Table 6 Sample Scan-Speed Calculations - Olympus 38DL PLUS User Manual

DMTA-10004-01EN, Rev. D, November 2016
ENCODER PULSE
The encoder pulse must be set in accordance with the encoder being used and it's
specifications. The Olympus EP4/ENC Encoder Buggy is always set to
1.97 pulses/mm or 50 pulses/in..
TAKE READING EVERY
This indicates the spacing between measurements. There is fixed spacing based
on the number of pulses per inch or per millimeter of the encoder.
NOTE
The smaller the spacing, the slower the maximum scan speed. Maximum scanning
speed can be calculated as follows:
Table 6 on page 108 provides sample scan-speed calculations.
Spacing
(in.)
0.040 (min.
spacing)
0.100
0.200
0.500
a. Maximum reading spacing is 595.38 mm (25 in.)
Maximum B-scan distance is also dependent on the reading spacing setting. The
maximum B-scan length can be calculated as follows:
Table 7 on page 109 provides sample maximum-distance calculations.
108 Chapter 7
Maximum scan speed = 20 × Reading spacing
Table 6 Sample scan‑speed calculations
Max. scan speed
(in./sec)
0.80
2.00
4.00
10.00
Maximum scan distance = Reading spacing × 10000
a
Spacing Max. scan rate
(mm)
1.016 (min.
spacing)
1.524
2.032
12.70
(mm/sec)
20
30
40
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