Use this feature to bring a reference mark, such as a keyway, into
your line of sight. It may be necessary to adjust the
fl
ash rate to
keep the target sta c if the speed is dri ing.
Use the JOG Menu to set a PHASE Delay of –30°.
The display will show PHASE with the le and right arrow icons. Use
the joys ck to adjust the
fl
ash rate to stop mo on of the rota ng
object. Then use the
e
and
f
icon touch bu ons to move the phase
of the objects as shown in Figure 8.
Figure 8 Phase Shi ing by –30°, –60°, –90°
7.2 External / Laser Delay
There are three External Delay Modes:
Phase Delay
,
Time Delay
and
Auto (Virtual RPM)
. These modes are only ac ve if an external
trigger source is available via the internal Laser Module or an
external sensor.
7.2.1 Phase
Delay
In the External Phase Delay Mode the flash is delayed from the
external trigger by the number of degrees set in the DELAY
PHASE menu (+345.0° to –360.0°). One revolution is 360°. The
display will show the
PHASE
icon to indicate the delay mode. See
Figure 9 for examples of the effect of setting various PHASE
delays with respect to the trigger point.
27
STOP MOTION
-30°
-60°
-90°
P
PHASE
◄
►
TRIGGER POINT
-30°
-60°
-90°
Figure 9 Triggered Phase
The Phase Delay tracks the speed of the target; the strobe is
con nuously compu ng the delay angle for the current speed.
In the Menu, the adjustments happen in
real me
, so if the
strobe is
fl
ashing the user can view the e
ff
ect of changing the
display.
7.2.2 Time
Delay
In the External Time Delay mode the
fl
ash is delayed from the
external trigger by the me in milliseconds (msec) set in the
DELAY TIME menu (-50.000 to +50.000 msec). The TIME Delay
is absolute and remains constant irrespec ve of the speed of
the target. The display will show the
TIME
icon to indicate the
Delay Mode. The e
ff
ect is similar to Figure 9 above but the
delay will be in the millisecond se ng in the TIME Menu. In
the Menu, the adjustments happen in
real me
, so if the strobe
is
fl
ashing the user can view the e
ff
ect of changing the delay.
7.2.3 AUTO
-
Virtual
RPM
In the AUTO (Virtual RPM—VRPM) mode the
fl
ash is
automa cally delayed in increasing or decreasing amounts
a er the external trigger pulse so that the image appears to
rotate at a slow speed (Virtual RPM) as set in the VRPM menu
28
www.
GlobalTestSupply
.com
Find Quality Products Online at: