hi welcome to product review by Robojax my name is Ahmad Shamshiri.
in this tutorial I’m going to show you how we can test three servo motor these sg90 servo using the
servo tester either in the metal version or this non-metallic version to control and test them
servo motor quickly to tell you is a type of motor that rotates only 180 degrees
from for example if we assume this as zero then we have 180 degrees on this side
assume this is if this is zero then we will have 180 degrees on the other side
and it needs a pulse modulation signal to be controlled
servo has three wires and this the darker wire the brown or black is always ground the
middle wire is always the power usually it is five volts for this small servo
and the last pen which is orange or you will see it white this will be the signal where the signal
is controlling the servo so both of these have the same type of connector in many applications for
receivers and cars and in drones they connect this directly to the flight controller or board
this server controller is sold on eBay AliExpress or amazon it's
very cheap you can get it between two to ten dollars this is the input has been labeled as n
three pins have been labeled as negative positive and s you see that negative
positive energy that's the negative that's a positive this doesn't matter so this will
power this up as you can see the light is on you will connect your negative wire on
this side this goes to my negative order of the battery and this goes to my five volts
and this is the knob that you can control here we have three ports and on this side this is
out and it says negative positive and s negative positive s means signal so this is the sg90 servo
and to con to connect it you can insert three servo with this I’m connecting it
like that the negative is on this side and insert it on the connector here both of these they have
the same exact connector and pay attention to the negative on the other side make sure that you hold
this such that the darker wire is on the other side just insert it and for the other one as well
and the third one
now I’ve inserted them
and here it shows in man and manual I’m going to also test it with this
and manual now it's at the minimum if I rotate this it goes to the maximum this
doesn't go now fully at the maximum because it doesn't send enough signal I believe I’m
going to show you because right now if this is if this long is here 180 should be on the other side
now it doesn't go 180 maybe it goes 150 or something and the same for here this should good
on the other side but you can immediately test your servo
if it is operating or not and now I’m on manual I press it in neutral as soon as I press neutral
all of them supposed to go at the neutral point or the middle because in flight controller or
in cars you will have a steering and left right and the middle so this will take them immediately
to the center and if I press it in auto this will send continuous signal to test your server
and three wires as you can see on this side is negative and the middle one is positive
now I’m connecting it to this non-metallic version positive is always at the middle don't
make mistake and then the negative on this side now it's powered up
the same for this one the negative is on this side
and the same here I’ve inserted all the dark color on this side where it says
negative and then the s is on the other side 3 is now connected the light the manual is on
so I can control it now when I press select with the neutral the light moves here all of
them are supposed to go to the middle they are approximately at the middle and if I press it
again it goes at the auto and automatically sends to control the three server at the same time
and if you're just testing without the load even this mg 996 or 996r you can do that as well
now I’ve connected this larger motor you can test this larger metal gear motor as well as
long as there is no load with this because this doesn't have enough power to make that rotate
and let's go on auto
and the same with the metallic version
thanks for watching this was how to test this servo with the servo tester
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