User`s manual

PC Hardware vs SPC During SPC operations, the css must perform a large
Performance
number of statistical and other calculations from the
moment it acquires inspection results data from the SLS
until it updates the graphic and numeric data on the PC
display. These calculations require time; thus, in some
circumstances the SLS can deliver results data faster than
the CSS can process that data and display the results on the
PC monitor.
When that happens, the CSS instructs the SLS to suspend
data transmissions until it “catches up” with thf processing
load; and, at the same time, it displays a “W” (Warning)
icon on the display to alert you to the fact. When it fiiishes
its current work load, the CSS instructs the SLS to resume
sending results data.
In the meantime, however, the SLS may have already
acquired and processed another image, and issued
inspection results to the SLS outputs. In that case, the CSS
will have missed one results “data point,” and will perform
all subsequent calculations without that data point.
To avoid this situation, you need to consider the factors that
determine whether the CSS can “keep up” with the SLS (or
SLs’s):
1. The type of microprocessor in the PC. (An 80286 is
more powerful than an 8088, and an 80386 is more
powerful than an 80286, and so on.)
2. The clock rate of the microprocessor in Mhz. (8Mhz is
faster than 6Mhz, and so on.)
3. The presence (or absence) of a math coprocessor in the
PC. (A math coprocessor increases the PC’s calculation
sped.)
4. The type of graphics adapter in the PC.
5. The rate at which the SLS acquires images (generally,
the trigger repetition rate).
6. The base cycle time of the selected SLS analysis
function. (1-D Object Recognition has a longer base
cycle time than 1-D Spatial Measurement, for
example.)
7. The exposure time. (Lower light levels increase the
overall cycle time.)
8. The number of SLS’s connected to the PC.
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