Need some Expert Advise on my Hexapod

Lynxmotion Legged Robots
1

Greetings to all fellow hobbyist;

           Hello, This forum help me alot. I am in the mid of building my first hexapod, untill i got some unsure insights on my design. I have several
   HS-425 servo and 11.1V Lipoly battery, that is why these parts became my option. I really don't know if the HS-425 can do the job. The 
   base assembly was machine on my home built CNC. 
            Anyway, I have several questions on this matter;
                        1) Can the HS-425 do the job?
                        2) Can someone give me an idea on the mathematical formula for the Basic Programming of the 3 gaits? Much better
                            if someone can give me a glimpse of their Basic or C++ code on Gaits ? I built a servo controller using 2 MCU for controlling the  
                            18 servo. I know that SSC-32 is the best for this job but I am still working for my funds to buy the SSC-32. I really hope i 
                            could buy one soon.  
                        3) Can someone give me an idea on circuit design on regulating the 11.1V Lipoly to 6V for the servo Supply? I read from this 
                            forum that using 7.2V Nicd will do the job, but too late for me, the 11.1V Lipoly is what i already bought.  
              I hope to hear some ideas from you, Thank you in advance. I really appreciate it.

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2

The HS-422 has 57 oz in of torque. The HS-485 has 83 oz in. In addition to the 45 percent torque increase, the 485 has a higher grade industrial plastic (carbonite) gears. The 485 is the weakest servo we have ever used in a 3DOF kit. Cool tibia design! 8)

3

I will second that. better to buy the 485’s or higher. im guessing the chassis (that looks very cool) is not aluminium? looks like a plastic material. this will help with the weight, not to mention the holes. :wink:

If you look at this list of hexapods you can see the servos used. these are the recommended minimum!

AH3-R (18 Servo Walker)
HS-645 Servos used for the robot.

BH3-R (18 Servo Walker)
HS-475 / HS-485 Servos used for the robot.

CH3-R (18 Servo Walker)
HS-475 / HS-485 Servos used for the robot.

T-Hex (18 Servo Walker)
HS-645 Servos used for the robot.

Phoenix (18 Servo Walker)
HS-645 Servos used for the robot.

BH3 (18 Servo Walker)
HS-475 / HS-485 Servos used for the robot.

Here is the list. it will also show you links to the code. but this will need the SSC32.
lynxmotion.com/c-3-hexapods.aspx

the tibia looks cool too, thanks for sharing. 8)

4

You could use a BEC to regulate the voltage down to an acceptable level. Overvoltage could FRY a servo.

Look at either the PowerPod download or Phoenix threads to see code. There’s also C code that’s been translated from the BasicAtom Code.

Mind the wires! ;>)

Tibia parts look cool!

Alan KM6VV

5

Hello, Thanks a lot to all, now i will start my hexapod. By the way, base is made from 4mm acrylic plastic. I post the final design soon. Also I have some Alien look hexapod design at progress, once I finish on the CNC stuff, i will post it too. Again thank you.