<p>I have made a custom 3D printer with RAMPS electronics. I have printed a Benchy (ship) well, but when I try to print anything with teeth (spiral vase), gears (bearing), or a circle (rocket), the Y-axis skip steps in a regular rate giving 70-60 degrees skew along the printing the Y-direction, but each layer is perfect, this happen when printing <a href="https://www.thingiverse.com/thing:53451" rel="nofollow noreferrer">gear bearing</a>.</p>
<ul>
<li><p>I have checked Y-axis ball bearing, motor, tension belt and  I have replaced my 6 mm glass with 1 mm without any difference in shift.</p>
</li>
<li><p>I have once make it work, but I don't why or how (I have lowered speed to 50 and did some random things).</p>
</li>
<li><p>I have printed from Pronterface and when I pause it, then home Y, the skipping in Y is corrected.</p>
</li>
<li><p>If I drive my X/Y-axis with no microstepping, then the skipping is much larger.</p>
</li>
<li><p>I only use Slic3r for G-code generation.</p>
</li>
</ul>
<p><a href="https://i.stack.imgur.com/uNGn5.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/uNGn5.jpg" alt="with no micro stepping" /></a></p>
<p><a href="https://i.stack.imgur.com/kFu7S.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/kFu7S.jpg" alt="with 32 micro stepping" /></a></p>
<p><a href="https://i.stack.imgur.com/uu8zT.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/uu8zT.jpg" alt="with 32 micro stepping" /></a>
<a href="https://i.stack.imgur.com/c7g52.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/c7g52.jpg" alt="with 32 micro stepping" /></a>
<a href="https://i.stack.imgur.com/0G0dq.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/0G0dq.jpg" alt="with 32 micro stepping" /></a>
question:</p>
<ul>
<li><p>What is the cause for that skipping?</p>
</li>
<li><p>If there is more than one possibility, how could I check them separately?</p>
</li>
<li><p>I have changed my Y-axis motor with no change.</p>
</li>
<li><p>I have swapped X&amp;Y connections with no change - still Y skips.</p>
</li>
<li><p>I have lowered jerk and max. speed and it prints gear bearing well and it is spinning, but when I tried to print spiral vase Y motor skipped.</p>
</li>
</ul>

[{'answer_id': 4874, 'author': 'tjb1', 'author_id': 233, 'author_profile': 'https://3dprinting.stackexchange.com/users/233', 'pm_score': 3, 'selected': False, 'text': '<ul>\n<li><p>Weld the fragment to the beginning of a new spool and use it that\nway.  <a href="http://www.i3dinno.com/easywelder-p186486.html" rel="noreferrer">Most are made from metal</a> so they aren\'t that easy to make\nat home.  Here is another <a href="https://3dprinting.stackexchange.com/questions/1345/how-to-connect-filament-end-to-end">answer</a> that lists other methods to\nweld filament including using heat shrink tubing.</p></li>\n<li><p>As you mentioned, you can use it for friction welding.</p></li>\n<li><p>Use it for pin/studs/rivets/hinges in prints.</p></li>\n<li><p>Throw it away.  1.75mm * 1Kg is about 330m of filament, 3mm * 1Kg is\nabout 110m of filament.  The leftover isn\'t worth much when you\nconsider how much is on a spool.</p></li>\n</ul>\n'}, {'answer_id': 4884, 'author': 'R3D34THR4Y', 'author_id': 802, 'author_profile': 'https://3dprinting.stackexchange.com/users/802', 'pm_score': 4, 'selected': True, 'text': '<p>The welding option is only appropriate if you have the tool needed for it, the lighter welding is really hard to do and if your printer allows it you could just watch for the moment the spool runs out and push the new filament as the last of the previous one gets extruded, that\'s what I used to do on my bowden extruder reprap and apart from a really negligible retraction problem on one layer it just works</p>\n\n<p>Or you could go the cool way:</p>\n\n<ul>\n<li>Use the last of the filament for friction/iron welding to fix or glue 3D printed parts together</li>\n<li>Use it as regular filament with a 3D printer pen to fix 3D printed parts</li>\n<li>"Use it for pin/studs/rivets/hinges in prints." as tjb1 said</li>\n<li>Stock it with your failed/ waste 3D printed parts and use them in a recyclebot later to make new filament or simply melt it in an oven to make plastic boards/injection molding material</li>\n<li>Throw it away but that would be a waste over time</li>\n</ul>\n'}]
['https://3dprinting.stackexchange.com/questions/4876', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/8502/']