RoboSavvy Forum

Biped development platform

2008-10-20T16:21:25+01:00

Great, I appreciate both responses.
Thanks,
Rod

Statistics: Posted by Rodman — Mon Oct 20, 2008 4:21 pm

Re: Biped development platform

2008-10-20T15:13:34+01:00

The specs and drawings on this page http://www.kondo-robot.com/guide/data.html should answer your dimensional questions. You'll also find the appropriate DXF files.

Yes, the RCB3 can handle 12, or more of the servos. It's the controller of choice for most of the ROBO-ONE competitors, and they load it up with from 17 to 23 servos, usually 4013's or 4014's, but sometimes 2350's - especially for the robot soccer players.

Enjoy.

Rodman wrote:
Hi guys,

I'm pretty new to this as I just discovered this hobby a couple weeks ago, I've been studying up on it ever since. I'm a mechanical engineer and have developed several fully automated machines for industry all under PC control. I have some C/C++ programming background, I have several co-workers who are also interested in doing a project. I'm pretty sure I want to build a biped (just so much cooler than a roll-around platform) with the plan to gradually evolve it into an autonomous platform.

I have an RCB3-HV controller (not the J version) and a single KRS-4024HV servo that I have played with it a little using the H2H software. Other than a bunch of RC truck stuff that's my starting point.

My initial plan is as follows:
Controller: RCB3 w/ H2H
Frame: Lynxmotion Scout - this seems flexible
Servo: KRS-2350HV red version (12X) (high torque 29.5 kg/cm, fine position resolution, smooth)
Gyros: KRG-2 or KRG-3

Questions:
Does anyone know where I can find a drawing of the KRS-2350HV servo? I found the overall dimensions but not a complete drawing i.e. output shaft location, flange positions. I want to confirm the physical fit with the lynxmotion brackets.

The KRS-2350HV has a lot of torque not sure of the current draw, can the RCB3 handle 12 of these servos? I may buy a pack of 10 and then use two lower torque for maybe the ankles???

I want a strong smooth platform for future development and payload capacity. Please let me know your thoughts.

Rod

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Statistics: Posted by tempusmaster — Mon Oct 20, 2008 3:13 pm

Biped development platform

2008-10-18T17:43:27+01:00

I do not know if the KRS4024HV servo horn is the same as the one on a KRS2350HV. The KRS2350HV is about the same size as HS-5645 and HSR-5990TG, but servo horn on KRS2350HV is smaller them the Hitec servo horns.

Statistics: Posted by RKM83 — Sat Oct 18, 2008 5:43 pm

Biped development platform

2008-10-18T17:24:08+01:00

Do you know if the KRS4024HV servo horn is the same on the KRS-2350HV?

Lynxmotion posts solid models of their brackets which I have imported into SolidWorks although I need to verify their accuracy. If I had a drawing or better dimensions of the KRS-2350HV then I verify the fit via the model.

Do you think I could simply machine either the bracket(s) or horn to fit? Drilling holes or minor modifications would not be a problem but if the servo is too tall or otherwise would not fit then that's another story.

Statistics: Posted by Rodman — Sat Oct 18, 2008 5:24 pm

Biped development platform

2008-10-18T17:05:30+01:00

Hey Rod-

RCB3 broad shouldn't have a problem w/12 KRS-2350HV, but the KRS-2350 horns might not fit lynxmotion brackets.

Statistics: Posted by RKM83 — Sat Oct 18, 2008 5:05 pm

Biped development platform

2008-10-18T16:55:36+01:00

Hi guys,

I'm pretty new to this as I just discovered this hobby a couple weeks ago, I've been studying up on it ever since. I'm a mechanical engineer and have developed several fully automated machines for industry all under PC control. I have some C/C++ programming background, I have several co-workers who are also interested in doing a project. I'm pretty sure I want to build a biped (just so much cooler than a roll-around platform) with the plan to gradually evolve it into an autonomous platform.

I have an RCB3-HV controller (not the J version) and a single KRS-4024HV servo that I have played with it a little using the H2H software. Other than a bunch of RC truck stuff that's my starting point.

My initial plan is as follows:
Controller: RCB3 w/ H2H
Frame: Lynxmotion Scout - this seems flexible
Servo: KRS-2350HV red version (12X) (high torque 29.5 kg/cm, fine position resolution, smooth)
Gyros: KRG-2 or KRG-3

Questions:
Does anyone know where I can find a drawing of the KRS-2350HV servo? I found the overall dimensions but not a complete drawing i.e. output shaft location, flange positions. I want to confirm the physical fit with the lynxmotion brackets.

The KRS-2350HV has a lot of torque not sure of the current draw, can the RCB3 handle 12 of these servos? I may buy a pack of 10 and then use two lower torque for maybe the ankles???

I want a strong smooth platform for future development and payload capacity. Please let me know your thoughts.

Rod

Statistics: Posted by Rodman — Sat Oct 18, 2008 4:55 pm