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09-16-2009, 05:55 PM
| #1 |
| Pebble Pounder  Join Date: Mar 2008 Location: Amarillo
Posts: 181
|  High torque servo?
Ok, so, I've got a CS-170 servo now, and it's acting stupid, so I'm looking for a better one, what're some suggestions, I'm torn between a jr9100T and whatever the big bad airtronics one is...
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09-16-2009, 06:15 PM
| #2 |
| RCC Addict Join Date: Aug 2009 Location: Earth?
Posts: 1,698
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Here is a small list I put together. Prices may vary, and are subject to change without notice. And where you can find them is up to you. For full specs see manufacters web site. LOL. I use a 5990 I found online for 80 bucks. Hitec HS 7950TH (486oz) $149.99 JR S8711HV (480oz)7.4v $199.99 JR 9100HVT (480oz)7.4v $199.99 Futaba S9157 (425oz) $139.99 Airtronics 94780 (423oz) $109.99 Hitec 5990 (333oz)6v(416oz)7.4v $124.99 JR DS8711 (403oz) $139.99 Hitec HS 7954SH (333oz)6v(403oz)7.4v $104.99 JR Z9100t (370oz) $139.99 Futaba S9156 (340oz) $119.99 Hitec HS 7955TG (333oz) $119.95 hobbico cs-170 (333oz) $89.99 JR DS8611A (320oz) $124.99 |
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09-16-2009, 06:21 PM
| #3 | |
| Rock Stacker Join Date: Jun 2009 Location: Buford, Georgia
Posts: 64
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I own the Futaba and you need aluminum servo arms so the splines do not strip.  Harry | |
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09-16-2009, 09:25 PM
| #4 |
| Pebble Pounder Join Date: Mar 2008 Location: Amarillo
Posts: 181
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I've looked at most of em so far.....and am a bit torn on the options, most of them look about the same....and as far as the 7.4V ones, how do you check what radios are safe to run that kind of voltage through, and more importantly, what happens to the non-7.4V servos..... OH, and according to towerhobbies it says that futaba S9157 is NiCD only? why would that be? nimh and any of the lithium batteries too much amperage on demand or something? Last edited by dhyde79; 09-16-2009 at 09:32 PM. |
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09-16-2009, 10:00 PM
| #5 |
| Rock Crawler  Join Date: Dec 2008 Location: dallas
Posts: 968
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all of these high torque servos should be run through a bec, so the radio shouldnt be a concern. here is my opinion for what it is worth. I have ran the JR's and am done with them. while they are fast and strong the plastic a gear is a joke. the damb things self destruct. three of my friends have had the same issue. and all of these have been run .5 volts below their ratings. the Futabas have been having gear failure issues due to the top of the plastic case flexing. Ive even seen one slit down the middle within 1min of instalation. I havent ran an airtronics, so I dont know. the hitecs have never let me down, they will get week but the gears never fail. I have already ordered my new 7950's all three of them. I hope they are as good as there predicessors |
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09-16-2009, 10:06 PM
| #6 |
| Pebble Pounder Join Date: Mar 2008 Location: Amarillo
Posts: 181
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I'm running a CCBEC, but, you still have to run that through the rx unit, which you've got to worry about overpowering..... I've actually been leaning towards a hitec.....now, the challenge, finding someplace that has both a decent hitec servo, AND, a good aluminum horn for it..... |
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09-17-2009, 12:28 AM
| #7 | |
| Rock Crawler Join Date: Feb 2008 Location: UK
Posts: 818
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Wire everything as you normally would, without a BEC. Wire the BEC direct to your battery. Lift the red and black wires from the steering servo plug, leaving the yellow wire connected to the Rx. Connect the red and black wires to the CC BEC. | |
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09-17-2009, 04:31 AM
| #8 | |
| Just jump it!   Join Date: Aug 2008 Location: Cedar City, Utah
Posts: 1,947
| Quote:
Then take your + and - wires from your servo and hook them up to the + and - output of the bec. The only thing left from the servo will be the signal wire. Plug that into your esc. Just leave the bec signal wire unplugged. Its for programming only. The servo horn to get!!! http://rcpcrawlers.com/product.php?p...&cat=12&page=1 | |
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09-17-2009, 06:49 AM
| #9 |
| Pebble Pounder Join Date: Mar 2008 Location: Amarillo
Posts: 181
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ok, and when does it become overkill on torque.....I mean, it's on an AX10.....
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09-17-2009, 07:44 AM
| #10 | |
| I wanna be Dave Join Date: Feb 2009 Location: 20 miles southeeast of downtown Sacramento
Posts: 2,373
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09-17-2009, 10:14 PM
| #11 |
| Pebble Pounder Join Date: Mar 2008 Location: Amarillo
Posts: 181
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actually, I think my problem is binding.....I'm gonna tweak my servo mounts and see if I can shift the mount back about 1/4" and cure the issue.....hopefully, since nobody can get a servo here in time and nobody's got one more than about 150 oz-in in stock locally...
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09-18-2009, 05:26 PM
| #12 | |
| Rock Crawler Join Date: Mar 2008 Location: 920 Valley of the Fox
Posts: 768
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09-18-2009, 06:27 PM
| #13 |
| RCC Addict Join Date: Aug 2009 Location: Earth?
Posts: 1,698
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I think you can have to much usable torque. I had my servo turned up to 7.4V with 416 oz in torque and all it did was kill my battery real fast. I turned it down to 6V with 333oz in torque and didnt notice any differance in torque. But now my battey lasts longer.
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09-19-2009, 02:31 PM
| #14 |
| Rock Stacker Join Date: Jun 2009 Location: Portland
Posts: 89
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I still have some for sale.
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09-19-2009, 03:54 PM
| #15 |
| Pebble Pounder Join Date: Mar 2008 Location: Amarillo
Posts: 181
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which one(s) do you have? and what kind of horns do you have for them?
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09-19-2009, 08:10 PM
| #16 |
| RCC Addict Join Date: Jun 2009 Location: QLD, Australia
Posts: 1,512
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Steer clear of both the JR and the airtronics, they are both know to be POS. Go with the Futaba S9157. Runs on 6v so it is alot easier to set up your bec. Also runs nice and cool. TONS of power. Only high torque servo worth buying IMO. Kieren |
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09-19-2009, 10:01 PM
| #17 |
| Newbie Join Date: May 2009 Location: Fort Worth
Posts: 21
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whats the usual life expectancy for the JR servo? i've got one, the expensive one, and now i'm concerned.
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09-20-2009, 03:23 PM
| #18 |
| I wanna be Dave Join Date: Sep 2008 Location: four o six
Posts: 2,101
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Anything can happen at a blink of an eye...run it till it goes...you should be good for quite a while.
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09-20-2009, 07:05 PM
| #19 | |
| Rock Stacker Join Date: Jun 2009 Location: Buford, Georgia
Posts: 64
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Remember, you want speed plus torque....an AX10 may work fine with 100 oz. torque, just pick one with the fastest speed because it will feel the most natural to drive. Harry | |
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09-21-2009, 12:44 AM
| #20 | |
| Pebble Pounder Join Date: Mar 2008 Location: Amarillo
Posts: 181
| Quote:
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