1022 replies to this topic

[efferman]

i have tried several setups in timing the steps and every exception the 10178 timing was looking really funny. so i think every unsynhronized movement is not an good idea
the most stable way would be the following:
3 legs are on ground and moving with the same speed backward. the fourth leg is moving in the opposite direction with the foot in the air. this leg should move in a speed that it hits the ground, before the next leg loose the ground contact and moves forward.
unfortunately i dont have an idea to realize this with an mechanical solution

[Alasdair Ryan]

Surly that is just down to gearing the legs differently?

[efferman]

sorry but it seems that understanding of inglish is out of order when i read your last post. could you please describe it in other words?

[Alasdair Ryan]

If you gear three legs that are the same speed as each other,and then gear the last one differently (like what you said above) then will that not improve the steering of the walker?

[efferman]

the problem is not the steering, the problem is the stability in general. two legs in air makes it simply wobbly

[efferman]

7th prototype, only the feet needs to adjust a little and the receiver needs  the final place.

[jorgeopesi]

Is an interesting mechanic challenge, would it work to use 1 motor for each pair of legs on one side and slow it down to make the turn?.

[Alasdair Ryan]

Two more little suggestions:

1) What about using small LA's on each leg to increase the steering?
2)what about attaching some of the rubber connecters horizontal to the ground to stop the legs slipping.

[efferman]

jorgeopesi, on 01 June 2013 - 11:33 AM, said:

Is an interesting mechanic challenge, would it work to use 1 motor for each pair of legs on one side and slow it down to make the turn?.

hm, with an 8 legged walker like some of the clone wars walkers should it work, but on a four legged? it needs to try to find it out.

Alasdair Ryan, on 01 June 2013 - 11:34 AM, said:

Two more little suggestions:

1) What about using small LA's on each leg to increase the steering?
2)what about attaching some of the rubber connecters horizontal to the ground to stop the legs slipping.

1.) all leg steering? maybe this could give problems with the center of gravity
2.) good idea. i will try this in modifying the feet.

[Alasdair Ryan]

You have all ready improved the steering a lot,but maybe if you still require more responsive steering then it could be a option.
I am unsure what such a mechanism will do on the 'balancing side' of things.

[efferman]

Alasdair Ryan, on 01 June 2013 - 12:12 PM, said:

I am unsure what such a mechanism will do on the 'balancing side' of things.

i can not placed the motors and battery box at the current place. currently it is more or less well balanced. for all leg steering i must place the motors more in front and the battery box higher or/and more forward.

[Alasdair Ryan]

efferman, on 01 June 2013 - 12:28 PM, said:

i can not placed the motors and battery box at the current place. currently it is more or less well balanced. for all leg steering i must place the motors more in front and the battery box higher or/and more forward.

Ah,yet another good use for a PF micro-motor....
What about steering the back legs as well as the front ones?

[efferman]

the same reason

[Alasdair Ryan]

I think you should try motorizing both front ones and rear ones independently.
If you find that there is a bit off misalignment between legs, you could always gear it up/down to synchronize the legs.

Edited by Alasdair Ryan, 01 June 2013 - 01:00 PM.

[Zblj]

Alasdair Ryan, on 01 June 2013 - 12:43 PM, said:

I think you should try motorizing both front ones and rear ones independently.

That would desynchronise the legs.

[efferman]

nice idea, then a sound modul with a "wuff" and i can make them sit like a dog.

[Zblj]

Like this?

[Alasdair Ryan]

Zblj, on 01 June 2013 - 01:00 PM, said:

That would desynchronise the legs.

Add gearing....

efferman, on 01 June 2013 - 01:00 PM, said:

nice idea, then a sound modul with a "wuff" and i can make them sit like a dog.

Lego do already make a roar sound brick.

Zblj your Dino is doing the moon walk.

Edited by Alasdair Ryan, 01 June 2013 - 01:05 PM.

[efferman]

yes zblij
btw, cool creation

[grego18f]

hi,
great mocs .
But I've seen in the previous pages that for your logging truck, you have made a crane. If it's already build, can you post pics of the crane basement?

[efferman]

did you mean this cranebase?



i think i have finalized the steering mod



you can find the lxf file here

Edited by efferman, 02 June 2013 - 09:21 PM.

[grego18f]

efferman, on 02 June 2013 - 09:20 PM, said:

did you mean this cranebase?



i think i have finalized the steering mod



you can find the lxf file here

No, I didn't explain correctly, sorry
I'm talking about the part of the crane with LAs, if you see what I mean.
Really good AT-AT to .

[efferman]

no, the boom doesnt exist yet