scout walk

I cant seem to get my scout to walk…It works ok but I dont have the seq prog…and was wondering if anybody had the code for a simple walk…
I have seen some on the forums but they were for the atom pro…I have just the atom 28…
I dont have the SEQ prog. yet!

any help??

here’s some pics–>

mysite.verizon.net/vzevvwaz/projectscout

tkx

Hi Sheldon,

My advice is to start a table for the gait sequences to keep track of all the pulse widths of each servos.  I created a table on excel for this purpose.

That way, you can always go back and tweak a little bit of each step of the gait to make it more stable, efficient, higher clearance, and etc…

Also, you have to consider these things: how many sequences? The more sequences, the smoother it is. Also, how fast do you want the servo to go during transit? The slower the transit time, the more stable, since you won’t get nasty transient effects of a fast transit. But the more sequences you have and the slower the transit, the scout would end up travelling very slowly overall.

It’s a balance of those factors.

The major road block I faced was weak servos. Are your servos up to par? The scout requires quite a bit of torque. So depending on how high of clearance from the ground you want per step, you might need to go to a stronger servo then a 5645MG.

The higher ground clearance you want for the lifting leg, the longer your planted leg will have to support the weight…

yea
I have 645’s in it not digital

they seem to be ok but the problem is I dont have the SEQ software…
so I’m inputing it through lynxterm…slow and tedious…

by the time I figure out the next step the servos start to “sag” always when the foot is of the ground…

I washoping someone had a setup already done so I could tweak it to meet my setup…

tkx

My advice:

You’ve spent probably close to a grand? on your scout.

Spring for the $40 and pickup the SEQ software, makes it a lot easier.

yes
I am working on it…

I’m getting the hang of it…learning as I go…

need to get the smirf into 38400 baud…

any ideas? I went to the sparkfun site and got the at command stuff…wow :open_mouth:
really cofusing and not user friendly…the info here on the smirf only shows how to get it to 115,200…doesnt explain the numbers…I cant decipher them…

bit o’ help? :unamused:

tkx

If you received from them a link to the blue world command set stuff, I think the answer is on page 34. I believe that from their table there, the value is: 157. They do also have an equation up there that shows that value is: BAUDRATE *0.004096

Good Luck

:smiley: :smiley: :smiley:

TKX

How’d I miss that…maybe 'cause it was 6 am and I didn’t get to sleep yet.!

really like to thank all you guyz…

great support…

still workin on my stuff…got to many projects in the works…

got one of those r/c tanks from wal-mart and have my own r/c setup in it
i’ll get a pic of it and put it up…

tkx agin!!

Maybe you can incorporate the multi-leg+r/c tank project that was floating around in one of these threads… The concept was really neat, the legs folded up for the treads and folded out for leg-mode…

Tracks are a great platform for a rover-style bot. LM sells really nice tracks, you might want to check out that section of the topic, lots of Johnny 5 stuff there!

:slight_smile:

yea I saw that…

I am going to try to make a quad with 1/4 size servos…

I am going to try to see if I can get his patterns…

The tank I have I am going to incorperate the quad so it can walk around after the tank gets to its target…that target would be a rocket…
I am handicaped and I launch high power rockets…but they don’t land close enough due to conditions at launch…sometimes TO FAR for me to walk so I always get a fellow rocketeer to retrieve them for me…

With the tank and the quad I should be able to gather up the rocket and place it on the tank to bring it back…

I want tele-operated so I can see the task and maybe even use gps for tracking so as to not go crazy “looking” for it…then autonomous return even…

Would be Neat…Kool…huh :stuck_out_tongue:

Sheldon,

Evolution made a giant hex with quarter scale servos, and he got that to work, but when he tried to add the tracks they couldn’t support the weight.

Also, linuxguy is working on a walk and roll chassis as well.

You should probably contact those two to make sure that you get any lessons learned from them, to help you along your path.

Maybe instead of a walking chassis, it might be easier to build a giant tank style chassis with a good arm? What kind of terrain do you anticipate the tank treads won’t stand?

Hey Sheldon, is this what you are looking for:

I just thought of that when you stated that you needed something that’ll retrieve your rocket.

Walk 'N Roll has been stalled for awhile, and I don’t know if I will ever be able to actually build it.

8-Dale

hey
tkx for the input…

My idea was that the tank can go almost anywhere but when it gets to the rocket it will have to be brought together and them placed on the tank to be brought back…

The rocket will be in its deployed state, that means 3 sections

  1. the nose
  2. the payload or mid section with all the electronics
  3. the tail or fin section where the motor is.

now all of these will be connected by shock cords that have to be brought together and loaded onto the carrier (tank) to be driven back to where I am…

the walker will be more agile to “walk” around to gather it all together…

I’ll put a picture up of what it involves later…but you get the idea

tkx
:smiley:

What is the size and weight of the rocket?

You don’t need the sequencer to get the robot to walk. I wrote a visual basic app that is designed to teach these robots to walk, and it will even write the Basic Stamp code so that a Basic Stamp can drive these robots around.

Pete

Here’s some pics…
mysite.verizon.net/vzevvwaz/id12.html

as you can see there is a lot of stuff to gather and put on the tank platform…

I’m thinking of a grappler type device to help tip up and “load” the parts…

I want the 1/4 quad to run around and bring the parts over to the tank platform to help load as well as arange it…

hexwalker is running… :smiley:

I have 475’s on the inside and outside joints with the mid joint uses a 645…

works good but draws way to much power for the wall pack…my amp meter jumps over 10 amps when all servos are really working…WoW :open_mouth:

I need to get some battery power…cant afford it yet…

ck the multi and/or the project forum for more details and pics!

:smiley: