More line tracking videos

[Greg McKaskle]

Are the LEDs toggling as expected when passing over the line? I found it useful to leave the robot disabled, and simply push it to pivot over the lines. Turn the trim knobs on the sensors if necessary using the LEDs to identify the value of the sensor.

The tutorial at http://decibel.ni.com/content/commun...#/?tagSet=1001 in the lower left will lead you through some things to think about.

The stop after four seconds is happening because the code interprets three sensors true differently before four seconds and after. After four seconds, it assumes the robot has reached the T and it halts. Before four seconds, it assumes it is the Y or a sharp angle and keeps going.

Also, if your robot has only driven two feet in four seconds, it sounds like the gearing is far different from the kitbot. You may need to adjust the forward speed, the Y value to make better progress.

Greg McKaskle

[aldaeron]

Has anyone tried using the official carpet? Per the rules the official carpet is S&S Mills, Sequoia 20 Oz. Level Loop Pile, Color: Ground Pepper. Has anyone even found this carpet? I was not able to find it on S&S's website. From the color photo in the game manual the carpet appears to be a light or medium grey color.

My concern here is that all these videos show contrasting color line following (i.e. light tape, dark carpet), but according today's team update the gaff tape is also grey. The color photo in the game manual makes the greys appear to have some contrast.

In any case teams may want to consider making their line following easy to modify. Or try testing line following with grey on slightly darker grey.

[JB987]

Originally Posted by aldaeron

Has anyone tried using the official carpet? Per the rules the official carpet is S&S Mills, Sequoia 20 Oz. Level Loop Pile, Color: Ground Pepper. Has anyone even found this carpet? I was not able to find it on S&S's website. From the color photo in the game manual the carpet appears to be a light or medium grey color.

My concern here is that all these videos show contrasting color line following (i.e. light tape, dark carpet), but according today's team update the gaff tape is also grey. The color photo in the game manual makes the greys appear to have some contrast.

In any case teams may want to consider making their line following easy to modify. Or try testing line following with grey on slightly darker grey.

Call Debbie at S and S Mills...1-800-241 4013. We ordered the FIRST standard ground pepper (grey) carpet, 20 oz, Olefin commercial loop carpet and it arrives tomorrow for our new field. We bought two 60 ft.x 15 ft. rolls for $1500 total (includes shipping). Be sure to identify yourself as a FIRST team.

[aldaeron]

Originally Posted by JB987

Call Debbie at S and S Mills...1-800-241 4013. We ordered the FIRST standard ground pepper (grey) carpet, 20 oz, Olefin commercial loop carpet and it arrives tomorrow for our new field. We bought two 60 ft.x 15 ft. rolls for $1500 total (includes shipping). Be sure to identify yourself as a FIRST team.

We already have carpet for testing and can't afford a full new field. Can you take some pics when the carpet arrives and post them here?

Thanks!