<div dir="ltr"><div><div><div><div>Wow ! Loads of interesting links and ideas !<br><br></div>Its a very slow rotation, so inertia is not a problem. <br><br></div>Is a 'RAMPS 1.4' useful ? what does it do ?<br><br></div>Many thanks to all who have responded !<br><br>: )))<br><br></div>Tim_1<br></div><div class="gmail_extra"><br><div class="gmail_quote">On 18 April 2015 at 13:57, oliver Oliver <span dir="ltr"><<a href="mailto:oliver@oliverjenkins.com" target="_blank">oliver@oliverjenkins.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">Think about pulleys or gears. I don't know if you want the pole to stop at a particular point or not. Inertia in 1m pole will be higher than braking force of a stepper motor. So it will continue to spin after you stop the motor. Giving you an unpredictable 180 plus rotation.</p>
<p dir="ltr">For a pulley arrangement look at t5 timing belts. you can easily print the pulleys using a reprap. There are libraries on thingiverse.</p>
<p dir="ltr">A worm gear would be better, but you can't print those.</p>
<p dir="ltr">Oli<br></p>
<div class="gmail_quote"><div><div class="h5">On 18 Apr 2015 12:33, "Tim Moore" <<a href="mailto:timmoore47@gmail.com" target="_blank">timmoore47@gmail.com</a>> wrote:<br type="attribution"></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5"><div dir="ltr"><div><div><div><div><div><div>I'm trying to carefully rorate a metre long light weight pole through 180 degrees.<br><br></div>I've got a Stepper Motor type 28BYJ-48 working fine, but I'm sure I need one that is a bit more chunky !<br><br></div>I've got a <font face="Arial" size="3">17HS16-2004S</font><span style="color:rgb(34,34,34);font-family:arial,helvetica,sans-serif;font-size:16px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);display:inline!important;float:none"><span> </span>NEMA 17 (42 x 42 mm) high torque 1.8 degree stepper motor on the way with a controller card<br><br></span></div><span style="color:rgb(34,34,34);font-family:arial,helvetica,sans-serif;font-size:16px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);display:inline!important;float:none">But I've not got a very clear vision yet what else I might need and if there is any Arduino example software listing that would be good to use to get it to work ?<br><br></span></div><span style="color:rgb(34,34,34);font-family:arial,helvetica,sans-serif;font-size:16px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);display:inline!important;float:none">I don't want to reinvent the wheel ! *LOL*<br><br></span></div><span style="color:rgb(34,34,34);font-family:arial,helvetica,sans-serif;font-size:16px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);display:inline!important;float:none">Any thoughts anyone ?<br><br>: )))<br><br></span></div><span style="color:rgb(34,34,34);font-family:arial,helvetica,sans-serif;font-size:16px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);display:inline!important;float:none">Tim_1<br></span></div>
<br></div></div><span class="">_______________________________________________<br>
Hackspace mailing list<br>
<a href="mailto:Hackspace@swansea.hackspace.org.uk" target="_blank">Hackspace@swansea.hackspace.org.uk</a><br>
<a href="http://swansea.hackspace.org.uk/mailman/listinfo/hackspace" target="_blank">http://swansea.hackspace.org.uk/mailman/listinfo/hackspace</a><br>
<br></span></blockquote></div>
<br>_______________________________________________<br>
Hackspace mailing list<br>
<a href="mailto:Hackspace@swansea.hackspace.org.uk">Hackspace@swansea.hackspace.org.uk</a><br>
<a href="http://swansea.hackspace.org.uk/mailman/listinfo/hackspace" target="_blank">http://swansea.hackspace.org.uk/mailman/listinfo/hackspace</a><br>
<br></blockquote></div><br></div>