<div dir="ltr"><div><div><div>I'm sure a NEMA 17 size stepper would suit purpose.<br></div>The EasyDriver is more than capable for this application.<br><br></div>Michael<br>--<br></div><a href="http://krazatchu.ca/">http://krazatchu.ca/</a><br>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Nov 6, 2013 at 5:37 PM, Wesley Ellis <span dir="ltr"><<a href="mailto:tahnok@gmail.com" target="_blank">tahnok@gmail.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">My project involves rotating the platform by small increments then checking if there's something in range with an ultra sonic sensor, so a stepper motor where I can move my platform by a fixed amount easily seemed like a better idea than a regular motor and deriving my distance travelled based on how long I had the motor on for.</p>
<div class="HOEnZb"><div class="h5">
<div class="gmail_quote">On Nov 6, 2013 10:22 AM, "Chris de Groot" <<a href="mailto:cdegroot@adobe.com" target="_blank">cdegroot@adobe.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="white" link="blue" vlink="purple" lang="EN-US"><div><p class="MsoNormal"><a name="1422f904afba2ea2_1422e01fd3258ff4__MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#004a00">It would be interesting to know how Wesley decided a stepper motor was suitable for your use case.<u></u><u></u></span></a></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#004a00"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#004a00">There are several of different options.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#004a00">Stepper Motors are good for very precise control of fairly slow rotation where you may also want to rotate by very precise amounts. They have downsides, they require a lot of electronics and often some software to work, are not that powerful relative to other motors, consume more amps for similar work and are more expensive.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#004a00"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#004a00">If you wanted to do something like rotate a platform continuously, even reversing it backwards and forwards, and did not care too much about fine accuracy or specific speeds a regular motor may be something to look at. For example a windscreen wiper motor(from princess auto surplus) is a nice usable package. With a small amount of electronics you can get speed control and backwards/forwards motion.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#004a00"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#004a00">Consider this simple circuit for a “most useless machine ever” project. Simple and effective </span><a href="http://9x20lathe.blogspot.ca/2010/01/components-and-schematic-for-useless.html" target="_blank">http://9x20lathe.blogspot.ca/2010/01/components-and-schematic-for-useless.html</a><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#004a00"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#004a00"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#004a00">Speed control is fairly easy with a regular motor. But for a stepper can actually get pretty complex with ramp up and down for starts and stops etc.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#004a00"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#004a00">C.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#004a00"><u></u> <u></u></span></p><div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> Lab [mailto:<a href="mailto:lab-bounces@artengine.ca" target="_blank">lab-bounces@artengine.ca</a>] <b>On Behalf Of </b>Bob<br>
<b>Sent:</b> Tuesday, November 05, 2013 8:05 PM<br><b>To:</b> <a href="mailto:Lab@artengine.ca" target="_blank">Lab@artengine.ca</a><br><b>Subject:</b> Re: [Lab] Help choosing a stepper motor<u></u><u></u></span></p></div>
</div><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">As a non-technical person my suggestion may be way off base, but perhaps working with the guts of a scanner would fit the bill. Motor and belt already to go.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Bob<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in"><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> Lab [<a href="mailto:lab-bounces@artengine.ca" target="_blank">mailto:lab-bounces@artengine.ca</a>] <b>On Behalf Of </b>Wesley Ellis<br>
<b>Sent:</b> Tuesday, November 05, 2013 7:28 PM<br><b>To:</b> Michael Grant<br><b>Cc:</b> lab<br><b>Subject:</b> Re: [Lab] Help choosing a stepper motor<u></u><u></u></span></p></div></div><p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">No, the stepper motor is going to drive a pulley to rotate a platform<u></u><u></u></p><div><p class="MsoNormal">On 11/4/2013, 9:52 PM, Michael Grant wrote:<u></u><u></u></p>
</div><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><div><div><div><p class="MsoNormal" style="margin-bottom:12.0pt">Does the mass need to be lifted against gravity?<u></u><u></u></p></div><p class="MsoNormal">
Michael<br>--<u></u><u></u></p></div><p class="MsoNormal"><a href="http://krazatchu.ca/" target="_blank">http://krazatchu.ca/</a><u></u><u></u></p></div><div><p class="MsoNormal" style="margin-bottom:12.0pt"><u></u> <u></u></p>
<div><p class="MsoNormal">On Mon, Nov 4, 2013 at 9:45 PM, Wesley Ellis <<a href="mailto:tahnok@gmail.com" target="_blank">tahnok@gmail.com</a>> wrote:<u></u><u></u></p><p>The mass isn't very heavy (probably 500g) and I don't need the resolution of something like a cnc or 3d printer motor and speed isn't super important<u></u><u></u></p>
<div><div><div><p class="MsoNormal">On Nov 4, 2013 9:36 PM, "Michael Grant" <<a href="mailto:michael@krazatchu.ca" target="_blank">michael@krazatchu.ca</a>> wrote:<u></u><u></u></p><div><div><div><div><div>
<div><p class="MsoNormal">The easy driver is for bipolar only, it's a good choice for small steppers (NEMA17). <u></u><u></u></p></div><div><p class="MsoNormal"><br>There are many choices on eBay as well, about $11 will get you a serious CNC driver for larger steppers (NEMA23).<br>
<a href="http://www.ebay.ca/itm/Good-CNC-Router-Single-1-Axis-Controller-Stepper-Motor-Drivers-TB6560-3A-New-/251369064893?pt=LH_DefaultDomain_0&hash=item3a86c389bd" target="_blank">http://www.ebay.ca/itm/Good-CNC-Router-Single-1-Axis-Controller-Stepper-Motor-Drivers-TB6560-3A-New-/251369064893?pt=LH_DefaultDomain_0&hash=item3a86c389bd</a><u></u><u></u></p>
</div><p class="MsoNormal"><u></u> <u></u></p></div><p class="MsoNormal">What resolution and speed are you looking to achieve? <u></u><u></u></p></div><p class="MsoNormal" style="margin-bottom:12.0pt">The mass you are rotating, is it heavy and will you require fast start and stop?<u></u><u></u></p>
</div><p class="MsoNormal">Michael Grant<br>--<u></u><u></u></p></div><p class="MsoNormal"><a href="http://krazatchu.ca/" target="_blank">http://krazatchu.ca/</a><u></u><u></u></p></div><div><p class="MsoNormal" style="margin-bottom:12.0pt">
<u></u> <u></u></p><div><p class="MsoNormal">On Mon, Nov 4, 2013 at 9:22 PM, Wesley Ellis <<a href="mailto:tahnok@gmail.com" target="_blank">tahnok@gmail.com</a>> wrote:<u></u><u></u></p><p class="MsoNormal">Hey all,<br>
<br>I'm pretty new to electronics and I'm having trouble choosing a stepper<br>motor for a project I'm working on.<br><br>I'm ordering from robot shotp, and it looks like this EasyDriver board<br>(<a href="https://secure.robotshop.com/ca/en/sfe-easydriver-bipolar-stepper-motor-driver.html" target="_blank">https://secure.robotshop.com/ca/en/sfe-easydriver-bipolar-stepper-motor-driver.html</a>)<br>
will let me control whichever motor I end up choosing, but the number of<br>motors on robotshop is pretty intimidating.<br><br>I'm going to be spinning a small platform so I don't need a lot of<br>power. Basically, I'm wondering whether I need a bipolar or unipolar<br>
motor? What kind of voltage? Amperage? Any help would be appreciated<br><span style="color:#888888"><br>Wesley<br><br></span><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" target="_blank">Lab@artengine.ca</a> to send your message to the list<u></u><u></u></p></div><p class="MsoNormal"><u></u> <u></u></p></div></div></div></div></div><p class="MsoNormal">
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