JETI model BOX MINI Gebrauchsanweisung Seite 7

EN
SERVO CYCLE.
By push-buttons U and D set the number of cycles from 10 to 990 (setting in steps of ten
cycles). The speed can be set from 1 to 99 by push-buttons L and R. A speed of v=1 means that
every following pulse in comparison with the foregoing pulse will change by 0,001 ms until you
reach the limit position. (analogous v=20 means a change by 0,020 ms). The pulse period is
20ms.
By means of push-buttons U and D a value can be set which defines the servo throw in µs,
going from 100 to 500 µs from the center position of 1,5 ms. If the setting is α=500 µs the control
pulse for the servos will change from 1,000 ÷ 2,000 ms (i. e. 1,500 ms ± 500 µs). The value after
the # gives the number of cycles which are still left until the end of the test.
When the test is finished the program returns back to the start SERVO CYCLE.
4. Measurement of servo transfer speeds
By means of this test we can find out how much time the servo needs to transfer from one
defined position to the other one. Measurements can be carried out without load or with the
servo directly installed in the model at real lever conditions.
The pulse width of the first limiting servo position can be set within a range of 1,024 ms to
1,400 ms and the second one within 1,600 ms to 2,047 ms. If we want to measure the speed
when the servo output shaft turns for instance by 60°, we have to adjust this angle for
instance with a protractor.
Connect the battery and the servo, by means of the push-buttons L and R select the function
SERVO SPEED.
By means of the push-buttons U and D set the first limit position of the servo. Proceed with
push-button R until you reach the second limit position, which also must be adjusted by
push-buttons U and D.
Start the test.
On the display you will read the resulting time in seconds, which the servo needs for the
transfer from one set position to the other one. This measurement can be repeated several
times or you can set different limit positions.
We wish you a pleasant time and much fun with our products.
JETI model s.r.o, Lomena 1530, 742 58 Pribor,
www.jetimodel.com, e-mail: jeti@jetimodel.cz
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