*Servo/PT Problem*
#1
*Servo/PT Problem*
First of all sorry for double posting, I also asked this question in the JRX-S forum, but nobody's on right now, so here we go:
OK I got a little problem.
About two weeks ago, I installed a spektrum in my Helios. Then I installed a Personal Transponder.
->This is what's going on: when the batteries start to dump, the servo movement slows down and when I pull on the throttle, the transponder's LED dimms down and out. When I release the throttle, the LED lights up again.
I suppose the servo needs more current or something, or the GTX can't supply enough for the SPEKTRUM, PT, and 94360Z servo do you think I need a capacitor anywhere? (only capacitor on the car is the big one that came with the GTX)
So, in the beginning, the car drives LIKE A DREAM, then I have this problem, before the end of the race.
I don't have shitty batteries and tried three of my packs. Same problem.
Thanks in advance!
You can see my setup below.
OK I got a little problem.
About two weeks ago, I installed a spektrum in my Helios. Then I installed a Personal Transponder.
->This is what's going on: when the batteries start to dump, the servo movement slows down and when I pull on the throttle, the transponder's LED dimms down and out. When I release the throttle, the LED lights up again.
I suppose the servo needs more current or something, or the GTX can't supply enough for the SPEKTRUM, PT, and 94360Z servo do you think I need a capacitor anywhere? (only capacitor on the car is the big one that came with the GTX)
So, in the beginning, the car drives LIKE A DREAM, then I have this problem, before the end of the race.
I don't have shitty batteries and tried three of my packs. Same problem.
Thanks in advance!
You can see my setup below.
#2
Super Moderator
iTrader: (239)
Originally Posted by tc3blue
First of all sorry for double posting, I also asked this question in the JRX-S forum, but nobody's on right now, so here we go:
OK I got a little problem.
About two weeks ago, I installed a spektrum in my Helios. Then I installed a Personal Transponder.
->This is what's going on: when the batteries start to dump, the servo movement slows down and when I pull on the throttle, the transponder's LED dimms down and out. When I release the throttle, the LED lights up again.
I suppose the servo needs more current or something, or the GTX can't supply enough for the SPEKTRUM, PT, and 94360Z servo do you think I need a capacitor anywhere? (only capacitor on the car is the big one that came with the GTX)
So, in the beginning, the car drives LIKE A DREAM, then I have this problem, before the end of the race.
I don't have shitty batteries and tried three of my packs. Same problem.
Thanks in advance!
You can see my setup below.
OK I got a little problem.
About two weeks ago, I installed a spektrum in my Helios. Then I installed a Personal Transponder.
->This is what's going on: when the batteries start to dump, the servo movement slows down and when I pull on the throttle, the transponder's LED dimms down and out. When I release the throttle, the LED lights up again.
I suppose the servo needs more current or something, or the GTX can't supply enough for the SPEKTRUM, PT, and 94360Z servo do you think I need a capacitor anywhere? (only capacitor on the car is the big one that came with the GTX)
So, in the beginning, the car drives LIKE A DREAM, then I have this problem, before the end of the race.
I don't have shitty batteries and tried three of my packs. Same problem.
Thanks in advance!
You can see my setup below.
#4
It sounds like your servo is pulling some major amps and it is dropping the voltage to where it will cut off the servo/pt.
I had the same problem with my spektrum/ko servo...this is what i did to fix it and i have never had a problem since:
I used a servo wire that i soldered to a novak capacitor (just the positive and negative obviously) and plug that servo wire connector - that is only connected to the capacitor - it looks funny, but you don't have to solder a capactor to anything but the connector you use to put in one of the extra connections in the receiver (if your receiver does not have enough plug-ins, just buy a "y-style" adapter - this is what i had to do)
What is happening it sounds like is the voltage/amps gets high enough from the servo, which then pulls the voltage down in the receiver, then the receiver goes into failsafe mode. What a capacitor will do is "store" a little voltage/amps/power so it keeps the power at a nice steady level - and your spektrum has enough power.
As you can tell, I am not electronically oriented, but i can e-mail you a pic of what i did - super easy fix and it should cost you no more than like $5-$7 and take no more than 5-10 minutes
If you look on the spektrum thread here, you will find a little better explanation than the lame layman version i just gave.
mcgoo
I had the same problem with my spektrum/ko servo...this is what i did to fix it and i have never had a problem since:
I used a servo wire that i soldered to a novak capacitor (just the positive and negative obviously) and plug that servo wire connector - that is only connected to the capacitor - it looks funny, but you don't have to solder a capactor to anything but the connector you use to put in one of the extra connections in the receiver (if your receiver does not have enough plug-ins, just buy a "y-style" adapter - this is what i had to do)
What is happening it sounds like is the voltage/amps gets high enough from the servo, which then pulls the voltage down in the receiver, then the receiver goes into failsafe mode. What a capacitor will do is "store" a little voltage/amps/power so it keeps the power at a nice steady level - and your spektrum has enough power.
As you can tell, I am not electronically oriented, but i can e-mail you a pic of what i did - super easy fix and it should cost you no more than like $5-$7 and take no more than 5-10 minutes
If you look on the spektrum thread here, you will find a little better explanation than the lame layman version i just gave.
mcgoo
#5
I used a servo wire that i soldered to a novak capacitor
Could you send me a pic/pics please? at [email protected]
Thanks a lot!
#6
here is a quote by PitCrew in the spektrum thread:
hope this helps
I used a Novak 4700 mp capacitor and wired it to a servo plug and pluged it into the Batt/Aux slot on the receiver...The Cap solves all the problems. If fact, if I just unplug it, the car goes nuts, then plug it in, everything is smooooth....Dont forget that the receiver itselft draws TWICE as much current as a standard receiver.
#8
should be fine, if it plugs into the reciever, and you have extra servo wire with it, it will be perfect
#10
so I should just get another one of these, right?
#12
as long as it is the 4700 or bigger, from what i have read, alot of folks have tried smaller capacitors, but they were not big enough...i just bought the novak b/c that is what my LHS had available.
mcgoo
mcgoo
#14
that is exactly what mine looks like (besides the novak part) - thanks
#15
Hey,
I went to my LHS today to get the capacitor, but they didn't have any.
So I went to Radioshack and got a 4700mf 35V axial capacitor.
I'll order a novak one online today, but I was just wondering, is it OK to use this 4700 35v capacitor till I get the novak one?(the novak one was 10v i think)
Thanks,
Dan
I went to my LHS today to get the capacitor, but they didn't have any.
So I went to Radioshack and got a 4700mf 35V axial capacitor.
I'll order a novak one online today, but I was just wondering, is it OK to use this 4700 35v capacitor till I get the novak one?(the novak one was 10v i think)
Thanks,
Dan