New project, please help : )

Discussions regarding building a walking robot at home. Most of the robots participating at Robo-One competitions are custom fabricated.
6 postsPage 1 of 1
6 postsPage 1 of 1

New project, please help : )

Post by GunTanK » Wed Jun 04, 2008 6:37 pm

Post by GunTanK
Wed Jun 04, 2008 6:37 pm

Hi, my name is Davide, i'm italian so sorry for my (very bad) english.
I want to start DIY humanoid and i need some info:

1) As a R/C fan i have a lot of servos, can i use standard servos for a humanoid biped?

2) Can i use the Robophilo logic/controller (it's a low cost one i think) with standard servos? If yes with what result? There are better low-cost logics?

3) I've planned to buil a strupture using "U" section alluminion rods, i tryed folding cartons for measuring servos and joints, is this a valid solution?

4) With these materials can i obtain a humanoid robot better than Robophilo? I viewed Robophilo walking and i dont like a lot how it walks


Thanks for help
Davide
Hi, my name is Davide, i'm italian so sorry for my (very bad) english.
I want to start DIY humanoid and i need some info:

1) As a R/C fan i have a lot of servos, can i use standard servos for a humanoid biped?

2) Can i use the Robophilo logic/controller (it's a low cost one i think) with standard servos? If yes with what result? There are better low-cost logics?

3) I've planned to buil a strupture using "U" section alluminion rods, i tryed folding cartons for measuring servos and joints, is this a valid solution?

4) With these materials can i obtain a humanoid robot better than Robophilo? I viewed Robophilo walking and i dont like a lot how it walks


Thanks for help
Davide
GunTanK offline
Newbie
Newbie
Posts: 2
Joined: Wed Jun 04, 2008 6:26 pm

Post by Wingzero » Wed Jun 04, 2008 10:20 pm

Post by Wingzero
Wed Jun 04, 2008 10:20 pm

What servos do you have (model #'s)?

Humanoids usually require servos that have a bit of torque and speed, depending on the size of the humanoid you plan to make of course.
What servos do you have (model #'s)?

Humanoids usually require servos that have a bit of torque and speed, depending on the size of the humanoid you plan to make of course.
Wingzero offline
Robot Builder
Robot Builder
Posts: 10
Joined: Tue May 27, 2008 3:02 am

Post by GunTanK » Wed Jun 04, 2008 11:04 pm

Post by GunTanK
Wed Jun 04, 2008 11:04 pm

Wingzero wrote:What servos do you have (model #'s)?

Humanoids usually require servos that have a bit of torque and speed, depending on the size of the humanoid you plan to make of course.


Actually i have a lot of old 6 Kg Bulk (Futaba) NON digital servos mounted on some maxy aircraft models, i plan to build a smaller as possible robot, in this way i hope that center of gravity and speed are good enought for a decent walk.

In the case my old servos can't fit on my project, what low-cost servos can i buy?

P.S.
Thanks 4 the reply ;P
Wingzero wrote:What servos do you have (model #'s)?

Humanoids usually require servos that have a bit of torque and speed, depending on the size of the humanoid you plan to make of course.


Actually i have a lot of old 6 Kg Bulk (Futaba) NON digital servos mounted on some maxy aircraft models, i plan to build a smaller as possible robot, in this way i hope that center of gravity and speed are good enought for a decent walk.

In the case my old servos can't fit on my project, what low-cost servos can i buy?

P.S.
Thanks 4 the reply ;P
GunTanK offline
Newbie
Newbie
Posts: 2
Joined: Wed Jun 04, 2008 6:26 pm

Post by DocVanThorp » Wed Jun 11, 2008 1:31 am

Post by DocVanThorp
Wed Jun 11, 2008 1:31 am

Look around the web. The cheapest servos might be around $7, but might not be very strong. Tomy's tiny robot has at least 16 servos, and retails for as low as $200, which suggests a manufacturing cost of less than $100, and a servo that costs about $6; these are small servos, and probably manufactured to Tomy's specification, and purchased in bulk, but they are an indicator of what must be available if you can find the right supplier.
Look around the web. The cheapest servos might be around $7, but might not be very strong. Tomy's tiny robot has at least 16 servos, and retails for as low as $200, which suggests a manufacturing cost of less than $100, and a servo that costs about $6; these are small servos, and probably manufactured to Tomy's specification, and purchased in bulk, but they are an indicator of what must be available if you can find the right supplier.
DocVanThorp offline
Robot Builder
Robot Builder
Posts: 9
Joined: Wed Jun 11, 2008 1:13 am

Post by cyberdead » Fri Jun 20, 2008 11:42 pm

Post by cyberdead
Fri Jun 20, 2008 11:42 pm

Hi.
May i have some advice.
I'm new in robotics too, but maybe there are somethings i can tell.
First of all if you want to do your own robot, try to make first, some scetches about your ideas (i mean how would it look like, and how the parts look like).
After that, you need to consider about the sizes. I saw that your servos are heavy, so you need to design a bigger robot.
Try to count the weight of the parts. The reason is, that if they are heavy, then the servos can't move them. With aluminium, U profiled parts it will not be a problem.
If you are known in robotics modelling, try to make a simple model with MATLAB, use inverse dinamycs, to count for needed servo torques.
After, these, you can do the design the excately parts, and can build the robot.

This is just a short description, and only one way to to design.

D.P.
Hi.
May i have some advice.
I'm new in robotics too, but maybe there are somethings i can tell.
First of all if you want to do your own robot, try to make first, some scetches about your ideas (i mean how would it look like, and how the parts look like).
After that, you need to consider about the sizes. I saw that your servos are heavy, so you need to design a bigger robot.
Try to count the weight of the parts. The reason is, that if they are heavy, then the servos can't move them. With aluminium, U profiled parts it will not be a problem.
If you are known in robotics modelling, try to make a simple model with MATLAB, use inverse dinamycs, to count for needed servo torques.
After, these, you can do the design the excately parts, and can build the robot.

This is just a short description, and only one way to to design.

D.P.
cyberdead offline
Robot Builder
Robot Builder
User avatar
Posts: 13
Joined: Fri Jun 20, 2008 11:27 pm
Location: Hungary

Post by cyberdead » Fri Jun 20, 2008 11:46 pm

Post by cyberdead
Fri Jun 20, 2008 11:46 pm

I almost forgot, about the locomotion design. I dont know the humanoid robot walking, but as help try to search, these keywords: "biped gait","robot gait", "robot locomotion".
I almost forgot, about the locomotion design. I dont know the humanoid robot walking, but as help try to search, these keywords: "biped gait","robot gait", "robot locomotion".
cyberdead offline
Robot Builder
Robot Builder
User avatar
Posts: 13
Joined: Fri Jun 20, 2008 11:27 pm
Location: Hungary


6 postsPage 1 of 1
6 postsPage 1 of 1
cron