I originally wanted to build a small quadrapod using HS-81 or HS-55 servos, but I thought I would go with a more tried and tested design. I definitely want a 3DOF one, but I’m not sure which one to go with. I really like the looks of the SES one (the brushed metal look strikes my fancy) as opposed to the lexan one, but from what I calculated, its more expensive.
2x 3DOF Leg kits - $87.90 each
Lexan frame - $19.95
12 Servos - $215.88
(I may be able to get the servos at discount at my hobby store…I’ll check the prices tonight)
SES Total: $411.63
The Quadrapod 3 only costs $351.95
Does that extra $60 come from the fact that I am getting aluminum parts as opposed to lexan ones?
And, I still need the following:
SSC-32 - $39.95
Visual Sequencer - $39.95
Battery - $? (I’m going to buy a Lipo at the hobby store where I work)
So, my question is: Which do you think is a better choice?
Also, how hard are quarapod’s gaits to program? I read somewhere there are pre-programmed ones in the visual sequencer. Is this true?
This is my first legged robot so I need some help…
Personal preference:
I would go with the aluminum ones, as those parts would give you the flexibility to make a hexapod, biped, or really anything else you want to make. The SES brackets seem quite diversifiable.
Thats what I was thinking…and anyways, with the amount of money I will be spending, $60 isn’t a lot for that upgrade.
Also, I found my discount at my store brings 12 HS-475’s to $166…totally worth it. And it makes up for most of the extra cost associated with the SES version.
Oh, and is there any significant difference between the regular ‘square’ quadrapod and the symmetrical (round body) one?
You can consider the Square ones quite polarized. There’s definitely a head/tail side and right and left side when looking at it from top view.
The round ones makes it quite interesting since there is no definitive head/tail and right and left. Sure, you can define it as such, but nothing mechanical would dictate which sides should be head/tail or left/right.
In the end, it’s all about preference and aesthetics. Some like in-line version, some likes round ones…
I personally use a “round” hexapod (H3 series chassis), I consider it beautiful but it’s a little unsettling at times mentally since there is really no “front” or “back” or “Left side” “Right side”!
I think if you’re planning to make a dog/cat like bot later, definitely go with the in-line/straight variants. Of course, if you choose SES, there’s usually more then one solution to make it in-line/straight so take your time and have fun with the chassis design/configuration!
No, we have done some SEQ projects like J5, Biped Pete, and the BRAT, but we do not have anything for quadrupeds.
I’m trying to follow along, have you decided to make a hexapod instead of a quadruped?
Square bodies assume the legs on both sides are centered on the horizontal axis perpendicular to a front to rear line of the chassis, but round would assume each horizontal axis of the legs are 90° from each other. So “round” ones rotate in place faster then “square” ones. This applies to quadrupeds and hexapods.
Nope, I’m still going for the quadrapod…mostly for cost reasons (my job pays for gas and insurance, not much else). I was simply saying my opinion on hexapod design as tom_chang79 did above. I admit my post was a bit confusing…
But I would absolutely love to have a hexapod…maybe in the future I will; all I need is a chassis and two more legs…thats why I’m going with the SES approach.
I think for my sake its actually better there are no gaits available for the quadrapod…I like the challenge of making my own. I’ve seen enough examples in videos lately that I think I can do it with a little help here and there.
Anyways, the visual sequencer is easy to use (relatively speaking) for this type of thing, correct?
