Frequently used Lotem 800 Quantum firmware commands

This document lists and describes commands and NVS parameters that are frequently used with the Lotem 800^® Quantum:

Thermal 2 Exposure Head Firmware commands

NVS Parameters

Thermal 2 Exposure Head Firmware commands

prm dump
NVS parameters can be displayed using the following monitor command:

TH2> prm dump

Note that all NVS parameters are displayed; the only exceptions are NVS parameters that are not accessible using monitor commands and are intended for engineering usage only.

prm diff
The NVS parameters can be compared to the baseline NVS parameters using the following monitor command:

TH2 >prm diff

The baseline NVS parameters are verified and then the NVS parameter are compared to the baseline NVS parameters. The following differences are displayed:

• Any NVS parameters that differ from the baseline NVS parameters are displayed.
• Any NVS parameters that do not exist in the baseline NVS parameters are displayed.

Note that a small number of NVS parameters that do not exist in the baseline NVS parameters typically results when the exposure head firmware is upgraded. A significant number of NVS parameters that do not exist in the baseline NVS parameters typically results when the baseline NVS parameters have never been saved.

prm save
The NVS parameters can be saved to the baseline NVS parameters using the following monitor command:

TH2 >prm save

The NVS parameters are verified, the baseline NVS parameters are erased and then the NVS parameters are saved to the baseline NVS parameters.

prm restore
The NVS parameters can be restored from the baseline NVS parameters using the following monitor command:

TH2 >prm restore

The baseline NVS parameters are verified and then the NVS parameters are restored from the baseline NVS parameters. Any NVS parameters that do not exist in the baseline NVS parameters are ignored ( presumably the user has done a compare and is aware of the differences ).

Splot Scripts
The Splot script nvsdump.spt will dump a readable version of the NVS parameters and the Splot script nvsrestore.spt will restore the readable version of the NVS parameters. Further information about Splot and Splot scripts is beyond the scope of these release notes.

NVS Parameters

Sscale
This parameter changes the scale of the image in the subscan (head travel) direction. This parameter is calibrated during factory integration and normally should not change after this. Adjustments should be made with advice from factory integrators. Make this parameter positive to make image larger, negative to make it smaller.

Mscale
This parameter changes the scale of the image in the mainscan (around drum) direction. This parameter is calibrated during factory integration and normally should not change after this. Make this parameter positive to make image larger, negative to make it smaller.

Mshift
Nominal shift from the imaging origin in the mainscan (around drum) direction. Normally, this parameter is not changed from the default value. Exact adjustments to the image position are usually made with the gc mssa parameter.

Sshift
Adjusts the image position in the subscan (head travel) direction. This parameter is calibrated during factory integration and normally should not change after this. Adjustments should be made either with advice from factory integrators or with the special plate registration measuring jig. Make this parameter larger (more positive) to shift the image away from the plate's edge detect edge.

Ortho
This parameter rotates the two imaging axis (mainscan and subscan) relative to one another. It is used to make the sides of an image square. This parameter is calibrated during factory integration and normally should not change after this. Adjustments should be made with advice from factory integrators. A positive angle will rotate the mainscan (around drum) axis in a counter-clockwise direction.