axis zero is defined as the position where the head pressing surface is in contact with the table and
loaded to the force specified in the “Block Force” entry field. The load is applied to be sure all clearance
is
eliminated from the various head components such as the ball screw and the head to structure air gap.
Since the head cannot actually travel all the way to this point, a spacer block must be placed between the head
and the table to set the zero position. A tool is supplied with the press for this purpose. This same tool is also
used for PCB thickness measurement. The height of this tool should be entered in the “Block Height” entry field
prior to height calibration.
To set or verify the Z axis zero position, place the spacer block on the table, centered beneath the head anvil.
The head should be positioned at the center of the machine. It is recommended that the “Calibration Speed”
field be set to less than 1 mm/s. At this point, press “Calibrate Height”.
WARNING
Due to the machine’s high rigidity
, the force can build very quickly, resulting in significant force overshoot if the Z axis is
moving faster than the minimum speed. Always reduce the speed when approaching an object such as the thickness probe
tool. Use incremental mode @ 0.10 mm or 0.02 mm when manually pressing in the joystick.
