York TV Servo Cycler / Tester V3.3
NOTE: If for any reason your YTV Servo Cycler does not perform as
expected, you can reset all factory default values by doing the
following: Remove the battery, press and HOLD the Center button, plug
the battery back in, release the Center button. All factory values
will now be restored. The most common reason to need to reset the YTV
Servo Cycler is inadvertently setting sweep end points so close
together that it seems to fail to sweep when the Up and Down buttons
are pressed together.
Thanks for buying YTVs Servo Tester. Here are your
operating instructions. The YTV Servo Cycler comes ready to run. You
will need to provide a power source of 4.8 7.5 volts. The
intended use is with a 4 to 5 cell NiCad battery pack with standard
R/C plug.
Pay close attention to the polarity on the servo and battery.
Polarity is printed on the board. The YTV Servo Cycler uses the now
standard pin polarity of signal and ground leads on the outside and
power lead (b+) in the center. If you have an older battery or servo
that uses the power lead (b+) on the outside, one of two measures
need to be taken. Either move the pins in the housings or use a
reverse adaptor found in R/C hobby shops. NEW: Futaba plugs will
work in the pin housing. The fit will be a bit snug due to
the extra blade on the side of their plugs, but this has not proven
to be a problem.
The Servo Tester begins to run as soon as a battery is
plugged in (Center Mode). It will continue to run so long as the
battery is plugged in. There is no on/off switch. When
the Servo Tester is first powered on there will be a lit green LED
light. This indicates that power is on and that the output signal is
at 1.5ms (centered).
The 3 switches are used to set the modes of operation.
The CENTER switch is used to reset the output to 1.5ms (R/C servo
center). Note: Some Multiplex servos use 1.6ms centering. The
operations are the same for them, but the centering will be off a
bit. The two outer switches DOWN and UP are used to adjust the servo
arm position, or the two outer switches are pressed together to start
a sweep output. Once in the sweep mode, pressing the DOWN or UP will
increase or slow the sweep speeds.
Default sweeps are made from .9ms to 2.1ms. in 9 speed
ranges. The slowest of these sweep speeds will take 45+ seconds to
complete a full cycle. The fastest sweep speed will be faster than
most servos can keep up with. The location of the sweep end-points
are adjustable. To enter a new end-point press the UP or DOWN buttons
to the new end-point. WHILE still holding the UP or DOWN button, tap
the center switch (this is kind of like marking the point
on-the-fly while the servo is still slowly moving). The servo arm
will return to center when you release all buttons IF the new end
point was saved. Repeat the same for the opposite direction. Now when
you enter the sweep mode, the sweep will be limited to between the
new end-points. Your new end-points and sweep speeds will remain in
memory even after removing the battery. To reset the end points and
sweep speeds to the factory settings (full range sweep and mid
speed), HOLD down the CENTER button when plugging in the battery.
Once power is applied, release the CENTER button. The cycler will go
to the center mode and the sweep endpoints and sweep speed will be
restored to normal. Note that if the servo under test is already
installed in the plane, it would be wise to set new end points before
entering the sweep mode to avoid overdriving the servos mechanism.
There are two LED lights, one red and one green. The
green LED functions to show that power is on when a battery is first
plugged in, show when dead-center is being outputted and together
with the red LED shows that the Servo Tester is in the sweep mode.
The red LED shows when the output is not centered and it blinks when
output is beyond the normal 1 to 2ms range. The green and red
LEDs both lit shows when the Servo Tester is in the sweep mode.
You always know you are centered when only the greed LED is lit.
One unusual feature if the YTV Servo Driver is that in
the Offset Mode, the movement is paused for .75 seconds when
adjustment range is at normal limits (1ms or 2ms). After this .75
second pause, further adjustments can be made outside the normal
range (<1ms and >2ms) up to .9ms or 2.1ms. This process is to
let you know when normal range has been reached and if the red LED is
blinking this lets you know that you are beyond the normal range.
When reversing the direction (in extended range) with the adjust up
or down buttons, this .75 second pause is again used to let you know
that you are at the normal limits. Once the pause is over, the red
LED again is lit steady (blinking stops) as adjustments are made in
the normal range.
The dual servo plug is simply a parallel connection
between the two and both sets of plugs are also in parallel
connection. The same polarity is used on both plugs, with the
negative wire towards the edge of the board. 3 - 4 servos may be
driven at the same time. Note that any of the pins sets can be
used for battery and or servos.
The following is a description of the possible LED and
servo drive conditions:
GREEN
LED |
RED
LED |
MODE |
BUTTONS USED |
ON |
OFF |
Center Mode
(1.5ms)
Servo holds center |
Press
CENTER
Also, on
initial power up (no switch pressed) |
ON |
ON |
Sweep Mode
(.9 to 2.1ms)
Servo cycles
back and forth |
Press
DOWN and UP together |
OFF |
ON
(steady) |
Offset Mode
(1 to 2ms)
Servo holds
offset position |
Press
DOWN or UP
Tap for steps
Hold
for moving |
OFF |
ON
(blinking) |
Offset Mode
Extended Range
(<1ms, >2ms)
Servo holds
offset position |
Press
DOWN or UP
Tap for steps
Hold for moving |
OFF
(ON after reset) |
OFF |
Rest Mode
Restores
factory sweep
End
points and speeds |
Press and
hold CENTER
While
applying power
Release
CENTER after power is applied |
OFF |
ON |
Set Sweep
End Points
Program
sweep end points (user defined) and store results in non-volatile memory |
Press and
hold UP or DOWN and tap CENTER when position is reached -
Returns output to center confirming programming valid |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
York Electronics
www.york-electronics.com
1005 S. Josey Ln., suite 208
sales@york-electronics.com
Carrollton Texas 75006
972-418-9000