<div dir="ltr">Hey guys!<div><br></div><div>I might be in the wrong here, but is this not the type of conversation that would be best carried out off-list? After the initial call for help, of course. It doesn't really bother me that much, but I'm not sure what the list rules are here. Other lists I'm on are against anything not directly on-topic.</div>
</div><div class="gmail_extra"><br clear="all"><div>____________________<br>Peace, Love, Empathy<br><br>Alexander Max Rowsell<br></div>
<br><br><div class="gmail_quote">On 7 November 2013 01:03, Michael Grant <span dir="ltr"><<a href="mailto:michael@krazatchu.ca" target="_blank">michael@krazatchu.ca</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<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/" target="_blank">http://krazatchu.ca/</a><br>
</div><div class="HOEnZb"><div class="h5"><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><div>
<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="14231288bb6648b6_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>
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