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		<title><![CDATA[SoliForum - 3D Printing Community — The dreaded "Y" Skip]]></title>
		<link>https://www.soliforum.com/topic/5754/the-dreaded-y-skip/</link>
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		<description><![CDATA[The most recent posts in The dreaded "Y" Skip.]]></description>
		<lastBuildDate>Tue, 11 Mar 2014 18:49:11 +0000</lastBuildDate>
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			<title><![CDATA[Re: The dreaded "Y" Skip]]></title>
			<link>https://www.soliforum.com/post/51890/#p51890</link>
			<description><![CDATA[<p>I sent you a PM also</p>]]></description>
			<author><![CDATA[null@example.com (wardjr)]]></author>
			<pubDate>Tue, 11 Mar 2014 18:49:11 +0000</pubDate>
			<guid>https://www.soliforum.com/post/51890/#p51890</guid>
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			<title><![CDATA[Re: The dreaded "Y" Skip]]></title>
			<link>https://www.soliforum.com/post/51881/#p51881</link>
			<description><![CDATA[<p>Yes lube those up FYI those are the Y-Axis drive shaft&nbsp; bushings that you are referring to.</p>]]></description>
			<author><![CDATA[null@example.com (wardjr)]]></author>
			<pubDate>Tue, 11 Mar 2014 18:13:06 +0000</pubDate>
			<guid>https://www.soliforum.com/post/51881/#p51881</guid>
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			<title><![CDATA[Re: The dreaded "Y" Skip]]></title>
			<link>https://www.soliforum.com/post/51877/#p51877</link>
			<description><![CDATA[<p>Re-adjusted the x belts and rods.&nbsp; x isn&#039;t as smooth and easy as the y.&nbsp; Out of curiosity, should I lube / oil where the drive shaft for the x axis goes out the side of the case, through the brass bearing?</p><p>I do not have a fan permanently mounted but i&nbsp; have a 120mm fan, connected to a pc power supply, blowing on the board.</p>]]></description>
			<author><![CDATA[null@example.com (GorillaBob)]]></author>
			<pubDate>Tue, 11 Mar 2014 17:36:24 +0000</pubDate>
			<guid>https://www.soliforum.com/post/51877/#p51877</guid>
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			<title><![CDATA[Re: The dreaded "Y" Skip]]></title>
			<link>https://www.soliforum.com/post/51868/#p51868</link>
			<description><![CDATA[<p>Check your PM</p>]]></description>
			<author><![CDATA[null@example.com (wardjr)]]></author>
			<pubDate>Tue, 11 Mar 2014 16:22:19 +0000</pubDate>
			<guid>https://www.soliforum.com/post/51868/#p51868</guid>
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			<title><![CDATA[Re: The dreaded "Y" Skip]]></title>
			<link>https://www.soliforum.com/post/51867/#p51867</link>
			<description><![CDATA[<div class="quotebox"><cite>GorillaBob wrote:</cite><blockquote><p>I have previously loosened the stop nuts and adjusted them to make circles more round but I will give it a try again and check the VREF also.</p></blockquote></div><p>VREF&#039;s can be tricky it&#039;s a trade off to low they skip but are&nbsp; nice and quiet to high and they get noisy and can still skip. They really just need to be just right.&nbsp; Focus on the mechanical smoothness first it really doesn&#039;t take much to bind things up.&nbsp; Do you have a fan blowing on the printer board?</p>]]></description>
			<author><![CDATA[null@example.com (wardjr)]]></author>
			<pubDate>Tue, 11 Mar 2014 16:08:29 +0000</pubDate>
			<guid>https://www.soliforum.com/post/51867/#p51867</guid>
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			<title><![CDATA[Re: The dreaded "Y" Skip]]></title>
			<link>https://www.soliforum.com/post/51865/#p51865</link>
			<description><![CDATA[<p>I have previously loosened the stop nuts and adjusted them to make circles more round but I will give it a try again and check the VREF also.</p>]]></description>
			<author><![CDATA[null@example.com (GorillaBob)]]></author>
			<pubDate>Tue, 11 Mar 2014 16:01:57 +0000</pubDate>
			<guid>https://www.soliforum.com/post/51865/#p51865</guid>
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			<title><![CDATA[Re: The dreaded "Y" Skip]]></title>
			<link>https://www.soliforum.com/post/51864/#p51864</link>
			<description><![CDATA[<div class="quotebox"><cite>GorillaBob wrote:</cite><blockquote><p>Well it didn&#039;t do it as badly but still isn&#039;t good.</p></blockquote></div><p>That&#039;s no good.&nbsp; Have you loosened the set screws on the belt to motor pulleys or remove the belt.&nbsp; Then move the extruder front to back by hand to feel if it travels smoothly?&nbsp; Also the VREF could still be slightly off but you need to check for smooth motion of the mechanical side first.&nbsp; <br />Those side belts need to be aligned with each other by loosening the set screw on the drive pulley so it can rotate freely on the rear Y-shaft.&nbsp; Then adjust the tension of the side belts equally.&nbsp; Then tighten the set screw on the left side first.&nbsp; &nbsp;Move the carriage front to back until the right side feels like it is resting in a nice neutral position and tighten the left setscrew.&nbsp; Then check for smooth operation of the Y- Axis and repeat if necessary.</p>]]></description>
			<author><![CDATA[null@example.com (wardjr)]]></author>
			<pubDate>Tue, 11 Mar 2014 15:55:40 +0000</pubDate>
			<guid>https://www.soliforum.com/post/51864/#p51864</guid>
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			<title><![CDATA[Re: The dreaded "Y" Skip]]></title>
			<link>https://www.soliforum.com/post/51863/#p51863</link>
			<description><![CDATA[<p>Well it didn&#039;t do it as badly but still isn&#039;t good.</p>]]></description>
			<author><![CDATA[null@example.com (GorillaBob)]]></author>
			<pubDate>Tue, 11 Mar 2014 15:43:19 +0000</pubDate>
			<guid>https://www.soliforum.com/post/51863/#p51863</guid>
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			<title><![CDATA[Re: The dreaded "Y" Skip]]></title>
			<link>https://www.soliforum.com/post/51819/#p51819</link>
			<description><![CDATA[<p>Amen Brother! <img src="https://www.soliforum.com/img/smilies/smile.png" width="15" height="15" alt="smile" /> lol</p>]]></description>
			<author><![CDATA[null@example.com (GorillaBob)]]></author>
			<pubDate>Mon, 10 Mar 2014 21:46:50 +0000</pubDate>
			<guid>https://www.soliforum.com/post/51819/#p51819</guid>
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			<title><![CDATA[Re: The dreaded "Y" Skip]]></title>
			<link>https://www.soliforum.com/post/51816/#p51816</link>
			<description><![CDATA[<div class="quotebox"><cite>GorillaBob wrote:</cite><blockquote><p>definitely the 2nd board except it is green.&nbsp; I plugged an old 120mm fan into an old power supply and set it on the counter behind the machine.&nbsp; I have it printing the last design it messed up on.</p></blockquote></div><p>fingers crossed?</p>]]></description>
			<author><![CDATA[null@example.com (wardjr)]]></author>
			<pubDate>Mon, 10 Mar 2014 20:42:30 +0000</pubDate>
			<guid>https://www.soliforum.com/post/51816/#p51816</guid>
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			<title><![CDATA[Re: The dreaded "Y" Skip]]></title>
			<link>https://www.soliforum.com/post/51812/#p51812</link>
			<description><![CDATA[<p>definitely the 2nd board except it is green.&nbsp; I plugged an old 120mm fan into an old power supply and set it on the counter behind the machine.&nbsp; I have it printing the last design it messed up on.</p>]]></description>
			<author><![CDATA[null@example.com (GorillaBob)]]></author>
			<pubDate>Mon, 10 Mar 2014 20:25:24 +0000</pubDate>
			<guid>https://www.soliforum.com/post/51812/#p51812</guid>
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			<title><![CDATA[Re: The dreaded "Y" Skip]]></title>
			<link>https://www.soliforum.com/post/51808/#p51808</link>
			<description><![CDATA[<p>The &quot;original&quot; board that came with the SD3 was the Sanguinololu.&nbsp; Sometime mid last year they switched to the Printrboard.&nbsp; Take a look at your board in the back.&nbsp; Which one does it look like?</p><p>Here is a Sanguinololu<br /><span class="postimg"><img src="http://reprapbook.appspot.com/images/Sanguinololu.jpg" alt="http://reprapbook.appspot.com/images/Sanguinololu.jpg" /></span></p><p>Here is a Printrboard<br /><span class="postimg"><img src="http://makemendel.com/media/catalog/product/cache/1/thumbnail/600x600/9df78eab33525d08d6e5fb8d27136e95/i/m/img_5475.jpg" alt="http://makemendel.com/media/catalog/product/cache/1/thumbnail/600x600/9df78eab33525d08d6e5fb8d27136e95/i/m/img_5475.jpg" /></span></p><p>Notice that the Printrboard doesn&#039;t have plug-in type steppers like the Sanguino.&nbsp; On both boards you can adjust the voltage (vRef) using the little trimpot.&nbsp; Adrian has posted a tutorial on ho how to adjust the vRef and the values you should adjust to.&nbsp; Do a search for vRef adjustment or tuning.</p><p>Even without that reference.&nbsp; Try adjusting the &quot;Y&quot; trimpot clockwise just a little, 1/8th of a turn, and see if it helps.</p>]]></description>
			<author><![CDATA[null@example.com (pirvan)]]></author>
			<pubDate>Mon, 10 Mar 2014 19:58:38 +0000</pubDate>
			<guid>https://www.soliforum.com/post/51808/#p51808</guid>
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			<title><![CDATA[Re: The dreaded "Y" Skip]]></title>
			<link>https://www.soliforum.com/post/51806/#p51806</link>
			<description><![CDATA[<p>What I can tell you is if everything mechanically moves smoothly and the belts aren&#039;t binding.&nbsp; You can use a cheap meter or do it like I do and adjust by ear.&nbsp; Set that axis to move slowly and ever so slightly adjust it until the motor sounds as smooth as possible.&nbsp; Before you adjust it you could place a small desk fan at that board to see if it is temperature related.&nbsp; Adjusting the VREF&#039;s isn&#039;t as hard as it sounds just use a ceramic screwdriver or the like.&nbsp; It only takes a very small adjustment to make a big difference.</p>]]></description>
			<author><![CDATA[null@example.com (wardjr)]]></author>
			<pubDate>Mon, 10 Mar 2014 19:45:52 +0000</pubDate>
			<guid>https://www.soliforum.com/post/51806/#p51806</guid>
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			<title><![CDATA[Re: The dreaded "Y" Skip]]></title>
			<link>https://www.soliforum.com/post/51804/#p51804</link>
			<description><![CDATA[<p>No, I have never checked the vref, for the Y axis correct?&nbsp; Is there a link to a &quot;How To&quot; video or instructions?&nbsp; Will I need an Fluke meter or will a Harbor Freight cheepy be good enough?</p><p>I was reading on another thread and they mentioned the motor being a little week for the job.&nbsp; Is that something I should look into replacing?&nbsp; </p><p>The printer is being used in my Jr. High Computer class and repairs and replacements will probably have to come out of my pocket.&nbsp; It is too hard getting the school district to do anything.</p>]]></description>
			<author><![CDATA[null@example.com (GorillaBob)]]></author>
			<pubDate>Mon, 10 Mar 2014 19:24:46 +0000</pubDate>
			<guid>https://www.soliforum.com/post/51804/#p51804</guid>
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			<title><![CDATA[Re: The dreaded "Y" Skip]]></title>
			<link>https://www.soliforum.com/post/51799/#p51799</link>
			<description><![CDATA[<p>If you don&#039;t have a fan on that board you need to.&nbsp; I would think any 12V pins available would handle a small fan.&nbsp; Otherwise tie directly into the input power.</p>]]></description>
			<author><![CDATA[null@example.com (wardjr)]]></author>
			<pubDate>Mon, 10 Mar 2014 19:08:00 +0000</pubDate>
			<guid>https://www.soliforum.com/post/51799/#p51799</guid>
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