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SAMLight Manual > Global Settings > Optic > RTC Cards

RTC Cards
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The following dialog can be reached by Menu item Settings → System → Optic. The dialog allows to define the settings of the geometrical dimensions of the scanner field for the selected head:

OpticSettingsRTC

Figure 53: Optic Settings for RTC cards including SCANalone

Working Area [mm]:

Min:/Max: Specifies the Min and Max X, Y scanning field on which the exposure should take place. The working area must be inside the field dimensions.

Field [mm]:

Min:/Max: Specifies the Min and Max X, Y scanning field.

Size: Specifies the maximum scanning field.

Secondary Head [mm]: This field is available for RTC3/RTC4 and SCANalone only. It allows to control two heads with one card. After enabling it there are two working areas shown on the job editor.

X, YOffset: Defines the offset of the second head to the first head. For more information about how to use a second head see also the chapter Option MultiHead.

Lens [mm]:

XY Flip: Exchanges X and Y axis.

X, Y, Z Invert: Inverts the axis direction. Z Invert requires the SAM software options Optic3D or SAM3D.

Gain X, Y: The X and Y gain values are thought to compensate slightly X, Y gain errors to archive a quadratic field. Values less than 1 will reduce the scanner field. Values greater than 1 will expand the scanner field. Global gain errors which have the same deviation in X and Y directions should be corrected by changing the size of the scanner field (see above).

Example for calculating the size of the scanner field:

If for example the correction table has a step size of 550 bits/mm and the scanner has a 16 bit scanning system, the

size of the scanner field = 65535 bits * mm / 550 bits = 119.16 mm

Considering a Gain factor:

scanner field in x direction = 119.16 mm * Gain X

scanner field in y direction = 119.16 mm * Gain Y

Offset [mm] X, Y: The offset values are thought to slightly compensate X, Y offset errors to achieve the theoretical midpoint of the scanner field. Global offset errors which have the same deviation in X and Y directions should be corrected by changing the field X, Y min values in field.

Rotation [deg]: The scanner output is rotated by an angle that is entered here. The resulting scanner output can be checked with Mark -> Preview. Beside the rotation defined in SAMLight -> Settings -> System -> Card (which is performed by the RTC card during the marking process) this rotation will affect the coordinates which SAMLight is sending to the RTC card. Please note that this rotation can lead into a galvo out of range error message.

Home Position X, Y, Z: If this option is enabled, the home position is the position where the scanner is located when no scanning takes place i.e. during handling activity. The home position is in normal cases outside the working area but it must be inside the scanner field.

Correction File Settings: Here the correction file can be specified. This file normally is delivered by the scan head manufacturer and needs to fit to the scanner. For RTC-cards the standard extension is .ctb. When the Save button is pressed the Lens settings from this panel are stored related to the currently used correction file. By clicking on Browse... such a correction file and its related settings can be loaded afterwards. That means using these buttons different lens- and correction file configurations can be managed.

Min:/Max: Opens the Min/Max Dialog to define the range of the values speed, frequency and first pulse killer length of the laser.