Command:HERE (H)
The 'here' command differs on a TGPMT card from our other systems.
- Actuators, Piezos, MicroMirror etc
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- MS2000 or RM2000 syntax
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The HERE command sets the current reported position(s) of the axis(es) provided.
Shortcut H Format HERE [axis]=[position in 1/10 microns]… Units 1/10 microns Remembered Automatically
- Tiger syntax
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Shortcut H Format HERE [axis]=[position in 1/10 microns] or see below for clocked devices Units 1/10 microns Type Axis-Specific Remembered Automatically
Assign the specified number to the axis’s current position buffer. If no position is specified, 0 is assumed. For non-clocked devices, the unit of measurement is in tenths of microns. This defines the current position to be a specific distance from the origin (0).
Clocked Devices:
On clocked devices (filter slider, turret, mirrored port switch, etc), you can change position #1 or you can change the spacing between positions.
Change position #1“- Remove all axes from either the joystick or a knob (for example, the Z-axis from the Z-knob J Z=0).
- Assign the clocked device axis to that joystick or knob (for example, the M-axis to the Z-knob J M=22).
- Use the joystick or knob to adjust the axis to the desired position.
- Issue the 'here' command to set the position (for example, the M-axis H M=1).
- Restore (assign and unassign) the desired axes to the joystick / knobs as desired (for example, the M-axis from and the Z-axis to the Z-knob J M=0 Z=22).
Change the spacing between positions:
- Move to position #2 (for example, the M-axis M M=2).
- Remove all axes from either the joystick or a knob (for example, the Z-axis from the Z-knob J Z=0).
- Assign the clocked device axis to that joystick or knob (for example, the M-axis to the Z-knob J M=22).
- Use the joystick or knob to adjust the axis to the desired position.
- Issue the 'here' command to set the spacing (for example, the M-axis H M+.
- Restore (assign and unassign) the desired axes to the joystick / knobs as desired (for example, the M-axis from and the Z-axis to the Z-knob J M=0 Z=22).
Only available on MS2000 version 9.2m and above, TG1000 version 3.28 and above.
If there are no errors, the positive reply :A will be sent back from the controller
DOES NOT WORK FOR PIEZOS AND MICROMIRRORS.
DOES NOT WORK FOR “CLOCKED DEVICES” SUCH AS FILTER SLIDERS AND TURRETS.Example
H X=1234 Y=4321 Z :A
The X position will change to 123.4 microns from the origin, Y will change to 432.1 microns, and the Z will be zeroed. Example
H X=1234 Y=4321 Z :A
The X position will change to 123.4 microns from the origin, Y will change to 432.1 microns, and the Z will be zeroed.
- TGPMT usage
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Shortcut H Format HERE [axis]
or
HERE [axis]=0
Type Axis-Specific Remembered Automatically On a TGPMT card , this command this used to Zero the PMT signal reported by the RDADC command. When this command is issue , the current PMT signal is saved , and the controller begins subtracting it from the current PMT signal. Users can use this as a background subtract or offset feature.
User can cancel the zeroing by issuing
HERE [axis]=0
. Readings reported by RDADC command will not be altered anymore.Only the readings reported by the RDADC command are altered. 0-4V Analog PMT signal on the BNC connector is not altered.
This is a card wide-settings , both PMT0 and PMT1's reading are altered.
More details here.
Example
h m :A
If the TGPMT card axis char is m. Saves the current PMTs readings and starts subtracting them from RDADC commands reported readings.
h m=0 :A
If the TGPMT card axis char is m. Clears the saved PMTs readings and stops subtracting them from RDADC commands reported readings.