<p>I'm trying to print a cylinder with Flashprint. Problem is, that the .stl file i created (with OpenSCAD) is totally ruined once loaded into Flashprint. With ruined I mean the round outline is now with spikes and steps everywhere. And by loaded I mean directly after loading, not even creating the .gx files. The output of OpenSCAD looks fine, also in other stl viewers I tried.</p>

<p>I figured out the problem occurs more when using certain number of fragments ($fn). If its very small, loading works better. But for numbers that make it acutally look like a round circle (eg 50), Flashprint is unable to load them correctly it seems.</p>

<p>It's obvious that its no slicing or printing problem, but simply a loading one, since the shown object (which does not look any round) also prints the way it is shown in flashprint before slicing.</p>

<p>Does someone know a way to load a cylinder with flashprint correctly, or do I have to switch to different software? I already installed some but am unfamiliar with the printer settings which I do not know in detail. I really though a cylinder should'nt be too complex for any 3D software.</p>

<p>Here is the OpenSCAD Code for Cylinder, just create .stl and load into Flashprint to reproduce the Error:</p>

<pre><code>rotate_extrude($fn=70)
    translate([0, 0])
        square([20,2]);      
</code></pre>

<p>See also this image (tried native cylinder code, problem remains the same however):
<a href="https://i.stack.imgur.com/v6qkG.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/v6qkG.png" alt=""></a></p>

[{'answer_id': 5173, 'author': 'markshancock', 'author_id': 6417, 'author_profile': 'https://3dprinting.stackexchange.com/users/6417', 'pm_score': 3, 'selected': True, 'text': "<p>From an electrical standpoint, a two-phase stepper motors (what most 3D printers use) works the same backwards and forwards, the phase just reverses.  If you are stalling on only one direction, I would look to see if you have a mechanical bind in that direction.  Generally a wiring issue will cause the motor to either not run at all or to run in the wrong direction.</p>\n\n<p>A few things you can check:</p>\n\n<ol>\n<li>Decouple the motors from their mechanical load and confirm that they all run correctly when they aren't driving a load.  If you can't do that, disconnect them all then connect a spare motor to each cable one-at-a-time.</li>\n<li>Turn each of the axis with your hand and make sure it turns smoothly throughout the entire range in both directions.  Note: Some times a binding issue is acceleration related - a loose frame or coupling can cause this.</li>\n<li>Monitor the supply voltage to make sure that one of the motors is not pulling the supply down causing all the others to stall.</li>\n</ol>\n"}, {'answer_id': 8277, 'author': 'silver', 'author_id': 12950, 'author_profile': 'https://3dprinting.stackexchange.com/users/12950', 'pm_score': 1, 'selected': False, 'text': '<p>Sounds like you are configured for NC switches but are using NO switches, causing them to invert their reported state. Issue a <strong>M119</strong> command and see if the endstop statuses are correct when none are triggered.</p>\n'}, {'answer_id': 12231, 'author': 'Bentley', 'author_id': 20465, 'author_profile': 'https://3dprinting.stackexchange.com/users/20465', 'pm_score': 1, 'selected': False, 'text': '<p>Had a similar issue with one of the stepper motors on a Flashforge Creator Pro.</p>\n\n<p>Just finished a print as the head was returning to the home position and sounded like it was jammed up, inspected in jog mode and it would move left but not right then neither direction, disconnected, check for free movement and all was good found this thread and was thinking it might be a bad motor but turned out to be just a bad wire going to the motor.</p>\n'}]
['https://3dprinting.stackexchange.com/questions/5183', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/9499/']