<p dir="ltr">You could always use a fake escalator. There are toys that use two pairs of stairs, one rotating eccentric from center. Hard to describe... Or use a conveyor with a stair silhouette stuck on the side! </p>
<div class="gmail_quote">On Sep 14, 2014 9:09 PM, "Adrian Jones" <<a href="mailto:adrian@woodsgood.ca">adrian@woodsgood.ca</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Anyone out there in 'makerland' got any ideas for me.<br>
For an art project, my partner, Lise, needs me to build a pair of small<br>
model escalators that run against a projected backdrop.<br>
Each escalator will have a small figurine, one ascending while the other<br>
descends.<br>
Rough estimates are that each elevator should be about 18-20" long with a<br>
6-8" elevation. For each I've been thinking about using a stepper motor<br>
driving a loop of toothed belt. The belt has one or more small triangular<br>
balsa steps glued to it. The stepper will move in one direction (ascend),<br>
stop and then reverse direction (descend) to end up at the same point, while<br>
the other does the opposite. This cycle then repeats.<br>
<br>
<br>
/| /| /|<br>
/ | / | / | <--><br>
___==/==+==/==+==/==+===============___<br>
/ \ / \\<br>
| A | | B ||<br>
\___/ \___//<br>
====================================<br>
<br>
<br>
Imagine pulley A elevated so that hypotenuse of triangur 'step' is<br>
horizontal... Get it?<br>
<br>
Thoughts, suggestions...<br>
<br>
<br>
Many thanks,<br>
<br>
.... Adrian<br>
<br>
<br>
<br>
<br>
_______________________________________________<br>
Lab mailing list<br>
1. subscribe <a href="http://artengine.ca/mailman/listinfo/lab" target="_blank">http://artengine.ca/mailman/listinfo/lab</a><br>
2. then email <a href="mailto:Lab@artengine.ca">Lab@artengine.ca</a> to send your message to the list<br>
</blockquote></div>