JR servo load alarm system using Xbus
11-29-2016, 10:37 AM
#2
My Feedback: (5)
When the load on the servo exceeds the set alarm percentage, the servo motor emits a faint high-pitch tone in the same manner as an ESC causes an electric motor on a plane to act as its speaker. I was experimenting with it using an NX588 servo driven by 4.8V NiCd pack. I had to put my ear next to the servo to hear it. The tone might be louder had I used a higher voltage battery and a different servo.
The only literature that I’ve seen on the subject is the XG addendum to the instruction manual, e.g., V0001-0005 to the XG14.
Allan
The only literature that I’ve seen on the subject is the XG addendum to the instruction manual, e.g., V0001-0005 to the XG14.
Allan
11-29-2016, 11:49 AM
#4
When the load on the servo exceeds the set alarm percentage, the servo motor emits a faint high-pitch tone in the same manner as an ESC causes an electric motor on a plane to act as its speaker. I was experimenting with it using an NX588 servo driven by 4.8V NiCd pack. I had to put my ear next to the servo to hear it. The tone might be louder had I used a higher voltage battery and a different servo.
The only literature that I’ve seen on the subject is the XG addendum to the instruction manual, e.g., V0001-0005 to the XG14.
Allan
The only literature that I’ve seen on the subject is the XG addendum to the instruction manual, e.g., V0001-0005 to the XG14.
Allan
Last edited by warbird_1; 11-29-2016 at 11:52 AM.
11-29-2016, 05:42 PM
#5
My Feedback: (5)
While in-flight warning would be beneficial that is not what is described in the addendum. No reference is made to the transmitter in the section about "Additional parameters for NX servos." When the alarm is set, the servo will beep under load.
It shouldn’t be too difficult to implement in-flight servo overload warning in the future. There is already two-way communication between the transmitter and servo. For the present, the alarm seems to be only an aid in setting up the servos while on the ground. I would like to be mistaken.
Allan
It shouldn’t be too difficult to implement in-flight servo overload warning in the future. There is already two-way communication between the transmitter and servo. For the present, the alarm seems to be only an aid in setting up the servos while on the ground. I would like to be mistaken.
Allan
11-29-2016, 06:40 PM
#6
While in-flight warning would be beneficial that is not what is described in the addendum. No reference is made to the transmitter in the section about "Additional parameters for NX servos." When the alarm is set, the servo will beep under load.
It shouldn’t be too difficult to implement in-flight servo overload warning in the future. There is already two-way communication between the transmitter and servo. For the present, the alarm seems to be only an aid in setting up the servos while on the ground. I would like to be mistaken.
Allan
It shouldn’t be too difficult to implement in-flight servo overload warning in the future. There is already two-way communication between the transmitter and servo. For the present, the alarm seems to be only an aid in setting up the servos while on the ground. I would like to be mistaken.
Allan
A beep (high frequency) sound is used to provide feedback on servo load. Set the
percentage of maximum load to alarm at.
To me, it would make no sense to have the servo beep ..the servo may be fine on the ground but be overloaded in flight especially at high speed , high G maneuvers. that's what my understanding is . i can see where a servo could be overloaded on the ground due to stiff control surfaces or binding . if that's the case , the alarm sys is worthless IMO. i have an NX588 servo that i tried to stall on the bench. even after tring all types of settings . i never got either the radio or the servo to make noise. my thoughts were the alarm sys rode on the back of the telemetry sys.
Last edited by warbird_1; 11-29-2016 at 06:43 PM.
11-29-2016, 09:48 PM
#7
the addendum doesn't refer to either the transmitter or the servo producing a " sound" so i have to refer to jr to clarify just what is supposed to be making the " beep" .
A beep (high frequency) sound is used to provide feedback on servo load. Set the
percentage of maximum load to alarm at.
To me, it would make no sense to have the servo beep ..the servo may be fine on the ground but be overloaded in flight especially at high speed , high G maneuvers. that's what my understanding is . i can see where a servo could be overloaded on the ground due to stiff control surfaces or binding . if that's the case , the alarm sys is worthless IMO. i have an NX588 servo that i tried to stall on the bench. even after tring all types of settings . i never got either the radio or the servo to make noise. my thoughts were the alarm sys rode on the back of the telemetry sys.
A beep (high frequency) sound is used to provide feedback on servo load. Set the
percentage of maximum load to alarm at.
To me, it would make no sense to have the servo beep ..the servo may be fine on the ground but be overloaded in flight especially at high speed , high G maneuvers. that's what my understanding is . i can see where a servo could be overloaded on the ground due to stiff control surfaces or binding . if that's the case , the alarm sys is worthless IMO. i have an NX588 servo that i tried to stall on the bench. even after tring all types of settings . i never got either the radio or the servo to make noise. my thoughts were the alarm sys rode on the back of the telemetry sys.
If you are not happy with Allan's attempt to help you, to the point of being rude, I suggest you contact the new USA distributor for JR.....
11-30-2016, 04:01 AM
#8
Allan is one of our most knowledgeable contributors and can help with numerous different radios. Since this forum was abandoned by Horizon/JR some eight years or so ago, the only folks from "JR" answering questions here is Andy Kunz who will address issues related to the JR radios equipped with the Spektrum RF deck.
If you are not happy with Allan's attempt to help you, to the point of being rude, I suggest you contact the new USA distributor for JR.....
If you are not happy with Allan's attempt to help you, to the point of being rude, I suggest you contact the new USA distributor for JR.....
Last edited by warbird_1; 11-30-2016 at 08:47 AM.
11-30-2016, 08:44 AM
#9
While in-flight warning would be beneficial that is not what is described in the addendum. No reference is made to the transmitter in the section about "Additional parameters for NX servos." When the alarm is set, the servo will beep under load.
It shouldn’t be too difficult to implement in-flight servo overload warning in the future. There is already two-way communication between the transmitter and servo. For the present, the alarm seems to be only an aid in setting up the servos while on the ground. I would like to be mistaken.
Allan
It shouldn’t be too difficult to implement in-flight servo overload warning in the future. There is already two-way communication between the transmitter and servo. For the present, the alarm seems to be only an aid in setting up the servos while on the ground. I would like to be mistaken.
Allan
11-30-2016, 11:17 AM
#10
My Feedback: (5)
WB-1,
No offense was taken. I enjoyed our discussion as it gave me an opportunity to explore the workings of XBus. Because of the type and size of the planes I fly, I haven’t been able to find a practical use for it despite having most of the paraphernalia. It remains a solution in search of a problem.
My first impression of the alarm’s purpose was the same as yours. After coming to the conclusion it wasn’t telemetering info back, my opinion of its usefulness was only slightly less harsh than yours.
Allan
No offense was taken. I enjoyed our discussion as it gave me an opportunity to explore the workings of XBus. Because of the type and size of the planes I fly, I haven’t been able to find a practical use for it despite having most of the paraphernalia. It remains a solution in search of a problem.
My first impression of the alarm’s purpose was the same as yours. After coming to the conclusion it wasn’t telemetering info back, my opinion of its usefulness was only slightly less harsh than yours.
Allan
11-30-2016, 01:16 PM
#11
WB-1,
No offense was taken. I enjoyed our discussion as it gave me an opportunity to explore the workings of XBus. Because of the type and size of the planes I fly, I haven’t been able to find a practical use for it despite having most of the paraphernalia. It remains a solution in search of a problem.
My first impression of the alarm’s purpose was the same as yours. After coming to the conclusion it wasn’t telemetering info back, my opinion of its usefulness was only slightly less harsh than yours.
Allan
No offense was taken. I enjoyed our discussion as it gave me an opportunity to explore the workings of XBus. Because of the type and size of the planes I fly, I haven’t been able to find a practical use for it despite having most of the paraphernalia. It remains a solution in search of a problem.
My first impression of the alarm’s purpose was the same as yours. After coming to the conclusion it wasn’t telemetering info back, my opinion of its usefulness was only slightly less harsh than yours.
Allan
i have been around and around with JR and even it's owner at JR Americas about the tech support issue . It doesn't matter if you have a XG6 or a 28X , it's no good to you if you can't get help with problems. And what i think is worst is i think, they think is you should rely on the web to solve your problems. As far as Xbus goes , i think it's the best thing JR ever did. i love it. it makes things a lot easier and cheaper to use.When i came across the alarm system , i was excited because i really would like something like that in the new jet i'm putting together . The jet requires mini servos on the elevator and i'm not pleased with the setup. So i was thinking the alarm system would be great because i thought it would notify me if i was pushing the servo's to hard only to find out it doesn't , That was a real bummer. So after i got the 28 and sold my 12x it's been a roller coaster ride of Frustration and excitement.i plan on using the heavy Xbus cable with power to drive the tail servos as they are 4' from the receiver. thanks for your input and help,WB_1
