Description:

The head install command should be used when installing a head onto the carriage mount. It is important that a plate is loaded before issuing this command with the focus beam hitting the surface of the plate. Use the same method as before. Be sure that the media thickness and carrier thickness parameters are correct since the head determines the lens position to hold the lens at based on the sum of these. For a total thickness of 305 um the lens will be very near the center of its travel. The head is switched internally to fmode 1 during head install but note that the ususal fmode 1 lens position parameter "lpos" has no effect during head install. Note that the maximum setup range is +/- 200 um from center but the head works best if lens is near the middle. In some cases it may be desirable to set the lens position independent of the media thickness. In this case use the lower level "head stream on" command instead after switching the focus to fmode 1 and setting the "lpos" to zero.

head install on

The laser will be disabled, the focus will be setup for install mode, the shutter will open, and the focus sum, difference, and error values will scroll on the diagnostic terminal every second. The values will change as the head is moved forward and backward on the mount.

head install off

The shutter will close, the data scrolling will stop, and the focus will be taken out of install mode. Note that the laser will remain disabled.

It is not necessary to change any NVS parameters when using this command.

Applies To:

• Thermal

Syntax:

Notes:

See Also:

• Command: head
• Command: head stream
• NVS: media cthk
• NVS: media thk
• NVS: hdm fmode