Finally I have received my samples of the mysterious and elusive Hitec HSR-5990TG and HSR-5980SG standard case (with integrated) pivot robot servos. The torque specs for them both are exactly the same as the HS-5955MG servo, that being 333oz.in. But they do list the extended torque of 417oz.in at 7.4vdc.
They are 1100uS - 1500uS - 1900uS with 180° range.
So 1900uS - 1100uS = 800uS range across 180° makes .225° per uS resolution.
They’re 180° out of the box with no programmer required. The 5990 is titanium gear and the 5980 is steel gear. Here is a list of the features…
o Programmable digital amplifier with mosfet drive
o Durable steel gears with dual ball bearing
o Ultra hardness shaft with 2 axial metal bushing
o Water and dust tight
o Bottom side axial mount hole
o Hitec HMI serial interface protocol
o Parameter setting capability*
o Data feedback (position/current/voltage)
o Chain interface up to 128 servos
o Overload protection
Additional servo setting program required.
I also received one of the HSR-5498SG servos. It’s a stronger robonova servo, with the following specs.
8498 = 103 oz.in. at 6vdc
5498 = 153 oz.in. at 6vdc and 187 oz.in. at 7.4vdc
COOL! If only they could be less expensive than the 5955 I would buy some thaty thing on the botton is cool (lost the word and I dont feel like looking mit up )
I believe they will use the same format as the 8498 servos used in the RoboNova. They call it HMI Protocol, Serial Interface, PWM. I will admit I don’t know all of the details of this protocol. I think they make you read a pulse width to read the position back from the servo. If someone knows more about it then please post. I’m pretty confident someone will hack a serial com method if it’s in there as an undocumented feature. But again I’m not sure I’m right about this.
I’m looking to purchase some beefier servos for my Triped design, and was considering picking up 6 HS-5645’s or 5955mg’s. However, the 5980sg sounds interesting. Do you have any idea as to the pricing in comparison to the others? Should I hold off and wait?
The 5980 and 5990 are SES compatible, but they have the integrated pivot point like the original 5995. I do not see a replacement bottom case, but it might have been left out of the demo units I received. If not you can take advantage of the pivot point by enlarging the hole in the ASB-04. This actually makes it a bit stronger assembly.
I expect the 5990 to be the same as the 5995 it is replacing. $114.99 they are prowd of it. I’d just be guessing on the 5980 but it has to be cheaper than the 5990 due to the steel gears instead of the titanium ones.
ok cool! I will probably make some of my own brackets so the pivot point will come in handy!
but, the pivot point, how can I connect it to a ‘‘C’’ bracket? just using a screw that goes in the pivot point? I don’t quite understand how it could work. thanks
Sam
I am a student from Holland, and I am currently busy with my internship period with a German company that builds sailplanes.
To open and close the watertank-valves we want to use the 5980SG servo, because of its high power.
Reading this discussion tells me that you guys know rather much about these things! Therefore also my post here…
I’ve already gathered a little bit information (the pdf-file with the technical specifications did help me a lot), however I still need a little bit more to be able to calculate the whole thing through.
Does anyone has any information about the current when the servo is used?
The specification form only gives the current at no load running (300mA), but no information about the currents during use are mentioned. It would surprise me if the current at maximum load equals the stall current (4200mA).
Any information about this would be very welcome! (e-mail is always possible at this address: [email protected])
thaty thing on the botton is cool (lost the word and I dont feel like looking mit up )
drools woowww, thats look great, but as sam said too bad they’re expensive otherwose id be all over them 
