Any experience with Cirrus servos? Any sources for cheap servos?

[nleahcim]

Hi - I need to buy 18 micro/mini (29.8X12X29.6mm) servos (I don't get this - some servos of that size are labeled micros, others of that size are labeled mini)

Anyways - the Hitec HS-81MG was reccomended to me. Best price I've found on them so far is $20 each: http://www.hobbypeople.net/gallery/759296.asp.

While I was browsing hobbypeople I found the Cirrus CS-13 for $12: http://www.hobbypeople.net/gallery/444055.asp.

Specs are pretty similar:
(mass, speed, torque)
Hitec: 0.58oz, 0.11sec/60°, 36.1 oz-in
Cirrus: 0.46oz, 0.13sec/60°, 36 oz-in

I believe the Cirrus has plastic gears though, while the HS-81MG has metal gears, which is a definite plus for the Hitec. Also - the Hitec torque rating is at a supply voltage of 4.8V, while I'm not sure what the Cirrus supply voltage is, so the Hitec could easily have alot more torque than the Cirrus - it's hard to say without a spec sheet for the CS-13. But at total cost of $216 for the Cirrus Vs. $360 for the Hitec (for 18 servos) - the Cirrus is looking attractive. Unfortunately - I've been able to find very little info on the Cirrus servos - I can't even find the manufacturer's website.

Any suggestions? Thanks!

[Rtsbasic]

I'd go with the Hitec units, if nothing else you know where to send it to under warranty and its a known name. The cheaper Cirrus servo may well break after 2 runs, what would you do with it then? Could potentially be a waste of $216.

Personally I'd look at a GWS Pico mini servo, the guy over at www.b-p-p.com has them in stock and sells them for mini-t's, I used one for months in my mini with no problems, smaller/cheaper than the hitec too and I think a tad faster. GWS is a very well known name which is a plus as well.

[gizmoguy303]

What are you building? First the thread about a vehicle that can carry a load and now you're ordering 18 servos?!?? :D

Just curious - whatever you're making, it sounds cool. :cool:

[nleahcim]

What are you building? First the thread about a vehicle that can carry a load and now you're ordering 18 servos?!?? :D

Just curious - whatever you're making, it sounds cool. :cool:
Well - I'm very involved with robotics. The vehicle that can carry a big load is designed to be a testbed for a group called the "Aerial Robotics Club" in which we are making a helicopter autonomous. The idea is to get everything fully functional on the RC car (we eventually chose an E-maxx), then move it over to the much more complicated helicopter.

These 18 servos are for a different project though - a hexapod with 3 dof legs. This one's a personal project that I'm just working on over the summer. Man I'm such a geek...

[nleahcim]

I'd go with the Hitec units, if nothing else you know where to send it to under warranty and its a known name. The cheaper Cirrus servo may well break after 2 runs, what would you do with it then? Could potentially be a waste of $216.

Personally I'd look at a GWS Pico mini servo, the guy over at www.b-p-p.com has them in stock and sells them for mini-t's, I used one for months in my mini with no problems, smaller/cheaper than the hitec too and I think a tad faster. GWS is a very well known name which is a plus as well.
Can you link me to those? I couldn't find them on their website. I've been doing some reading - and it seems Cirrus is a hobbypeople company - and they're for the most part just other companies servos with cirrus labels on them - so maybe they won't be too bad? Not sure...

[ikraj]

GET the HITEC servos...you are building a neat project and you do not want failures. HITEC makes very good servos. There is a big diff between CHEAP and INEXPENSIVE...you are looking for INEXPENSIVE, right? YOu sound like a smart person, keep the good work! I hope your POD kicks b.. GOOD LUCK. Send me some pictures when you finish it.[QUOTE]

[adam lancia]

you could also try bluebird servos. their avaliable at blasapr.com (i think that's right...?)

adam

[gizmoguy303]

Sounds cool. I have been strongly thinking about majoring in electronic engineering and doing something in robotics for some time now. The field sounds challenging and rewarding, but most of all, fun! :D

[nleahcim]

Sounds cool. I have been strongly thinking about majoring in electronic engineering and doing something in robotics for some time now. The field sounds challenging and rewarding, but most of all, fun! :D
Hmmmm... the education part is most of all hard! Good gosh - I remember times when I'd be up late doing homework, and my roommates would go out to the bars, then 5 hours later they'd come back drunk and go to bed, I'd still be working on homework, then they'd get up and go to class, and I'd still be working on homework... Just be sure you're up for a whole lot of work if you want to go into EE!