spiftacu1ar

check out this servo:
[link=http://www.servocity.com/html/hsr-5995tg_ultra_torque.html]HSR-5995TG [/link]

first off, it is $115 which is no more the a z9000t or s

second, its got 417oz/in torq while maintaining a speed of .12 sec per 60 degree as well as all titanium gears.
THis thing is friggin amazing. It is shown as a robot servo, but has standard dimensions and has a normal backplate for use with stuff that doesnt need an output on both sides (like our savages. AWESOME.

:O :O :O :O :O :O :O :O :O :O :O :O :O :O :O :O :O :O :O :O

edit: its 541 oz/in torq if you put in 7.4v (not that reciever can handle it) Also, .12 sec per 60 degree is for 7.4 v, .15sec for 6v. Still awesome though.

joeseif

yes that might be the best one yet. How fast does it drain the battry?

spiftacu1ar

300mA/idle and 4.2 amps at lock/stall (6v batt)

so baiscally, if you have a 2100mah batt, it will last 30min if you are constantly stalling/locking it (which is pretty hard at 417oz/in torq)

burnchassis3

Says 180*
I dont know what the savage radius is ,but I dont think its 180*.
Does the "programable" part of that servo let you adjust the turning radius?
If not,180* and 500 in-oz of torque, something is gonna go.
Am I reading that right?
lol
CS

Chronic

The servos that we use for our trucks usually have 60 degrees of rotation. In order to use a servo capable of 180 degrees rotation you would have to limit it's travel via the EPA settings. The EPA setting has an effect on the signal resolution, and as you reduce EPA you also reduce resolution. The resolution is basically the amount of positions it can index the servo motor to. Lets say you were running one of the more common radios on the market, like the Airtronics MX3. That radio has a resolution of 1024 at 100% EPA. The 180 degree servo will require a baseline setting of 34% EPA to cut the travel down to 60 degrees so we can use it. That means resolution is also cut down to 34%... or 348. That means that the servo can be indexed 348 times across it's full travel, where a traditional 60 degree servo can be indexed 1024 times in the exact same setup. Not only is there the loss of precision movement, but also a loss of holding power and increased deadband. As you step up the ladder in radio quality, to say a Spektrum system that has a resolution of 4096, the losses compound quickly. Do NOT use this servo. Hi-tec does however offer a comparable servo made for us, it's the HS5955, and it is identical to the 5995 except that it has the needed 60 degrees of rotation.

You compared it to the JR DZ900T... and for our application, there is NO comparison. The JR blows it out of the water. Now if we were to compare the Hitec 5955 with the DZ9000T the decision would basically boil down to which brand you prefer. The specs of each are almost identical except that the Hitec has a 13oz higher stall torque, and your fingers aren't anywhere near precise enough to tell a difference between the two. I will personally take JR quality over Hitec any day.

pmeredith

Chronic, you are the electronics GURU. Nice right up.

Chronic

Well, I appreciate it... but really I'm not. I actually considered buying that servo one day after my Hitec 5645 took a dump, but I was advised not too. After doing some research I found out why.

Really though, the 5995 is a good quality high torque digital. It would still be a nice servo to use, just not the best setup considering it's cost. With a Spektrum and the 5995 it would still be comparable in those regards to the MX3 setup with a "normal" digital, and it will always have more holding power than an analog.

Vigilante212

Thats a robot servo go to hitecs site .

mdh1979

Hey Everyone

I think i've settled on the Hitec 5955 for the steering servo for my new X SS.

Now... What do you look for in a throttle servo? This is my first nitro vehicle so this is all completely new to me. Do you look for torque or speed? How's this sound? http://www2.towerhobbies.com/cgi-bin...9&I=LXMUS3&P=K


Matt

Chronic

That would make an excellent throttle/brake servo mdh1979. You need enough torque for the job(80-90oz.), and a fast transit time. A faster servo is going to give you better control and response.

***Make sure you use a good quality NiMH RX battery pack, at least 1400mah.

mdh1979

Thanks for the advice Chronic. Now just have to scrape up the cash. I don't need books next semester.[sm=shades_smile.gif]

About the battery... will do.[sm=thumbs_up.gif]

Can't wait for my truck to get here!


Matt

ravenlunatic

this servo is rated 416oz @ 7.4 and 333oz @ 6.0 at 7.4 would the rest of the electronics hold up? or fry up?

the HS 5955 TG is rated 250oz @ 4.8 and 333oz @ 6.0 same as the HSR 5995 TG but, this one is made for monster trucks

Vigilante212

I got the hs 5955tg. I wouldnt buy the hsr 5995 tg personally beacause even if your radio has EPA it prob wont be enough to limit it to 60 degrees so you would end up having to purchase the optional programer which can change EPA and other stuff but thats another 150.

spiftacu1ar

r u guys positive, i have a futuba 3003 servo (stock with controller) in front of me, and i can move the head 180 degrees. Maybe the reciver or controller automatically set the epa to 60 as the max epa. i dont know tho. I am just another newb

Vigilante212

Most stock servos only turn 90 degrees. Futabas site doesnt list max throw so I dont know. The thing is maybe you want to limit it below this so you truck doesnt turn as much but your remotes EPA is already at the low limit so youll be SOL.

ravenlunatic

vigi, how long have you had your HS 5955TG? has it given you any problems?

Vigilante212

I just got it in the mail today. It seems to be buzzing, but that could be because im testing it using 4AA instead of my hump pack. ill let you know how it works when I get that charged. It turns the wheels at a dead stop, but I dont have rubber on yet :|.


Doh my chargers dont have the adapter to charge my hump pack. Ill have to go pick one up, but not today.