Sanwa (Airtronics) problem in combination with savox HV servo's
#1
Sanwa (Airtronics) problem in combination with savox HV servo's
I'm having a serious electronic problem with my 1/8 nitro truggy setup.
To start, I had following setup
- Sanwa M12 transmitter
- Sanwa RX-451R reciever (from the M11X)
- Savox SB2273SG (Steering channel)
- Savox SB2274SG (Throttle channel)
- Robitronic electronical switch
- Mylaps transponder
- LRP lipo battery pack
On saterday I had a problem. The throttle channel was stuk in the full open position, far beyond the end point. My OS Speed engine died after almost 2 minutes of full throttle.
After recovering the truggy (nothing else broke) I started testing with another battery pack. Nothing happened anymore. I replaced the switch with a mechanical one and the transmiter was powered again. The servo was still in full throttle.
I started cleaning the truggy, replaced the engine and took a brand new reciever and everything worked again (serveral hours in between).
On sunday I had a similar problem in the final, only the steering channel was stuck this time (thank god) to full left, again beyond max EPA setting.
I immediatly replaced the battery pack and again the same behaviour. A bit frustrated I putted eveyrhing away.
On monday evening I unsrewed the servo horns and connected a battery and everything worked again!?? I replaced the reciever I was using saterday and that one also worked perfectly.
I'm a bit confused as the error happened with different switches and recievers. The electronical switch died btw. The only thing that stayed the same are the servo's.
Is it possible that there is an error in this series of servo's?
Recievers where responding on the other channel so oonly 1 servo at a time had an error.
Is it a power consumption problem? To much power drain for the sanwa recievers?
Anyone suggestions?
At this moment I'm thinking to replace the servo's by the 1267SG and 1268SG high voltage servo's.
To start, I had following setup
- Sanwa M12 transmitter
- Sanwa RX-451R reciever (from the M11X)
- Savox SB2273SG (Steering channel)
- Savox SB2274SG (Throttle channel)
- Robitronic electronical switch
- Mylaps transponder
- LRP lipo battery pack
On saterday I had a problem. The throttle channel was stuk in the full open position, far beyond the end point. My OS Speed engine died after almost 2 minutes of full throttle.
After recovering the truggy (nothing else broke) I started testing with another battery pack. Nothing happened anymore. I replaced the switch with a mechanical one and the transmiter was powered again. The servo was still in full throttle.
I started cleaning the truggy, replaced the engine and took a brand new reciever and everything worked again (serveral hours in between).
On sunday I had a similar problem in the final, only the steering channel was stuck this time (thank god) to full left, again beyond max EPA setting.
I immediatly replaced the battery pack and again the same behaviour. A bit frustrated I putted eveyrhing away.
On monday evening I unsrewed the servo horns and connected a battery and everything worked again!?? I replaced the reciever I was using saterday and that one also worked perfectly.
I'm a bit confused as the error happened with different switches and recievers. The electronical switch died btw. The only thing that stayed the same are the servo's.
Is it possible that there is an error in this series of servo's?
Recievers where responding on the other channel so oonly 1 servo at a time had an error.
Is it a power consumption problem? To much power drain for the sanwa recievers?
Anyone suggestions?
At this moment I'm thinking to replace the servo's by the 1267SG and 1268SG high voltage servo's.
#3
Setting was set to normal.
Setting RX-451R (M11X reciever):
Setting RX-461 (M12 telemetry reciever):
Extra info:
This was the 3rd round of the Dutch/Belgium championship, the other 2 I had no problems at all.
The place on the circuit was different and both very close to the driver stand.
Setting RX-451R (M11X reciever):
Setting RX-461 (M12 telemetry reciever):
Extra info:
This was the 3rd round of the Dutch/Belgium championship, the other 2 I had no problems at all.
The place on the circuit was different and both very close to the driver stand.
#4
Tech Champion
iTrader: (7)
Omg....that's gonna be a tough one. Normal mode usually solve it.
savox servo have known issue on power drain. Chances are high.... heat to your servo / receiver causing it to fail or any thermal shut down. But after you leave it for a while to cool it is working again.
maybe rnd 3 weather is hotter than rnd 1 and 2......over there ? If heat's a problem maybe you can try with a life rx battery 6.6 v.........it will drop the performance of the servo but it wil generate less heat.
the current, I am sure it only happen after you are on it for awhile.....
savox servo have known issue on power drain. Chances are high.... heat to your servo / receiver causing it to fail or any thermal shut down. But after you leave it for a while to cool it is working again.
maybe rnd 3 weather is hotter than rnd 1 and 2......over there ? If heat's a problem maybe you can try with a life rx battery 6.6 v.........it will drop the performance of the servo but it wil generate less heat.
the current, I am sure it only happen after you are on it for awhile.....
#5
It was warmer last weekend, max temp on saturday was like 20°C. Rnd 1 was like 5°C and Rnd 2 like 10 °C.
I've no faith in my electronical gear right now as it destroyed my OS Speed engine of 400€...
Anyone any idea how to test this? Something like heating it up with a hairdryer and keep on transmitting full brake/throttle and steering? Without driving it won't have any resistance, for simulating steering resistance I can put weight on the truggy.
The savox servo's are very powerfull and uses brushless motors, they are rated at 28kg and 0.095s/60° on steer and 25 kg and 0.08s/60°.
If the error occures in the servo itself I'm prepared to replace those with the SC-1267 and SC-1268. These are coreless servo's and all 4 team members are using those. 2 also with a M12 and 2 with a M11X. I have chosen to drive lipo's this season because the response of the servo's doesn't drop during a heat/final ans want to keep it this way.
If the error occures in the reciever I have a different problem but there are many drivers with the SC-1267 and SC-1268 icm the sanwa M11X and M12. Nobody had problems uptill now, even not the ones that are driving the savox servo's for years.
I've no faith in my electronical gear right now as it destroyed my OS Speed engine of 400€...
Anyone any idea how to test this? Something like heating it up with a hairdryer and keep on transmitting full brake/throttle and steering? Without driving it won't have any resistance, for simulating steering resistance I can put weight on the truggy.
The savox servo's are very powerfull and uses brushless motors, they are rated at 28kg and 0.095s/60° on steer and 25 kg and 0.08s/60°.
If the error occures in the servo itself I'm prepared to replace those with the SC-1267 and SC-1268. These are coreless servo's and all 4 team members are using those. 2 also with a M12 and 2 with a M11X. I have chosen to drive lipo's this season because the response of the servo's doesn't drop during a heat/final ans want to keep it this way.
If the error occures in the reciever I have a different problem but there are many drivers with the SC-1267 and SC-1268 icm the sanwa M11X and M12. Nobody had problems uptill now, even not the ones that are driving the savox servo's for years.
Last edited by Huske; 05-28-2013 at 12:03 PM.
#6
Can that receiver handle 8.4v lipos without a regulator? Just because the servos are HV doesn't mean the receiver is.
Also Savox claims that their servos will work in SHR mode. This is from Mirco at LRP:
Savöx Servos are compatible with Sanwa without any problem.
"With the RX451R receiver you can use FHSS-3. If you are setting up your transmitter under SET-UP you can adjust to FH3F and then select SHR for the Savöx servo. Then this channel will work with the highest data rate and the servo will work the best way possible."
Also Savox claims that their servos will work in SHR mode. This is from Mirco at LRP:
Savöx Servos are compatible with Sanwa without any problem.
"With the RX451R receiver you can use FHSS-3. If you are setting up your transmitter under SET-UP you can adjust to FH3F and then select SHR for the Savöx servo. Then this channel will work with the highest data rate and the servo will work the best way possible."
#7
A fully charged 6.0V NiHM has also a much greater voltage than 6.0V. I don't think this should be a problem.
Lot's of people uses lipo on their 1/8 nitro buggy/truggy.
#8
Tech Champion
iTrader: (44)
I'm having a serious electronic problem with my 1/8 nitro truggy setup.
To start, I had following setup
- Sanwa M12 transmitter
- Sanwa RX-451R reciever (from the M11X)
- Savox SB2273SG (Steering channel)
- Savox SB2274SG (Throttle channel)
- Robitronic electronical switch
- Mylaps transponder
- LRP lipo battery pack
On saterday I had a problem. The throttle channel was stuk in the full open position, far beyond the end point. My OS Speed engine died after almost 2 minutes of full throttle.
After recovering the truggy (nothing else broke) I started testing with another battery pack. Nothing happened anymore. I replaced the switch with a mechanical one and the transmiter was powered again. The servo was still in full throttle.
I started cleaning the truggy, replaced the engine and took a brand new reciever and everything worked again (serveral hours in between).
On sunday I had a similar problem in the final, only the steering channel was stuck this time (thank god) to full left, again beyond max EPA setting.
I immediatly replaced the battery pack and again the same behaviour. A bit frustrated I putted eveyrhing away.
On monday evening I unsrewed the servo horns and connected a battery and everything worked again!?? I replaced the reciever I was using saterday and that one also worked perfectly.
I'm a bit confused as the error happened with different switches and recievers. The electronical switch died btw. The only thing that stayed the same are the servo's.
Is it possible that there is an error in this series of servo's?
Recievers where responding on the other channel so oonly 1 servo at a time had an error.
Is it a power consumption problem? To much power drain for the sanwa recievers?
Anyone suggestions?
At this moment I'm thinking to replace the servo's by the 1267SG and 1268SG high voltage servo's.
To start, I had following setup
- Sanwa M12 transmitter
- Sanwa RX-451R reciever (from the M11X)
- Savox SB2273SG (Steering channel)
- Savox SB2274SG (Throttle channel)
- Robitronic electronical switch
- Mylaps transponder
- LRP lipo battery pack
On saterday I had a problem. The throttle channel was stuk in the full open position, far beyond the end point. My OS Speed engine died after almost 2 minutes of full throttle.
After recovering the truggy (nothing else broke) I started testing with another battery pack. Nothing happened anymore. I replaced the switch with a mechanical one and the transmiter was powered again. The servo was still in full throttle.
I started cleaning the truggy, replaced the engine and took a brand new reciever and everything worked again (serveral hours in between).
On sunday I had a similar problem in the final, only the steering channel was stuck this time (thank god) to full left, again beyond max EPA setting.
I immediatly replaced the battery pack and again the same behaviour. A bit frustrated I putted eveyrhing away.
On monday evening I unsrewed the servo horns and connected a battery and everything worked again!?? I replaced the reciever I was using saterday and that one also worked perfectly.
I'm a bit confused as the error happened with different switches and recievers. The electronical switch died btw. The only thing that stayed the same are the servo's.
Is it possible that there is an error in this series of servo's?
Recievers where responding on the other channel so oonly 1 servo at a time had an error.
Is it a power consumption problem? To much power drain for the sanwa recievers?
Anyone suggestions?
At this moment I'm thinking to replace the servo's by the 1267SG and 1268SG high voltage servo's.
#9
The other team drivers have all the SC-1267SG and SC-1268SG and doesn't have any problems with them so far.
I'm the only running the SB-2273SG and SB-2274SG servo's in my truggy. In my buggy I'm team compliant and have also the SC-1267SG and SC-1268SG servo's running without any problems uptill now.
So I'm really wondering what type of servo's you are running atm.
#10
Tech Champion
iTrader: (44)
Which servo's do you have?
The other team drivers have all the SC-1267SG and SC-1268SG and doesn't have any problems with them so far.
I'm the only running the SB-2273SG and SB-2274SG servo's in my truggy. In my buggy I'm team compliant and have also the SC-1267SG and SC-1268SG servo's running without any problems uptill now.
So I'm really wondering what type of servo's you are running atm.
The other team drivers have all the SC-1267SG and SC-1268SG and doesn't have any problems with them so far.
I'm the only running the SB-2273SG and SB-2274SG servo's in my truggy. In my buggy I'm team compliant and have also the SC-1267SG and SC-1268SG servo's running without any problems uptill now.
So I'm really wondering what type of servo's you are running atm.
#11
It is the same series of servo's. They are brushless aswell. The SB-2271SG is a bit less powerfull but has much more speed. Current drain will be almost the same.
The other ones are coreless, not brushless. I think there is a difference...
I will try to simulate this with a hairdryer/heatgun tomorrow.
The other ones are coreless, not brushless. I think there is a difference...
I will try to simulate this with a hairdryer/heatgun tomorrow.
#12
Funny how these problems always seem to involve Savox servos
#13
I couldn't laugh with my 400€ broken OS Speed engine .
I couldn't laugh that I had to give up after 15 minutes in the A final. Our team could have reached position 1 till 5 instead of 1 till 4 now .
But I need to now the problem so that it won't occur with my brand new OS Speed specII engine. Maybe I should by Hitec servo's ...
I couldn't laugh that I had to give up after 15 minutes in the A final. Our team could have reached position 1 till 5 instead of 1 till 4 now .
But I need to now the problem so that it won't occur with my brand new OS Speed specII engine. Maybe I should by Hitec servo's ...
#14
I understand the frustration and that's why I do NOT use Hitecs either. Had too many throttle servos die on me. For me, Futabas have been the most reliable I have ever used with Sanwa/Airtronics a distant second. Savox seem to be excellent as well except the things are such amp suckers that people sometimes have weird problems like this, especially in electric racing where you are dealing with weak BECs in the speedos. That may or may not be the problem here. You might of just lost the receiver for no apparent reason. It does happen sometimes.
Last edited by wingracer; 05-28-2013 at 08:38 PM.
#15
My MT4 and Savox servos couldn't get along with each other until a glitch buster came in. If you're using Sanwa, I would stick with Sanwa servos too. Savox are targeted for the economy market. The M12 deserves better. Hope this helps, Cheers.