<div dir="ltr"><br><div>Another option is to use a vinyl banner as we do for the line following courses these days.</div><div><br></div><div>Our go-to resource is <a href="https://www.stickersbanners.com/">https://www.stickersbanners.com/</a> (Thanks Again Ron Grant!)</div><div><br></div><div>It's $1.75 / square foot, including delivery, with a 2' x 2' minimum and 8' x 50' maximum.</div><div><br></div><div>So a little more expensive than the foam squares - but offering different trade-offs versus foam.</div><div><br></div><div>Just un-roll and place in the same location for repeatability. Then roll it up to store in a closet - ie. so you don't have to keep tape on the floor in your living space / laboratory for weeks on end...</div><div><br></div><div>You can print whatever pattern you want - with
pre-measured waypoints or fiducial markers or something to help with navigation.</div><div><br></div><div>Submit a 300 DPI PNG, and the banner will show up on your doorstep in just a few days. Make your own pattern with an SVG and output a PNG, then you're good to go.</div><div><br></div><div>You can find several ready-to print DPRG line following course samples here</div><div><a href="https://github.com/dprg/Contests/tree/master/Line%20Following/Test%20Courses/Challenge%20Test%20Courses">https://github.com/dprg/Contests/tree/master/Line%20Following/Test%20Courses/Challenge%20Test%20Courses</a><br></div><div><br></div><div>If your robot drives in a relatively repeatable way, you can save cost by creating a path with several 2 foot strips of banner. Or even cut down to 1 foot strips like the 'airplane friendly' sample does.</div><div><br></div><div><br></div><div>- Carl</div><div><br></div><div><br></div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jan 15, 2021 at 5:54 PM Karim Virani via DPRGlist <<a href="mailto:dprglist@lists.dprg.org">dprglist@lists.dprg.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">If you're not willing to sacrifice your pretty wood floors to the needs of our future overlords, maybe you've got a priority inversion, said the mad scientist.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jan 15, 2021 at 3:36 PM Murray Altheim via DPRGlist <<a href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On 16/01/21 9:10 am, Patrick R. Michaud via DPRGlist wrote:<br>
> [...] So to echo Karim, I always use gaffers tape in these floor-taping<br>
> situations, but it's not a perfect solution. I'd be reluctant to tape<br>
> my hardwood floor directly, but I also have other options (foam tiles<br>
> etc) that I can use to create a robot playing surface.<br>
<br>
An expensive fix to a damaged wood floor due to tape seems like an<br>
avoidable situation.<br>
<br>
On the subject of foam tiles, I just checked our local hardware store and<br>
they sell black, interlocking 24" square foam tiles for about NZ$9/US$6<br>
per square meter. It looks like KMart sells a four-pack of them in four<br>
colors for $12, a four pack of the black ones for $11. You pay extra for<br>
color.<br>
<br>
In the US, where everything is more available, I checked <a href="http://foamtiles.com" rel="noreferrer" target="_blank">foamtiles.com</a><br>
(flooring geeks!) in Meza, AZ, and they sell tiles with rubber tops,<br>
carpet tops, wood patterns, and martial arts mats (e.g., 2x2' US$7.56,<br>
3'x3' US17 per tile). Male or female beveled edge, beveled corners, lots<br>
of options. It looks like the low end of their line of interlocking tiles<br>
runs about US$1.20/sq. ft, e./g.<br>
<br>
<a href="https://www.foamtiles.com/interlocking-tile/foam/12-eco-soft-tile.html" rel="noreferrer" target="_blank">https://www.foamtiles.com/interlocking-tile/foam/12-eco-soft-tile.html</a><br>
<br>
They're don't ship outside of the US so I'd have to find a different<br>
supplier, but it seems these foam tiles are not hard to source.<br>
<br>
So maybe the easiest solution is to use these interlocking foam tiles.<br>
They'd provide good traction and could be taken apart and stored when not<br>
in use. White tape on black tile would do fine. Or black tape on pink. It<br>
would even be possible to print out the DPRG line following course, spray<br>
glue it to a set of tiles, then laboriously cut the zig zags with an xacto<br>
knife. But I'm not suggesting anyone tackle that -- it seems a particular<br>
sort of torture. But there's a solution to that too, though I have no idea<br>
what it'd cost: custom mats from SoftTiles.com:<br>
<br>
<a href="https://softtiles.com/pages/corporate-projects" rel="noreferrer" target="_blank">https://softtiles.com/pages/corporate-projects</a><br>
<a href="https://i.shgcdn.com/23d74f3e-4e97-4830-a95a-c01c83aefcc6/-/format/auto/-/preview/3000x3000/-/quality/lighter/" rel="noreferrer" target="_blank">https://i.shgcdn.com/23d74f3e-4e97-4830-a95a-c01c83aefcc6/-/format/auto/-/preview/3000x3000/-/quality/lighter/</a><br>
<br>
[Legal Notice: I hold no fiduciary interest in <a href="http://foamtiles.com" rel="noreferrer" target="_blank">foamtiles.com</a> or any other<br>
foam tile wholesale or retail establishment.]<br>
<br>
I might see if they sell these at the local KMart here in NZ. Two four<br>
packs would be the size of a sheet of plywood and cost about $22.<br>
<br>
Nice solution.<br>
<br>
Cheers,<br>
<br>
Murray<br>
<br>
...........................................................................<br>
Murray Altheim <murray18 at altheim dot com> = = ===<br>
<a href="http://www.altheim.com/murray/" rel="noreferrer" target="_blank">http://www.altheim.com/murray/</a> === ===<br>
= = ===<br>
In the evening<br>
The rice leaves in the garden<br>
Rustle in the autumn wind<br>
That blows through my reed hut.<br>
-- Minamoto no Tsunenobu<br>
<br>
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