Servo Compatibility...
03-17-2003 | 04:55 PM
#1
Thread Starter
Tech Addict
Joined: Oct 2002
Posts: 551
From: www.ozryderz.com
Servo Compatibility...
I have in my possession a JR R-1 and I use the R330S Receiver and they transmit in PCM mode. The plugs on the JR has a 45 degree cut to 2 the edges. Unlike the Futaba, where there is none. But this can be easily fixed by just trimming the edges with a hobby knife.
Which servos can I use?
Which servos can I use?
03-17-2003 | 06:00 PM
#5
PCM/FM/AM is just what the TX uses to talk to the RX; the RX will decode it to a suitable signal pulse that all "analog" servos can use. The radio modulation has no impact on servo signals.
Just watch the plugging... make sure the +ve/-ve/signal leads go into the right holes or else its toast.
Just watch the plugging... make sure the +ve/-ve/signal leads go into the right holes or else its toast.
03-17-2003 | 06:00 PM
#6
Thread Starter
Tech Addict
Joined: Oct 2002
Posts: 551
From: www.ozryderz.com
I saw this on a website:
Does this mean the same for having a JR receiver and using other servos besides Futaba that I will need to reverse the power and ground? any gurus out there?
3.5) Compatibility of servos, speed controls, and receivers
There is a standard three-wire interface between receivers and servos (also receivers and speed controls): +5 volt power, ground, and signal. This receiver wiring harness originates in the servo (or speed control) and plugs into the receiver. But there is no standard for the colors of the three wires, their arrangement in the plastic connector body that plugs into the receiver, or the shape of the plastic connector body.
Novak and Tekin have dealt with this situation by providing the necessary plastic parts and instructions for converting the receiver wiring harnesses of their speed controls to work with all common receivers (Futaba, Airtronics, JR, and KO). The conversion is simple and takes only a couple of minutes. Similarly, while Novak and Tekin receivers are designed for Futaba connectors, they include plastic parts and instructions for converting the receiver wiring harnesses that plug into the receivers.
The servo manufacturers (all of whom make receivers) aren't so helpful. If you buy a servo from one manufacturer and a receiver from another (other than Novak and Tekin), you'll need help doing the wiring harness conversion.
Here is a key to the wiring of various servos:
Futaba: Black (-), Red (+), White (signal)
Airtronics: Red (+), Black (-), White (signal)
JR: Brown (-), Red (+) Orange (signal)
KO: Red (+), Black (-), Blue (signal)
(JR wins the non-conformist prize for choosing Brown for the ground wire!) Thus you can plug a JR servo directly into a Futaba receiver, but you must reverse the power and ground wires on Airtronics and KO servos before plugging them into a Futaba receiver or you will fry the servo.
There is a standard three-wire interface between receivers and servos (also receivers and speed controls): +5 volt power, ground, and signal. This receiver wiring harness originates in the servo (or speed control) and plugs into the receiver. But there is no standard for the colors of the three wires, their arrangement in the plastic connector body that plugs into the receiver, or the shape of the plastic connector body.
Novak and Tekin have dealt with this situation by providing the necessary plastic parts and instructions for converting the receiver wiring harnesses of their speed controls to work with all common receivers (Futaba, Airtronics, JR, and KO). The conversion is simple and takes only a couple of minutes. Similarly, while Novak and Tekin receivers are designed for Futaba connectors, they include plastic parts and instructions for converting the receiver wiring harnesses that plug into the receivers.
The servo manufacturers (all of whom make receivers) aren't so helpful. If you buy a servo from one manufacturer and a receiver from another (other than Novak and Tekin), you'll need help doing the wiring harness conversion.
Here is a key to the wiring of various servos:
Futaba: Black (-), Red (+), White (signal)
Airtronics: Red (+), Black (-), White (signal)
JR: Brown (-), Red (+) Orange (signal)
KO: Red (+), Black (-), Blue (signal)
(JR wins the non-conformist prize for choosing Brown for the ground wire!) Thus you can plug a JR servo directly into a Futaba receiver, but you must reverse the power and ground wires on Airtronics and KO servos before plugging them into a Futaba receiver or you will fry the servo.
03-17-2003 | 06:39 PM
#9
Originally posted by mitch179
I just plugged a futaba servo into my KO reciever and didnt even think about whether or not it was going to work hahaha but it did so thats lucky eh ?
I just plugged a futaba servo into my KO reciever and didnt even think about whether or not it was going to work hahaha but it did so thats lucky eh ?
Current KO gear (white plug?) uses the Futaba-J plug; think the KR297 was about when they switched.
I have older KO gear eg KR293 that requires the black KO/Sanwa-type plug, but KO have their own custom wiring layout (+ve in middle).
There is older KO gear still, with same wire layout but the plugs are as big as 2 motor brushes... haha, that plug is about as big as a whole modern RX these days.
03-17-2003 | 06:49 PM
#10
Tech Regular
Joined: Nov 2002
Posts: 283
From: Goldcoast, Aus
yeah mines pretty new (EX-1 Mars) .... the latest addition to my radio gear is a KO PDS 2143 FET servo....... HOLY SHIT this servo hauls so much arse!!! if u dont have one now go and buy one haha
oh yeah and the servo has a white plug...
(EX-1 Mars) .... the latest addition to my radio gear is a KO PDS 2143 FET servo....... HOLY SHIT this servo hauls so much arse!!! if u dont have one now go and buy one hahaoh yeah and the servo has a white plug...
03-17-2003 | 06:50 PM
#11
Originally posted by Darkman
I can get the KO servos for just over 100 AUD but dont want to get it unless it wont work properly... hey mitchie, does the KO servos have a 45 degree trimmed edge on their plug?
I can get the KO servos for just over 100 AUD but dont want to get it unless it wont work properly... hey mitchie, does the KO servos have a 45 degree trimmed edge on their plug?
KO makes good servos; sometimes its worthwhile just opening it up and replacing the lead - a good LHS will usually do it for you too. You can make a Fut-J plug fit into JR by cutting off the side tab and camferring 2 edges like you said.
Hitec makes good servos and sell them cheaply too. Can usually get them in suitable plugs, but I think their native plug is "JR" too.
Check out NOVAK PAGE to see the differences between 'old' plugs.
For 'new' KO plugs, try THIS PAGE.
03-17-2003 | 06:56 PM
#13
Thread Starter
Tech Addict
Joined: Oct 2002
Posts: 551
From: www.ozryderz.com
Mitch its at HobbyMania at HK.
WC, Im looking into Digital KO 2143FET or an Analog KO PS2173FET. They both run 6V so I should be okay with my 5 cell hump pack.
If that is the case, I just make sure that the servos come with the Futaba J style plugs and camfer the edges to make em fit into my JR receiver, and VOILA, tis should work?
WC, Im looking into Digital KO 2143FET or an Analog KO PS2173FET. They both run 6V so I should be okay with my 5 cell hump pack.
If that is the case, I just make sure that the servos come with the Futaba J style plugs and camfer the edges to make em fit into my JR receiver, and VOILA, tis should work?
03-17-2003 | 06:58 PM
#14
Originally posted by mitch179
yeah mines pretty new (EX-1 Mars) ...
yeah mines pretty new
(EX-1 Mars) ...
I've just gotten into collecting old KO gear too... just found this one "EX-1 Series II", granddaddy to Mars!! Does that body shape look familiar? Even uses the same module at the back, which was a big surprise.
03-17-2003 | 07:12 PM
#15
Joined: Sep 2001
Posts: 7,016
From: Mongville
I have still got one of the original KO radios, purchased off Dallas Gardner way back in 93.
Was still used until recently in my offroad car, but has recently been relegated to our Super Hornet, fun car.
The shape is still pretty much identical to the Mars of today
Was still used until recently in my offroad car, but has recently been relegated to our Super Hornet, fun car.
The shape is still pretty much identical to the Mars of today