My name is Ahmad Shamshiri. I am presenting this tutorial form Canada.
Hi! Welcome to Robojx. in this video I'm going to show you how we can use this HJ 4 channel
servo consistency tester to see and test servo gear servo and also ESCs. this is a servo tester HJ
this can test simultaneously up to four servo motors. and it's sold around $25 on Amazon you can get
it so this has to switch one knob and also we have there are five connectors you can connect
4 servos and one can be used as a power if the servo cable doesn't have power. so the switches
with pressing this switch you can select three modes so it has main three mode 1 mode is the
manual one so you just rotate it and check at what level the servo responds. the second mode
is the middle mode so it stays at 1500. and then the third one is automatic so it goes from 0
to 2200 up and down to make sure that the servo rotates. also for some servos like digital servo
steering servos and you need different pulse width so also it provides 50 Hertz 125 and 250
Hertz signal for the digital servo. so this will be the weight of the signal would be either 20
microsecond 8 microsecond or 4 microseconds. so using that we can select the width of the signal
so the servo can run properly otherwise for some steering servos if you do not select the
right one for digital servo the server might be damaged. so now I have the 5 volts here prepared
so when you insult the cable here make sure that the signal is at the top and the black
is at the bottom so signal at the top so either you have yellow orange or whatever light color
at the top so the black or color that whatever you have would get the body so this has been
mentioned this way so the negative is on that side so you keep it and then insert it this way.
once you insert the power this is how the screen looks so this is the value that you have
here when you rotate the knob so this is between the two values. now when you press the Select you
see we are in mode 2 now let's change to mood too so when you see this this is s2 so when you
release it that is the neutral so it goes as 1500 well the server stays at the middle can test the
steering wheel steering for the car or wing (of airplane) or whatever it is that you can check. then you press
it and I'm not releasing it but you can do just the release one. the third one goes automatically
it goes to all this value so I can turn it left so it becomes slow when you turn it to the left
it goes from 800 after 2200 you see it's going very slow but if I rotate it to the maximum it
goes very quick from 800 to 2200. so now that now I went back to the first mode so that is
mode 1 in mode 1 it's just totally manual so it goes from 800 to the maximum so the mood is very
important to understand it that you just press release if you just want to read it just hold
it for longer time so that is 2 3 3 is automatic and then 1 manual 2 is neutral and 3 is automatic.
now this is for the digital servo if you have digital servo and you want to set the width of
the signal that's very important so it's 125 now if I press it again it's 250 so the 50 Hertz is
20 millisecond if you do it in terms of time 1 over 50 and then we have 125 Hertz which is
8 millisecond and then this is 4 milliseconds. you just need supply the power and after that
you can connect your servo motor. so let me just test one servo here I have one of those tiny servos SG90 you see
here this color because this is a serve or not ESC ESC will majority of ECS with BEC will have power
but this is doesn't have any power so the black one or the darker color should be at the bottom
let me let me put it the last channel so now that's the servo so if I rotate it you can see
that's the maximum of this motor that servo so that was in a manual so that is at the middle when
I push it in a mood - if I go to mood 3 release it it will go automatically and the speed that
it goes determined by the knob so if you put it on the lowest it will go very slow so you
can check the consistency of a servo a different level. only they can go very fast so always if I go
that is in the manual it stays in 1500 I have a blue bird this was a heavy and a car which
had a crush and glued so many times so I'm just showing you this one so this is a digital servo
so now we are at the 1,500
so it goes very slow so if I make it fast but this one I don't know the specification of this
one I change it 225Hz so when you hold it that is now 120 500 is applied now this is 250 is
applied now this is 50 so you can test it this way so that's the total manual and then more 2
if the neutral so now let me connect a motor here so I've connected the power to ESC from
you see it goes directly to the motor and you see also he's supplying for 5 volt in this one has a
black one at the bottom I can connect it to any of those so this is at the manual now so let me show
you now this is at the middle 1500 so just say there doesn't matter now mu 3 which is automatic
the motor does not change the rotation the valve it just increase
and then stop now I can go with man 1 which is manual this is also a good test
tool sometimes you want to check the threshold of your motor and you ESC and see at what
value they start rotating so this can be used to program or adjust your transmitter
as you can see this stores this motor with this ESC starts at 1600
so the power voltage has no effect with this ESC
that I have here. now I have corrected the different you see and want to see
if the motor reacts or starts rotating at a different value. let me just try to
as you can see here but this different ESC the
muda rotates at around 1525 or 1526 while when I was using
the other ESC it was working it was started running with this one at 1600
so this is a good way to test and also you can tell the behavior of different motor with this
with the same ESC or different ESC. this way when you are building a drone or something
you want to make sure that your ESCs are behaving the same and motors are behaving
the same so you have less fine-tuning later. so if you're testing a you see something like this like
a ESC (sorry) that doesn't have any power from the ESC in that case you need to supply five volts to the
servos separately so connect the power in one of the other one and then connect just again with a
black one to the lower when you're holding it like this so the black one the negative is always at
the bottom you see the white is a signal at the top and the middle one doesn't have any voltage
cable. either if you are building your own drone or you're flying drones or you're having race
cars or you're building robotics and working with Arduino or servo this is a must-have
tool so without this tool you will suffer a lot (😊 Hahahaha ) so if you want to make your life easy get
one of these (link to purchase is below this video) this is the best tool. so this was the introduction to H J servo consistency tester. thank
you for watching please thumb up 👍 the video and please subscribe 🔔 also share it I appreciate it.