New Ground Robot design.

Technical questions about electronics and sensors

Moderator: IARCadmin

Post Reply
matiasvc
Posts: 8
Joined: Tue May 05, 2015 7:48 am
Location: Norway

New Ground Robot design.

Post by matiasvc » Sun Feb 07, 2016 10:57 am

When will the "Build Your Own Mission 7 Ground Robots" section of the web page be updated? Since the rules have changed to use the iRobot Create 2 (ref. the picture in the rules) and a "tactile switch" instead of the hall effect sensors, the guide should really be updated as soon as possible.
Matias Christensen
Ascend NTNU
http://www.ascendntnu.no

Marshall_Wentworth
Posts: 3
Joined: Mon Oct 06, 2014 7:22 am
Location: Cambridge, MA

Re: New Ground Robot design.

Post by Marshall_Wentworth » Sun Feb 07, 2016 1:35 pm

Seconded.

User avatar
IARC Organizer
Posts: 19
Joined: Mon Jul 27, 2009 3:26 pm
Location: Jasper, GA, USA
Contact:

Re: New Ground Robot design.

Post by IARC Organizer » Sun Feb 07, 2016 2:13 pm

We have to assure that the American and Asia/Pacific Venues are identical in their implementation. The first step (completed) was to agree on the Official Rules edit between both venues. The inability of anyone to get original iRobot Creates necessitated our upgrade to Create 2s. This also afforded to opportunity to go to a tactical switch instead of the Hall Effect switch which was causing problems as different teams used magnets of differing strengths and therefore differing performance to activate the Hall Effect devices. A tactile switch is an easy retrofit that will react the same way for all team implementations.

Initially, the American Venue engineers designed the Create interface, controller, and software. This was provided to the Asia/Pacific Venue and to the rest of the world. This time, the Asia/Pacific Venue engineers have designed the Create 2 interface, controller, and software, so this will be tested and implemented at the American Venue and posted to the rest of the world after we verify identical operation at both venues. The designs and information have recently been received from the Asia/Pacific Venue engineers, so this process will begin as soon as the American Venue gets its Create 2s (the Asia/Pacific Venue already has theirs).

We typically don't make any changes to the Official Rules once release, except to fix typos. In this case, the discontinuation of the original iRobot Creates was beyond our control, and to allow all new teams to be able to get robots with which to test, we needed to upgrade the entire competition to the iRobot Create 2s. Insofar as the team strategies and aerial robotic behaviors go, this is a minor change, and therefore deemed acceptable.

User avatar
IARCadmin
Site Admin
Posts: 13
Joined: Mon Jul 27, 2009 2:36 pm
Location: Powder Springs, GA, USA
Contact:

Re: New Ground Robot design.

Post by IARCadmin » Tue Feb 23, 2016 9:57 am

The preliminary update for the iRobot Create 2 integration has been added to the instructions. The interface modification is trivial but does require a mini-DIN connector in lieu of the D-subminiature used on the Create 1's. The tactile top-touch interface design is still being finalized and will be posted once available.
Thanks,

IARC Webmaster

martilso
Posts: 1
Joined: Fri Apr 15, 2016 8:13 am

Re: New Ground Robot design.

Post by martilso » Sun Apr 24, 2016 5:51 am

Has there been any progress with the top-touch interface design?

User avatar
IARCadmin
Site Admin
Posts: 13
Joined: Mon Jul 27, 2009 2:36 pm
Location: Powder Springs, GA, USA
Contact:

Re: New Ground Robot design.

Post by IARCadmin » Mon Apr 25, 2016 8:08 am

The instructions are currently complete but the Create 2 interface boards just arrived this week and must be built and tested before updating the page. We have to make sure that they work flawlessly prior to public release. It is our goal to have the instructions (excluding the mechanicals for the top-touch paddle) released during the first week in May.
Thanks,

IARC Webmaster

User avatar
IARCadmin
Site Admin
Posts: 13
Joined: Mon Jul 27, 2009 2:36 pm
Location: Powder Springs, GA, USA
Contact:

Re: New Ground Robot design.

Post by IARCadmin » Fri May 06, 2016 9:57 am

Create 2 ground robot instructions are available on the team resources page or at http://www.aerialroboticscompetition.or ... ories4.php. Please note that this initial release of the instructions does not yet include top touch paddle instructions. The top touch paddle design will be released once it is finalized and validated.
Thanks,

IARC Webmaster

matiasvc
Posts: 8
Joined: Tue May 05, 2015 7:48 am
Location: Norway

Re: New Ground Robot design.

Post by matiasvc » Wed Jun 15, 2016 5:13 am

Any update on the top touch paddle design? Our team would like to start full scale testing pretty soon, but we need to know how we should design the touch pad to do so.

Would appreciate some info on this as soon as possible.
Matias Christensen
Ascend NTNU
http://www.ascendntnu.no

User avatar
IARC Organizer
Posts: 19
Joined: Mon Jul 27, 2009 3:26 pm
Location: Jasper, GA, USA
Contact:

Re: New Ground Robot design.

Post by IARC Organizer » Wed Jun 15, 2016 8:55 am

We are waiting for an order from Amazon.com to come with with some standoffs so we can completely document the construction of the ground robots photographically, but I will describe the top touch switch here.

The paddle is a 4x4 inch piece of thin material (use aluminum or composite or even something like a Home Depot linoleum floor sample) that is abut 1/16 inch thick and stiff. There is a spring pressed into a ½ inch hole in the top of the surface plate that we are mounting to the top of the robot with standoffs. This is the same top plate as described for the original ground robots (original Creates). The spring is a CFA-1050-0005-M compression spring from D.R. Templeman Company, and it is pressed all the way down into the ½ inch hole in the ½-inch thick top plate with a washer on the underside of the top plate to keep it from pushing through. The top touch switch is the one specified in the Team Resources section of the IARC website (Digi-Key Part Number: SW2004-ND).

The paddle is taped to the top plate along its rear edge with a flexible tape like "Tyvek Tape" (also available from The Home Depot). The tape acts as a low friction hinge to cantilever the top touch paddle over the spring (centered beneath the paddle). The paddle sits at about a 10 degree angle above the top plate. When depressed it contacts and closes the micro switch which is glued to the front edge of the ½ inch thick robot top plate.

This will all be shown pictorially at the IARC website as soon as our standoffs arrive and we can show the complete installation.

User avatar
IARCadmin
Site Admin
Posts: 13
Joined: Mon Jul 27, 2009 2:36 pm
Location: Powder Springs, GA, USA
Contact:

Re: New Ground Robot design.

Post by IARCadmin » Mon Jul 11, 2016 11:38 am

The top touch paddle instructions are now included in the ground robot build instructions here.
Thanks,

IARC Webmaster

Post Reply

Who is online

Users browsing this forum: No registered users and 1 guest

cron