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<p>Fantastic! I had no idea that SPD-SI.com would have the cad files for their stuff. I can see that being very handy in the future!</p>
<p>Aaron</p>
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<p>On Fri, 8 Jul 2011 12:32:26 -0400, Darcy Whyte wrote:</p>
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<div>Thanks Arron...</div>
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<div>I managed to improvise and make a pulley out of hardboard (like MDF). <a href="http://mambohead.com/2011/07/diy-timing-pulley/">http://mambohead.com/2011/07/diy-timing-pulley/</a></div>
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<div>It should hold the fort for a while until I can make one out of aluminum using the completed A-Axis.</div>
<div>I might break down and get one of those gear programs. They look fun.</div>
<div>But I found a way to get CAD files. You can download them for any part at <span class="Apple-style-span" style="font-family: verdana; font-size: 13px; line-height: 18px;">SPD-SI.com.</span></div>
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<div>Darcy</div>
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<div class="gmail_quote">On Wed, Jul 6, 2011 at 10:05 AM, <span><<a href="mailto:aaron@ottawarobotics.org">aaron@ottawarobotics.org</a>></span> wrote:<br />
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<p>CamBam can generate timing gears for a regular 2.5D mill/router. The problem with cutting it that way is that you don't get nice sharp edges inside the teeth. I suppose you could do the first pass with a larger cutting tool to quickly cut the outline and then switch to a smaller tool to get better tooth definition.</p>
<p>An A axis definitely makes better teeth though.</p>
<p>A tool like this : <a href="http://svstuff.com/Gears/">http://svstuff.com/Gears/</a> does a nice job. Or <a href="http://www.cad2gcode.com/pulley/">http://www.cad2gcode.com/pulley/</a></p>
<p>The better one is likely Gearotic (<a href="http://gearotic.com/index.html">http://gearotic.com/index.html</a>) from the same guy that does Mach3 for your CNC machine, but it possibly is overkill for what you need.</p>
<p>If you dig around there are some free plug-ins or g-code generators that will do timing gears for free but I'd likely spend the $12 or $20 to get one of the nicer ones from above.</p>
<p>Aaron</p>
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<p>On Wed, 6 Jul 2011 09:47:40 -0400, Darcy Whyte wrote:</p>
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<p>I'm just about to go to General Bearing Service to pick up a timing pulley. Once I have it and I complete my A-Axis for my mill I will be able to make pulleys. </p>
<div>Does anybody know the exact shape of a timing pulley? I don't care about the flanges, just the teeth. Perhaps I could try and make one with a 3-Axis mill? Is there a code generator for that around? Or some shapes that will work?</div>
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