servo help 2

[audiobranz]

I need to buy 3 servos 2 for streering & 1 for throttle/brake I'm looking at 2 waterproof savox servos part# SAVSW0240MG or SAVSW0241MG is that a good choice? I'm not sure what servo I'm getting for my throttle/brake any recommendations...thanks for any help I appreciate it

 

[rroberson7805]

Savox is great in my opinion but don't know a lot about them and that's what I have read anyways, reviews online look good. I got this hexfly at a good deal local for my throttle/brake for a quick fix when mine went out and so far so good. I wold like a savox for my steering being it's more better brand and steering servo is weak on these things to begin with. Seems like a lot of guys get on here once a week sometimes so be patient on replies. There is some good info once they do reply. Kind of new myself.

 

[ROCKHEART]

Can't comment on savox as I don't own any. I run a pair of turnigy 1270 for steering and they're great value for money. They're also hv servos so upgrading to lipo will increase time in between rx charging.

 

[Ice_2k]

I think HV means they support 7.2V and will provide more torque. I don't think battery life increases because of that.

 

[ROCKHEART]

Sorry I meant running lipo will give you more runtime. Currently run mine on nimh and when the voltage drops to a certain point they refuse to do their job. They're very power hungry lol.

 

[Greggfromohio]

Traxxas 2075 works well for throttle/brake, it's also waterproof

 

[Ildy666]

Isn't hex fly stock redcat servo's???

 

[Ice_2k]

I'm using Hitec HS-5645MG for throttle/brake, very happy with it. Lots of power, locks all 4 wheels on brake even after 2 hours of running (using DDM's 5Ah 6V pack)

 

[GCraig]

I need to buy 3 servos 2 for streering & 1 for throttle/brake I'm looking at 2 waterproof savox servos part# SAVSW0240MG or SAVSW0241MG is that a good choice? I'm not sure what servo I'm getting for my throttle/brake any recommendations...thanks for any help I appreciate it

I use the Savox SC-1256tg for my troddle and brake. I use 1 Savox SV-0236mg 1/5 scale servo for my steering on my Redcat Rampage MT Pro.

I need to buy 3 servos 2 for streering & 1 for throttle/brake I'm looking at 2 waterproof savox servos part# SAVSW0240MG or SAVSW0241MG is that a good choice? I'm not sure what servo I'm getting for my throttle/brake any recommendations...thanks for any help I appreciate it

 

[GTi_Leo]

Savox is great in my opinion but don't know a lot about them and that's what I have read anyways, reviews online look good. I got this hexfly at a good deal local for my throttle/brake for a quick fix when mine went out and so far so good. I wold like a savox for my steering being it's more better brand and steering servo is weak on these things to begin with. Seems like a lot of guys get on here once a week sometimes so be patient on replies. There is some good info once they do reply. Kind of new myself.

I find the steering servos on the Rampages to be rather good, I have a hitec 5765mg and it keeps burning out on my XB after about 45 minutes of use, the stock one has lasted. from what I've read though the hexfly throttle servos tend to go and when they do they burn out at WOT so I replaced it with a spectrum servo.

since the last time I had my steering servo replaced by hitec I've just left it in the box and the stock servo in. I'm iffy on using it now

 

[GTi_Leo]

Sorry I meant running lipo will give you more runtime. Currently run mine on nimh and when the voltage drops to a certain point they refuse to do their job. They're very power hungry lol.

maybe that's my issue with my hitech 5765, I'm using a 6 volt pack when they can support 7.2 volts. I asked hitech after my second one burnt out if that would make a difference, they just told me the extra torque will make it better, nothing about the die off of the battery or how much power it chews up

 

[Ice_2k]

They should run even more reliable at 6V.

 

[GTi_Leo]

They should run even more reliable at 6V.

how would it be less reliable on 7.2volts then 6? it wouldn't have the torque and being an electrician I know at a lower voltage it'll want to pull more amperage and heat up the board and motor more. it'll also drain the battery quicker

 

[Wayne]

Make sure you set the end points on the Hi Tec 5765. If they are not set correctly you can burn the servo up quickly.

 

[Ice_2k]

how would it be less reliable on 7.2volts then 6? it wouldn't have the torque and being an electrician I know at a lower voltage it'll want to pull more amperage and heat up the board and motor more. it'll also drain the battery quicker

More stress on everything when running higher torque?

 

[ika]

how would it be less reliable on 7.2volts then 6? it wouldn't have the torque and being an electrician I know at a lower voltage it'll want to pull more amperage and heat up the board and motor more. it'll also drain the battery quicker

electric motor has fixed min-max internal resistance , when motor is locked int resistance is at lower point . so when higher voltage applyed , more current is flows, than at lower voltage.

 

[audiobranz]

new savox

I have dual streering do I buy 2 savox sv-0236mg

 

[GTi_Leo]

electric motor has fixed min-max internal resistance , when motor is locked int resistance is at lower point . so when higher voltage applyed , more current is flows, than at lower voltage.

not sure I totally agree, a motor doesn't really have much resistance its an inductive load, its just a bunch of windings, so its current draw is based on eddie currents creating "resistance" limiting the flow of current. eddie currents are dependent on voltage and current, less voltage more current, more voltage less current. locked rotor current will always be higher on a lower voltage then higher voltage.

http://www.answers.com/Q/What_is_locked_rotor_current

heres a better explanation then I can give

I'm not sure if these servos are different considering they are a brushless motor and require an internal board that can vary the power. I don't want to highjack the thread with talks about motor workings so if you have another explanation that I may be missing please PM me, I like learning new things

 

[GTi_Leo]

More stress on everything when running higher torque?

that I can see but most of these servos are rated for them so their internals should be sufficient for this, the linkages on the other hand are a different story.

with my servos its the motor that has been burning out and being replaced