Looking for feedback on a new 2 DOF hexapod design

Here is a prototype of a new 2 DOF hexapod design. It may replace the EH2 walker. Let me know what you think.

It’s a leaner design, and there is more ground clearance. I guess that’s a decent upgrade, but it’s not revolutionary. I guess I prefer SES-based builds.

Have you considered a round 12DOF hexapod?

I actually think the Mini is the coolest of the 12DOF designs. It would be cool if there was a aluminum Mini chassis available to match the rest of the SES parts.

Thanks for the good comments on the Mini-Hex. It’s cool, but this design will be a lot cheaper. :wink:

I was mostly interested in what people thought about the aesthetics of the overall look of the design. But the other comments are appreciated. This design is an SES design. Or in other words the leg kit will soon be part of the SES, and the chassis already is. There isn’t much to revolutionize in a 12 servo (2DOF) hexapod.

I think you mean “have you considered a round 2DOF hexapod?” and the answer is no. A round 2DOF hexapod will not work. You need an extra DOF in the legs to be able to do any walking. A round 2DOF hexapod is very good at turning in place, but it can’t really do anything else.

We are adding more aluminum chassis to the SES soon. It takes time to request quotes, aprove samples, shipping. We are working on it.

is the man chassis black anodized aluminum?

the design is very simple, clean, and robust looking. I like it! It’s a clever design.

Another feature I see is the internally mounted electronics which ads to the clean look, and offers protection as well. The two tone gives it a plesent appearance and makes it interesting to look at.

It’s not aluminum… yet! 8) The indirect drive will give it a nice payload capability. I haven’t tested it yet, just got it assembled. But as soon as the two movie bots are done it will be top priority.

I think the old one looks pretty good. The new one definitely looks leaner and more athletic… like maybe it’s ready to pounce on an unsuspecting mini-hexapod. :open_mouth:

I personally prefer monochromatic color schemes with a single build material (i.e. all silver aluminum, all yellow lexan), but I can see where some folks may prefer the look of mixed silver aluminum/black plastic. Lots of electronics stuff uses the silver/black scheme.

I guess I meant to say I prefer bracket-based builds.

Cool! I’m eventually going build a Mini for my son, and I’d like to do it in all silver aluminum. But daddy’s gonna get his black CH3-R first… 8)

I really like the look of the newer black design. You seem to be moving away from the good old “Lynxmotion Yellow” color scheme. The added ground clearance is great also.

8-Dale

It looks Lighter than the old one,
what the weight?

P.S I like the design =,its my kind of taste :wink:

I think the black inline design would look very cool with the CH3-R legs. :slight_smile:

8-Dale

I like the old one more. It looks more robust. More dangerous.

I prefere a 1 000 times the newer one, the two tones looks awesome and the desing is realy cooler and slimer than the first one who looks like a blob (the mecanisme for the leg). And it looks stronger and agile.

I LOVE IT! :smiley:

I realize that it’s really just a matter of perception, but…

The fact that the legs are built from a single plate just bugs me, from a mechanical point of view. Too many years of making sure that axles for rotating parts are supported from at least two points, spaced as widely as practical, keep my mind from accepting that this arrangement won’t introduce flex in the leg mechanisms due to torque loading. I understand that at the sizes and thicknesses involved, the single aluminum plates are more than rigid enough, and that the large round joints undoubtedly provide enough resistance to torque to keep everything together, but to my mind, it just looks wrong.

Perhaps more importantly, it triggers the same “flimsy” flag in my mind that I get when I see the single-beam construction of the CrustCrawler robots. Even though the assembly may actually be more rigid than its lexan counterpart, the single-beam design and single-point bearing surfaces just don’t look as robust as the slightly-bulkier yellow one.

Again, before anyone jumps all over me, I know that the aluminum version is likely more rigid and robust than the lexan version, and that this version produces a leaner, less chunky look - it just seems wrong to my eye. If I were looking to buy a hexapod kit, I might go with the base chassis, but I would feel better about the apparent increased rigidity and robustness of a standard SES leg, built with C brackets and their inherent wider bearing spacing, over these.

I’m not qualified to comment on engineering issues, but in terms of aesthetics, I agree with Seamus: single-plate looks flimsy. The CrustCrawler’s legs are particularly hideous. This design isn’t as bad as that, but it’s not as sexy as a thicker leg would be, nor as cool as the legs on the CH3-R.

Matt Denton’s V4b hexapod had single plate legs, but the shape made them way sexy: youtube.com/watch?v=5hbAMFAnui4

On the larger V5, Matt used a single plate tibia and dual plate femur that looks really innovative:
micromagicsystems.com/gallery/4516396945. The two robots standing next to each other are the V3 and V5.

Aesthetically I really prefer the new design – esp. with the color change. I do like the leg treatment with the indirect drive as well. Bigger payloads is a major plus. :slight_smile:

Exactly! :smiley:

We are slowly replacing all things yellow with black and aluminum. Long story, but getting custom colors in Polycarbonate is not an easy or fun process.

Ooh! I’ve got a “classic”, soon to be “collector’s edition” arm and hexapod! 8)

The new design is approximately 8-10 ounces lighter.

I appreciate the feedback. I also am not terribly excited about the look of the single pane leg part. It’s a 0.09" thick part which should be stronger than the same part made from 0.18" polycarbonate. (I have found that aluminum is stronger than an equivalent polycarbonate part that is double the thickness.) I’m not done experimenting with this yet. The goal is to make it all aluminum / injection molded, and look better too. The SES does need a good 2DOF mechanical advantage leg as well.

I Still think the Lynxmotion logo needs to chnage colors; from Yellow outline to aluminum! 8)