SHIMPO DT-365E - Manual (Page 18)

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4.4.3.1 How to set the delay
The delay angle from the pulse input to emission can be set by 0.1º within the range between 1º
and 359º by setting one cycle of the external trigger pulse to 360º. Measure the external trigger
pulse frequency per cycle, and calculate the delay angle based on the measured frequency to
perform the delay emission. Since a delay of approximately 20 μs always occurs for the internal
calculation, the actual delay time is calculated as follows:
Delay setting angle
x External trigger pulse cycle + Approximately 20 μs
360°
[Example 1] When setting the input frequency to 10 Hz (600 fpm), trigger edge to "rising",
and delay angle to 36º
External trigger pulse
(Pulse entered from an
external device to DT-365E)
Strobe emission
100ms（360°）
10ms（36°）
Frequency
calculation
Delay
Emission
Frequency
calculation
100ms（360°）
10ms（36°）
Delay
Emission
• Since the delay angle is calculated based on the previously entered external trigger pulse cycle, if
the external trigger pulse frequency changes, emission cannot be performed at a precise angle.
Also, since the external trigger pulse cycle becomes shorter than the previous pulse cycle, if the
next external trigger pulse is entered before delay angle emission, the delay angle setting will be
disabled, and emission is performed simultaneously(*) with the external trigger pulse.
• When the delay angle is set to 0º, emission is performed simultaneously(*) with the external
trigger pulse.
(*Since there is a delay caused by the internal calculation process, the strobe actually emits light in
approximately 20 μs after the external trigger pulse is entered.)
Turn the dial to the right to increase the delay angle setting value. Increasing the setting value from
359º will be 0º.
4.4.4 Saving the setting values
While using the unit while on internal oscillation emission and external synchronous emission,
press the power switch and turn the power OFF to save the setting value to that which it was before
turning the power OFF.
When the power is turned ON again, operation starts from the previous setting value.
When the power is OFF, the following setting values are saved.
During internal oscillation emission
During external synchronous
emission
Emission setting ○
Mode setting ○
Frequency setting ○ -
Emission duration ○ ○
Delay angle ○ ○