<p>I literally just started OpenSCAD today, so please take it easy on me, but is shell scripting possible with OpenSCAD? as in, to write a script in the OpenSCAD syntax, and have it output images, or animations? with or without having to render the image.</p>
<p>I've been reading the man pages, and I'm not sure if that can be done.</p>

[{'answer_id': 18536, 'author': 'Perry Webb', 'author_id': 15075, 'author_profile': 'https://3dprinting.stackexchange.com/users/15075', 'pm_score': 0, 'selected': False, 'text': '<p>Try setting the z-seam to <em>random</em> in your slicer.  In Slic3r it is <em>Seam position</em> under <em>Advanced</em> near the bottom of the <em>Layer and perimeters</em> page of the <em>Print Settings</em>.</p>\n'}, {'answer_id': 18724, 'author': 'cmm', 'author_id': 2082, 'author_profile': 'https://3dprinting.stackexchange.com/users/2082', 'pm_score': 2, 'selected': False, 'text': "<p>The horizontal bands are 5mm apart, which is a common pitch for the screws often used for the Z axis.</p>\n<p>I would look for something that binds, moves, slips, or touches once per screw revolution.  The movement repeats along the screw, so if it is a screw defect I would look for a scratch or bump that affects the screw along its axis.</p>\n<p>If you don't see that, check for how the screw is constrained at both ends.  If they are loose constraints, does the screw wiggle while it is turning?</p>\n<p>Move the nut to one extreme and rotate the screw.  Does it appear to have any bend?  Even a small degree of bending that doesn't bind the axis can add a small load to the drive.</p>\n<p>The Z-azis error you are looking for is subtle.  It is probably 10% (or less) of the layer height.</p>\n"}]
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