Hi, I would like to do an investment and to buy some servos (10/20 units).
I don't have too much money to spend, so I'm looking for cheap servos with however enough torque to do some interesting robots (humanoid, arm, hexapod, etc).
Initially I found MG995/MG996R servos, then I found rds3115 robot servo.
The features of the rds3115 are:
Weight：60g
Size：40.0*20.0*40.5mm
Speed：0.16sec/60°@4.8V 0.14sec/60°@6V
Stall Torque：13.5 kg/cm @4.8V 15kg/cm @6V
Operating Voltage：4.8-7.2Volts
Operating Current：150mA
Futaba,JR,SANWA,Hitec compatible.
price about US $7 (with brackets)
They're digital and they seems to be better than the mg series and to have a good quality/price ratio, what do you think?
Do you have some expirience with them?
Do you know some other servos with a similar quality/price ratio?
And I'm going to buy a 32 channel servo board (http://www.bajdi.com/torobot-32-channel-servo-controller/) for them what do you think about it?
rds3115 are there from $29 + shipping and more… where did you find them at $7? Are them for selling or is it an auction?
As you may know an auction online finish usually at a price close to the usual price you find online. Or maybe the seller is not good enough. It’s better to double check than to risk a certain amount of money.
From the technical aspects of the servos, I think they are good enough for the robotic projects you plan…
About the board, I’m not sure with which controller board you want to handle it, so maybe there is a more suitable/flexible solution. I just oppened some days ago a similar question in LMR’s forum and I got some useful tips. Even I created a Form to get new tips about boards so everybody will have more information and better handled:
You are right, there are some great offers in Aliexpress, however I checked before purchase that online shop and it has not a very good reputation if you Google it too
Hi to all , I’m new in this site! I saw your discussion about the servo motors rds3115 and its price… Probably I’ll buy it on aliexpress site where is very convenient… but I don’t find a site where I can see the datasheet of this servo.
Can someone confirm that it can powered witn 5V?
Is this servo a digital servo? If yes… exists a specific protocol to setup the position or can I control it with a standard PWM.
"I’m looking for cheap servos with however enough torque to do some interesting robots (humanoid, arm, hexapod, etc)."
First of all, is to do some physics calculation to know what force do you need for move the arm, hand, robot … after you can know waht servo can do the job for you
