Using the Thermal 2 Splot Scripts

Note 1 | Note 2 | Note 3 | Note 4 | Note 5 | Note 6

Note 1

The write laser must be on while executing any of the Thermal 2 Splot scripts. To turn it on, do one of the following:

• Turn on the laser by hand before running the scripts. Turn on the beam pointing servo and set up the light valve driver to local mode. For example, to turn the laser on to 20A, then issue the commands:
  1. th2> bpd mode on
  2. th2> lvd mode local
  3. th2> ldd mode current 20
  After the script has terminated, turn off the laser with the command ldd mode off.
• Configure the scripts to automatically turn on the laser by adding the following lines to the LocalJig_Include.spt file:
  • #define TII_STATION_FIELD
  • #define LASER_TO 20
  The second line is the timeout, in seconds, for turning on the laser. This value may vary.

Note 2

These scripts assume that some type of media is present on the drum in front of a properly installed head. You must turn on the focus servo yourself.

For example, to turn on the servo, at lpos = 0um (the most common location), enter the following commands:

1. th2> foc mode 1
2. th2>foc on
3. th2>foc lpos 0

At the end of the script, you should turn the focus servo off, using the foc off command.

Note 3

To convert raw error units to microns, divide the raw number by the nvs setting foc errorcal.

Note 4

To convert raw lpos units to microns, divide the raw number by the nvs setting foc lposcal.

Note 5

The sum is considered saturated if either an increase in the FOC RcvrGain parameter or a decrease in the surface reflectivity setting does not result in an increase in the sum signal. This tends to happen at 2047, but can happen with a sum signal several hundred lower.

Note 6

The M8 and BP readings are considered saturated if an increase in laser current does not produce an increase in the sensor reading. This tends to happen at a reading of 4095, but can occur at readings as low as or slightly lower than 3500.