Ask choosing servo

Help & Support Robot Parts
1

hello my friends, my name is phadank im new here…

im confuse about 2 servo for my project Hexapod…

Ihave 2 option servo (for my low budget) :blush:

1. HS-311 Standard Servo Motor (Nylon Gear)
Specification
Torque 4.8/6.0V (kg.cm) : 3.0 / 3.7 or (42/51oz.in)
Speed 4.8/6.0V (sec/60°) : 0.19 / 0.15
Size : 40x20x37mm / (1.57x0.78x1.43in)
Weight : 43.0g / 1.5oz

2. Tower Pro SG-5010
Description:
Operating Speed:
(4.8V no load): 0.20sec/60 degrees
(6.0V no load): 0.16sec/60 degrees

Stall Torque:
(4.8V):(5.2 kg/cm)/ (6.0V):(6.5 kg/cm)

Temperature Range: -20 to +60 Degree C
Dead Band Width: 4ms
Operating Voltage:4.8-6.0 Volts

for coxa im using HB-225bb

and what better servo for tibia and femur?
help me please… :neutral_face:

many thanks for the answear
sorry for my bad english, coz english not my primary language :slight_smile:

2

no one can help me? :cry:

3

Both of the servos are very similar. Both of them are not very powerful. What sort of hexapod are you wanting to build? 12 servo, 18 servo etc…

4

finally some one can help me :smiley: thanks dude

yeah I know thats not powerfull servo, :cry:
If you think, which one is better and you will choose which one? :slight_smile:

sure i build hexapod with 18 servo, 6 servo I use HB-225bb and 12 servo again I will use from one of the options above…

sorry my bad english im using google translate :frowning:

thanks robot dude

5

Although I believe there was one instance of a fellow using 422 servos to build a hexapod, I wouldn’t recommend either of your servo choices.

At a minimum, choose a '485 (83 oz.-in), or preferably a '645 (133 oz/in).

We’ve had bad reports about Tower Pro servos.

Alan KM6VV

6

You might consider getting only 3 servos and build a test leg to see how well they operate before ordering a lot of servos.

7

huh I really confuse, I dont have extra cost, but my project must be finish, :cry:
my friends choice tower pro, and my other friends choice hs-311
and how about u guys… :frowning:

8

hi and welcome, As Alan pointed out the 485’s and the 645’s are a very common option here. both these servos work well in an 18 servo hexapod “depending on the total weight of cause”.

if i was looking to build a hexapod id look at what others have done first. this will give you a better idea of what will work and what just wont.

The coxa will save you money and a lower torque servo can be used here but again it will depend on how much force you will be putting on it regarding walking and weight combined!

Zoomkat has given a good starting point about doing a test run by building one leg and testing it. that’s also a common way to do things if you are not familiar with “engineering” the design.

At a minimum, choose a '485 with (83 oz.-in) for the Femur and Tibia and no less than (67 oz.-in)for the coxas

9

Also depends on the battery load (weight). Bigger battery, more current, longer run. On the cheap, run a cable to the batteries! But then what do you do with all the cheap servos (which will probably break) later when you upgrade?

Alan KM6VV