Quadropad Headache

I’m not using the reverse knee design for my bot, so this leg design is out, but I’m taking note of the gait. Looks interesting

Cool! This would help alot! Thanks

I might just remove 1 servo and stick to a 2DOF leg, then I’ll lighten up the bot and probably increase my run time

Funny, I don’t see this leg in the website… Is this kit available? or is this an old kit?

Looks quite siminlar to this kit: http://www.lynxmotion.com/images/temp/2dofhex1.jpg

but the servo mounting look weird :question: how is the 2nd servo linked to the tibia?

Finally exams are over… am continuing on my quad.

Made some major changes to the legs: redesign the legs and added push buttons for ground sensing :laughing:

Here are some pics I took while in the testing stage:
http://i31.photobucket.com/albums/c391/ZeRoC00l/FYP/DSC01458_1.jpghttp://i31.photobucket.com/albums/c391/ZeRoC00l/FYP/DSC01459_1.jpg
Am thinking of getting a SC-32 to control the gait, as my PIC18F252 is giving me a hell of a time.

This is my quad as of NOW :wink: Not much to look at but i’m improving as we speak.
http://i31.photobucket.com/albums/c391/ZeRoC00l/FYP/DSC01462_1.jpg

Wonder if anyone can shed some light on stopping the gait motion when a foot sensor senses or obstacle or doesn’t sense a ground ahead?
So the robot stops the foot at that specific height, and continues with the gait :question: Or backs away from the edge :question:

I am now polling for the switch every XX counts down, it not only takes a considerable amount of time but it’s not very accurate. (Toppled a few times)

Any kind soul can offer their advice/SCC-32 codes and I’ll convert to C to test on my quad.

Here’s an example I found :open_mouth: :
youtube.com/watch?v=Pdj6R0UTB8Y
A LM HEX with FSR pads, and it’s partially what I have in mind, and combined with the vidz below.
i31.photobucket.com/albums/c391/ZeRoC00l/FYP/th_foot_sense.jpg(found it somewhere but forgotten, it’s not mine. Credit goes to the owner)

Sorry I missed this post…

The yellow one on the right is the EH2-KT. The one on the left is a prototype I am working on to replace the EH2-KT. Here is more information…

Pasted from another thread.
I have been experimenting with the tibia on this prototype 2DOF hexapod. There is a spring that allows the tip if the tibia to float while the hex is walking. The middle leg takes the brunt of the floating when the hex is walking forward, but the fore and aft tibias do more floating when the hex is turning in place.

The tibia needs to be made from aluminum, and I need to decide if the femur will be two plates or just the one. Trying to keep the costs down.

The chassis is now aluminum…

Here is an image of the bot.

Here is a closeup of the leg.

Here is the chassis with the optional side panels.

The side pannels make a big difference in the looks. It looks 10x better in my opinion. 8)

Very interesting design, I like the servo not taking all the weight.

vidz is up :smiley:

The speed has been altered: Speed X 2

i31.photobucket.com/albums/c391/ZeRoC00l/FYP/th_Test1.jpg

http://i31.photobucket.com/albums/c391/ZeRoC00l/FYP/DSC01462_1.jpg

Wow! Looking great! The gait is very smooth and actually pretty fast compared to what I have seen in the past.

Good luck with the rest of the project!

-Dan

That’s really cool. Nice work.