Author Topic: Speedier Servo  (Read 2202 times)

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Offline KambeiXTopic starter

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Speedier Servo
« on: June 30, 2007, 01:11:32 PM »
Hi! I'm new in the forums and so far it looks great.

I'm building a robot using parallax (futaba) continuous rotation servos but I want to add a litlle more speed to the design without losing too much torque.

The robot should be able to cross small pools of water (10cm~15cm deep) so I thought of waterproofing the servos or using gears, but I'm not sure what would be the best option. Also, the robot can't be too high (no more than 30cm) so I can't use big wheels.

If someone could help me a little with alternatives, examples or ideas I will be very glad.

Thanks.

Offline Steve Joblin

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Re: Speedier Servo
« Reply #1 on: June 30, 2007, 01:36:27 PM »
I've gotten more speed by simply pumping it with more voltage... They say they are rated for 6V max, but I've given them 9v (6 AA batteries) with no probs yet.  This site has some pretty good tutorials for waterproofing, so have a look.

Offline KambeiXTopic starter

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Re: Speedier Servo
« Reply #2 on: June 30, 2007, 02:35:05 PM »
Indeed, I just tried putting 12v to a servo and it got faster, but also pretty hot.

I will do a continuous 10 minute run on 12v and see if it survives.

____


EDIT: it endured 2 minutes xD

it still works but now it's slower.

I think a 7.2v Lithium battery will do fine, but the speed gain isn't that much. From 60rpm@6V to [email protected]  approx...

« Last Edit: June 30, 2007, 02:48:24 PM by KambeiX »

Offline Steve Joblin

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Re: Speedier Servo
« Reply #3 on: June 30, 2007, 03:49:59 PM »
if 12 volts makes it too hot, and 7.2 doesn't get you what you want, try 9 volts... I think you will find it to be the perfect voltage to compliment your modified servos!

Offline sotu

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Re: Speedier Servo
« Reply #4 on: July 01, 2007, 08:01:17 AM »
You mean the robot will drive on the bottom of the pool of water right?
And if you search the forum for waterproofing a servo you will find a topic admin put up.
If your servo get hot its no point in running it uintil it stops, if it gets hot stop at once, trust me i know all about it, i ran a RC microcontroller at to much voltage and it got HOT and started to smoke.
Yeh u could try 9 V or just buy a better servo..!

(Check out unitedhobbies.com, i have ordered some servos from there and they have got good respons)
How to build a biped bot:

Offline Admin

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Re: Speedier Servo
« Reply #5 on: July 17, 2007, 07:10:30 PM »
maybe heatsink your servo?

Offline KambeiXTopic starter

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Re: Speedier Servo
« Reply #6 on: July 17, 2007, 07:15:26 PM »
12V was just an experiment, I think 7.2V is ok for a 6v servo.


 


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