Let's Make Robots!

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Congratulations great job with the chassis!!!

Regarding the slots that interlock the two pieces of plastic together (gm9 motor bracket and round baseplate) if let say the acrylic is 3mm thick what is the size of the hole to accept it? I assume that due to material tolerances it should be a bit bigger.

Is it possible to have a pdf drawing with dimensions of the chassis for referance? I am trying to do a frosted acrylic cube with interlocking pieces and I don't know how to do the connections? 


Thanks a lot


Vansu's picture
IT make my ping sensor works. I though I was under power with the 4AA recharchable battery but it work great. I want to put 2 ping sensor on my rc car and so how do I start with that? Do I put both ping on the same pin? or the second ping on pin1 and do high and low for pin1? any advice is greatly appreciated.
OptimusTronic's picture
Very good. This project is great. It's very fast and the programation it's not too long.
Casca's picture

Yep, your right. I need to look at that a bit more...

 I'll try and incorporate some of the code from Fritsl's "project II" robot dealing with the head position of the servo - that should straighten it out.

The current decision routine is rubbish.

CaptainTuna's picture

what you need to do is just keep a record of the "ping" gosub you went through before. Example:

1- gosub ping 

2- record the ping value 

3- turn head

4- gosub ping

5- is this value bigger than the previous one? if yes we can just keep going this way!

6- record the ping value 

7- etc etc..

 but actually this code supposes that there is no or at least little movement in between those two gosubs.

CaptainTuna's picture

hey Casca, there's something i don't really understand about your .bas file. it says:

gosub ping
gosub ping2
if W0>W1 then
gosub motor_reverse
gosub body_lturn
gosub motor_reverse
gosub body_rturn
end if


won't the two gosubs (ping and ping2) give the same results as the head hasn't moved between the 2 gosubs?

TheOther1's picture

Great job on the entire thing!  Looks awesome, very sturdy and well though out.  You should be very proud.

BTW: If you are interested in selling a couple oif the SRF05 bracketrs, I would be interested in buying!  ;)

Casca's picture

Through Fritsl's generosity, I'll have a web shop hosted on this site very shortly - I should have the text done in a few days. In the mean time, feel free to PM me and I'll be happy to get you some brackets :-)

BaseOverApex's picture

That is amazing news. Your workmanship looks superb! All I need now is a design... 

Casca's picture

Thanks so much for the compliment. Although it won't happen overnight, I'll also post some general guidlines for design, and I think that should help with the learning curve. I'd also be happy to check over a design and try to make sure it'll fit together.

 On a side note, I've been playing with google's "shetchup" over the weekend - there is a free version available, and it offers DWG (autocad) exports as well. The package is quite friendly and in just 2 days I'm starting to get the hang of it... for those who have invested time learning a new CAD package, this is a bold statement to be sure.