<p>I am printing ABS in an enclosure and most of the prints have worked out well with minor tweaking. However, the top layer always seems to split or skip a step (not sure which).</p>
<p><a href="https://i.stack.imgur.com/ZtGE7.jpg" rel="nofollow noreferrer" title="Split top layer"><img src="https://i.stack.imgur.com/ZtGE7.jpg" alt="Split top layer" title="Split top layer" /></a></p>
<p><a href="https://i.stack.imgur.com/aXANy.jpg" rel="nofollow noreferrer" title="Layer was peeled of on previous prints"><img src="https://i.stack.imgur.com/aXANy.jpg" alt="Layer was peeled of on previous prints" title="Layer was peeled of on previous prints" /></a></p>
<p>The cube is sliced in Ultimaker Cura 4.3.0 with 0.2 mm layer height, 0.4 mm nozzle, 80 °C bed on lexan and a 235 °C hotend.</p>
<p>The G-code to the calibration cube/chep's calibration cube is attached: <a href="https://drive.google.com/file/d/1GekxfKeUgv337_r0DeJ6_2JTWV_fT1_R/view?usp=sharing" rel="nofollow noreferrer"><code>PI3XL_CHEPCalibrationCube.gcode</code></a>.</p>
<p>While I'm on the subject of slicing and calibration my calibration angle is coming out as before in Simplify3D, this time the layers look great but the onion skinning within the print itself so I could actually separate the calibration angle like an onion.</p>

[{'answer_id': 15991, 'author': 'ninja20', 'author_id': 27605, 'author_profile': 'https://3dprinting.stackexchange.com/users/27605', 'pm_score': 0, 'selected': False, 'text': "<p>Personally, I have dealt with this problem myself! I messed around with the slicer a little bit, and I found that if you make the print layer height 0.15 or 0.10\xa0mm, it will be better. The image you attached looks as though the printer was splitting a step and only printing that part. I can't think of a reason why it would do that. I also can't find anything online, so I would just play with the print settings or change the layer height until it comes out how you want it.</p>\n"}, {'answer_id': 16410, 'author': 'Rob Lent', 'author_id': 28638, 'author_profile': 'https://3dprinting.stackexchange.com/users/28638', 'pm_score': 1, 'selected': False, 'text': "<p>Since it happens in the same place each time, it's either G-code or mechanical. I've seen things like this happen with dirty gantries, or a dirty Z-axis guide.</p>\n<p>If it's not mechanical, there may be something in the G-code that causes it, such as too many retractions in one area, or similar.</p>\n"}]
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