servo torque requirements
10-16-2005, 02:52 AM
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servo torque requirements
What is the best method for determining the amount of torque I will need to steer my vehicle? I figure the best measurement would be taken under load and motionless, but am not sure how to test it.
10-16-2005, 03:03 AM
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RE: servo torque requirements
well what vechicle are you talking about, perhaps some ppl here have, or have had the same car, and can tell you what u need.
10-16-2005, 04:07 AM
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RE: servo torque requirements
you get two JR DS8611 servos, put them together and you get 520 oz-in torque and speed of 0.18 i think
and you can hold the front wheels so no way that they can turn....and watch the whoe car move from right to left.
[:-][:-]
WHAT??? don't tell me bed time stories because you cannot beat that^^ [:@]
of course it iwll cost you about $250 with tax [&o]
and you can hold the front wheels so no way that they can turn....and watch the whoe car move from right to left.
[:-][:-]
WHAT??? don't tell me bed time stories because you cannot beat that^^ [:@]
of course it iwll cost you about $250 with tax [&o]
10-16-2005, 11:26 AM
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RE: servo torque requirements
Hmm, should have been more specific, this is for my truck. 1/4 scale, 60lb 4wd. I'm looking at the Tone 050, but figured if I could save a few bucks by getting something smaller that would be great. Guess I'll have to wait and see, but it's looking like thats the one I need.
10-16-2005, 12:13 PM
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RE: servo torque requirements
you prob need somthing like a Tonegawa servo for 1/4 scale truck - 50kg+ torque but £170 ea or hitec do titanium geared servo 330oz of torque (not sure whats that in kg!!) for around £60ea
http://www.tornadoracing.biz/tonegawa.htm
http://cgi.ebay.co.uk/Hitec-HSC-5955...QQcmdZViewItem
http://www.tornadoracing.biz/tonegawa.htm
http://cgi.ebay.co.uk/Hitec-HSC-5955...QQcmdZViewItem
10-16-2005, 12:32 PM
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RE: servo torque requirements
ORIGINAL: Soloratov
Hmm, should have been more specific, this is for my truck. 1/4 scale, 60lb 4wd. I'm looking at the Tone 050, but figured if I could save a few bucks by getting something smaller that would be great. Guess I'll have to wait and see, but it's looking like thats the one I need.
Hmm, should have been more specific, this is for my truck. 1/4 scale, 60lb 4wd. I'm looking at the Tone 050, but figured if I could save a few bucks by getting something smaller that would be great. Guess I'll have to wait and see, but it's looking like thats the one I need.
10-16-2005, 01:26 PM
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RE: servo torque requirements
I'm using 2 Hobbico CS-80's from TH. They have 334oz-in and a 60° speed of 0.14sec (@6v). They are not the best (by far), but fit my price range ($30ea). They are mounted with one driving each tire and a "drag link" between them. I'm hoping that they can help each other when all of the weight is on one front. I used light aluminum threaded rod and plastic rod ends in hopes of breaking these before a servo. They can draw 1200mAh each, and sould not be run through a BEC reciever. I'm using lead/acid and have 9Ah of 6v on-board. MIKE
10-16-2005, 03:19 PM
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RE: servo torque requirements
Thanks for the link RCmad, been looking around and it seems I can only get one of the Tone servos from overseas. Kind of a pain since I am in the US, but hey, if I have to do it that way i will.
Mike.....think i understand your post. Do you mean you have the servos hooked up independent of the power running thru the reciever? If so, thats how the Tone servos are supposed to be hooked up and would be the way i am doing it since I plan to have a 12v motorcycle battery in teh truck to run the electric start, lights and so forth. Need to figure out how to dfrop the voltage to a safe level for use with the radio equipment, but shouldn't be too hard.
Mike.....think i understand your post. Do you mean you have the servos hooked up independent of the power running thru the reciever? If so, thats how the Tone servos are supposed to be hooked up and would be the way i am doing it since I plan to have a 12v motorcycle battery in teh truck to run the electric start, lights and so forth. Need to figure out how to dfrop the voltage to a safe level for use with the radio equipment, but shouldn't be too hard.
10-16-2005, 04:48 PM
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RE: servo torque requirements
Yes. Each servo came with a Y cable. You hook a seperate lead from this to the battery. Look in DigiKey for DC-DC converters. I have a 24v transmission and will also have a pair of 12's wired series for it. I thought about converting to 6v from them, but it was easier to just chuck in more batteries. I can get 2-12v feeds from them though (camera, brake & headlight are 12v). Good luck, MIKE
10-16-2005, 05:56 PM
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RE: servo torque requirements
Hitec have gear transmissions for their servo's which multiply the torque, you give up speed of course but they are available from www.servocity.com
