Simple 18 DOF robonova

Hitec robotics including ROBONOVA humanoid, HSR-8498HB servos, MR C-3024 Controllers and RoboBasic
18 postsPage 1 of 21, 2
18 postsPage 1 of 21, 2

Simple 18 DOF robonova

Post by Voelker » Fri Jan 18, 2008 6:48 pm

Post by Voelker
Fri Jan 18, 2008 6:48 pm

Hi all,

I have just added hips rotation capabilities to my robot. I have just added tow HSR5498SG between the tow hips brackets by drilling four holes and directly fixing the servos on the bracket. It seems to work fine, the robot is still well balanced but can't perform all the basic move. Walking is not working fine as the gap between legs is larger but i'll try to improve it by adding hips movement.Image.
Hi all,

I have just added hips rotation capabilities to my robot. I have just added tow HSR5498SG between the tow hips brackets by drilling four holes and directly fixing the servos on the bracket. It seems to work fine, the robot is still well balanced but can't perform all the basic move. Walking is not working fine as the gap between legs is larger but i'll try to improve it by adding hips movement.Image.
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Post by NovaOne » Fri Jan 18, 2008 8:50 pm

Post by NovaOne
Fri Jan 18, 2008 8:50 pm

Excellent ! :D :D

I like what you are doing, I'm a few Sunday afternoons away (if all goes well :? ) from getting hip rotation on my RN.

How are you finding the HSR-5498SG's, are they up to the job?. I have two ready to fit but, I was wondering if they would be better utilized swapping them with with 8498's from the legs?

Is there anyway you could bring the legs closer together, having to reprogram stock moves sounds like a real bind :(

Could you post a more close up picture and maybe a video, please.
Excellent ! :D :D

I like what you are doing, I'm a few Sunday afternoons away (if all goes well :? ) from getting hip rotation on my RN.

How are you finding the HSR-5498SG's, are they up to the job?. I have two ready to fit but, I was wondering if they would be better utilized swapping them with with 8498's from the legs?

Is there anyway you could bring the legs closer together, having to reprogram stock moves sounds like a real bind :(

Could you post a more close up picture and maybe a video, please.
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Post by JavaRN » Fri Jan 18, 2008 9:38 pm

Post by JavaRN
Fri Jan 18, 2008 9:38 pm

Excellent! I am really impressed. It looks nice and simple. Yes I agree with NovaOne, can you please post more close up photos so that newbies like me can see and may be tr it out ourselves.
Excellent! I am really impressed. It looks nice and simple. Yes I agree with NovaOne, can you please post more close up photos so that newbies like me can see and may be tr it out ourselves.
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Post by Voelker » Sat Jan 19, 2008 6:05 pm

Post by Voelker
Sat Jan 19, 2008 6:05 pm

The HSR-5498SG seems to be perfect for hips rotation but i think that they also would be perfect replacing the other legs servo as they are more accurate. Today i have worked on the servo setting, and i modified the hardware setting by modifying the bracket position on the servo horn. My robonova is now more stable but the basic servo seems to be a little weak to handle the extras weight and height. I am soon gonna replace the stock battery with lipo to try to decrease the weight, and when i ll have a little more money, i'll replace the basic ankle and knee servo with HSR-5498SG.

Image
Image
The HSR-5498SG seems to be perfect for hips rotation but i think that they also would be perfect replacing the other legs servo as they are more accurate. Today i have worked on the servo setting, and i modified the hardware setting by modifying the bracket position on the servo horn. My robonova is now more stable but the basic servo seems to be a little weak to handle the extras weight and height. I am soon gonna replace the stock battery with lipo to try to decrease the weight, and when i ll have a little more money, i'll replace the basic ankle and knee servo with HSR-5498SG.

Image
Image
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Post by NovaOne » Sat Jan 19, 2008 7:51 pm

Post by NovaOne
Sat Jan 19, 2008 7:51 pm

Thanks for the extra pics 8) you say:
I am soon gonna replace the stock battery with lipo


What regulator do you intend to use?

PS
Keep up the good work :D
Thanks for the extra pics 8) you say:
I am soon gonna replace the stock battery with lipo


What regulator do you intend to use?

PS
Keep up the good work :D
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Post by Voelker » Wed Jan 30, 2008 4:50 pm

Post by Voelker
Wed Jan 30, 2008 4:50 pm

I have finally replaced the stock battery with a lipo + regulator. The regulator i've found can provide up to 8 amps, and you can connect tow batteries to it. This regulator is a bit big as i has a big blue heatsink, but it can fit on robot chest. I also added a voltage monito on the chest to watch the battery level.

the regulator:
http://www.verticalhobby.com/kauppa/product_info.php?cPath=21&products_id=415&language=en

Image
Image
I have finally replaced the stock battery with a lipo + regulator. The regulator i've found can provide up to 8 amps, and you can connect tow batteries to it. This regulator is a bit big as i has a big blue heatsink, but it can fit on robot chest. I also added a voltage monito on the chest to watch the battery level.

the regulator:
http://www.verticalhobby.com/kauppa/product_info.php?cPath=21&products_id=415&language=en

Image
Image
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Post by NVR2FST » Wed Jan 30, 2008 5:03 pm

Post by NVR2FST
Wed Jan 30, 2008 5:03 pm

"I also added a voltage monito on the chest to watch the battery level." :wink:
"I also added a voltage monito on the chest to watch the battery level." :wink:
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Post by MYKL » Thu Feb 07, 2008 5:35 pm

Post by MYKL
Thu Feb 07, 2008 5:35 pm

This is great!

Are you able to shoot a short Video of your creation abulating about with its new DOF?

Any problems with your LiPo/Regulator so far?

Are you able to use the low current blink with the 'bot too?
This is great!

Are you able to shoot a short Video of your creation abulating about with its new DOF?

Any problems with your LiPo/Regulator so far?

Are you able to use the low current blink with the 'bot too?
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Post by Voelker » Sun Feb 10, 2008 1:46 pm

Post by Voelker
Sun Feb 10, 2008 1:46 pm

The regulator is doing very well, in fact it is far better than the stock battery as it maintain a constant 6v power input, so servos as the same torque and same speed all along the run. I have craeted my first 18DOF motion today. I had many difficulties creating this move as it implies balance change.
watch the video below:

http://robosavvy.com/Builders/Voelker/turn-around.avi
The regulator is doing very well, in fact it is far better than the stock battery as it maintain a constant 6v power input, so servos as the same torque and same speed all along the run. I have craeted my first 18DOF motion today. I had many difficulties creating this move as it implies balance change.
watch the video below:

http://robosavvy.com/Builders/Voelker/turn-around.avi
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Post by Humanoido » Wed Feb 13, 2008 10:04 am

Post by Humanoido
Wed Feb 13, 2008 10:04 am

Very good job! The video clearly shows new motion capabilities.

humanoido
Very good job! The video clearly shows new motion capabilities.

humanoido
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Post by tum » Tue Mar 18, 2008 6:43 pm

Post by tum
Tue Mar 18, 2008 6:43 pm

Hi,

What's the difference between the HSR5498SG servo and the stock robonova servo?
Hi,

What's the difference between the HSR5498SG servo and the stock robonova servo?
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Post by Voelker » Tue Mar 18, 2008 7:36 pm

Post by Voelker
Tue Mar 18, 2008 7:36 pm

The main difference is the torque, but this servo also has the advantage to have metal gears. This servo mounting wouldn't have been possible without this servo as the stock servo has a plastic horn which would have been too weak.
The main difference is the torque, but this servo also has the advantage to have metal gears. This servo mounting wouldn't have been possible without this servo as the stock servo has a plastic horn which would have been too weak.
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Post by tum » Wed Apr 09, 2008 5:25 pm

Post by tum
Wed Apr 09, 2008 5:25 pm

Voelker wrote:I have finally replaced the stock battery with a lipo + regulator. The regulator i've found can provide up to 8 amps, and you can connect tow batteries to it. This regulator is a bit big as i has a big blue heatsink, but it can fit on robot chest. I also added a voltage monito on the chest to watch the battery level.

the regulator:
http://www.verticalhobby.com/kauppa/product_info.php?cPath=21&products_id=415&language=en

Image
Image


Where did you get the meter from? I've been looking for a small prebuilt tidy looking one like your one :-)
Voelker wrote:I have finally replaced the stock battery with a lipo + regulator. The regulator i've found can provide up to 8 amps, and you can connect tow batteries to it. This regulator is a bit big as i has a big blue heatsink, but it can fit on robot chest. I also added a voltage monito on the chest to watch the battery level.

the regulator:
http://www.verticalhobby.com/kauppa/product_info.php?cPath=21&products_id=415&language=en

Image
Image


Where did you get the meter from? I've been looking for a small prebuilt tidy looking one like your one :-)
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Post by tum » Thu May 15, 2008 11:47 pm

Post by tum
Thu May 15, 2008 11:47 pm

Voelker wrote:I have finally replaced the stock battery with a lipo + regulator. The regulator i've found can provide up to 8 amps, and you can connect tow batteries to it. This regulator is a bit big as i has a big blue heatsink, but it can fit on robot chest. I also added a voltage monito on the chest to watch the battery level.

the regulator:
http://www.verticalhobby.com/kauppa/product_info.php?cPath=21&products_id=415&language=en

Image
Image


I finally found the indicator you used. I've posted instructions on my blog on how to change the indicator from a dot-dot indicator into a full bar indicator.

http://www.abstractpath.com/weblog/2008 ... -show.html


BTW, how do you find the regulator? Is 8A enough to power the robot through high current moves like getting up or walking?

Thanks :-)
Voelker wrote:I have finally replaced the stock battery with a lipo + regulator. The regulator i've found can provide up to 8 amps, and you can connect tow batteries to it. This regulator is a bit big as i has a big blue heatsink, but it can fit on robot chest. I also added a voltage monito on the chest to watch the battery level.

the regulator:
http://www.verticalhobby.com/kauppa/product_info.php?cPath=21&products_id=415&language=en

Image
Image


I finally found the indicator you used. I've posted instructions on my blog on how to change the indicator from a dot-dot indicator into a full bar indicator.

http://www.abstractpath.com/weblog/2008 ... -show.html


BTW, how do you find the regulator? Is 8A enough to power the robot through high current moves like getting up or walking?

Thanks :-)
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Post by Voelker » Sat May 17, 2008 2:02 pm

Post by Voelker
Sat May 17, 2008 2:02 pm

No problem with the regulator sor far. The robot is more stable as there is no voltage drop when there is Amp peaks. The voltage is also more stable along time not like with the stock battery. The regulator is little too heavy (big heatsink) but it doesn' affect the performance has the battery is lighter, just someminor changes to the balance.
No problem with the regulator sor far. The robot is more stable as there is no voltage drop when there is Amp peaks. The voltage is also more stable along time not like with the stock battery. The regulator is little too heavy (big heatsink) but it doesn' affect the performance has the battery is lighter, just someminor changes to the balance.
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