What's going on here? I've got a strange effect happening at the moment with my prints: scaled.IMG_5704.jpg mod_embed_images_loadimage('e667ea7cda064ec75940daae11160345', '/forum/thumbcache/cf9/586/985/a61/a59/91e/3c1/7e2/627/4f3/cf_800x400.png', 'http://systematictechnology.net/wp-content/uploads/2011/11/scaled.IMG_5704.jpg', 'https://reprap.org/forum/addon.php?154,module=embed_images,check_scaling=1,url=http%3A%2F%2Fsystematictechnology.net%2Fwp-content%2Fuploads%2F2011%2F11%2Fscaled.IMG_5704.jpg', '', 105438, 800, 400, 'Loading image ...', false); That's the vertical view of a 'reprap shot glass' The outer shell of the print is not in contact with the inner shell. This artifact seems to be happening in most of my prints, in one form or another. With some, the lower layers are offset up from upper layers. With others, holes aren't symmetrical on both sides of the print. It's just clearest here. For this print, I just used a fresh re-install of SFact, with no setting changes at all. I believe it's not a printing artifact. Vertically, the print comes out beautifully, it's looks like it's getting some strange instructions. Is SF not skeining correctly? scaled.IMG_5703-224x300.jpg mod_embed_images_loadimage('c51ba3b72bc1e39f5feda6cdf333aa2e', '/forum/thumbcache/26b/f4a/825/6bc/e07/a8d/bb6/2ce/5c7/e73/a4_800x400.jpg', 'http://systematictechnology.net/wp-content/uploads/2011/11/scaled.IMG_5703-224x300.jpg', 'https://reprap.org/forum/addon.php?154,module=embed_images,check_scaling=1,url=http%3A%2F%2Fsystematictechnology.net%2Fwp-content%2Fuploads%2F2011%2F11%2Fscaled.IMG_5703-224x300.jpg', '', 105438, 800, 400, 'Loading image ...', false); Any suggestions would be appreciated. https://reprap.org/forum/read.php?154,105438,105438#msg-105438 Tue, 13 Oct 2026 08:31:36 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?154,105438,105819#msg-105819 Re: What's going on here? https://reprap.org/forum/read.php?154,105438,105819#msg-105819
You can get it here:
Gen 6
Non-Gen 6]]> brnrd Skeinforge Sat, 12 Nov 2011 07:00:10 -0500 https://reprap.org/forum/read.php?154,105438,105796#msg-105796 Re: What's going on here? https://reprap.org/forum/read.php?154,105438,105796#msg-105796
I think the wiggles are caused by 'stickiness' of the bushings. Hopefully, they'll go away as the printer wears in, or I'll just change to linear bearings.

I must admit, I haven't heard of the Marlin firmware before, I'll have a look into it.]]> Shibboleth Skeinforge Sat, 12 Nov 2011 00:54:44 -0500 https://reprap.org/forum/read.php?154,105438,105783#msg-105783 Re: What's going on here? https://reprap.org/forum/read.php?154,105438,105783#msg-105783 -------------------------------------------------------
> What feed rate are you using? You should try the
> Marlin firmware. Those wiggles in the loops would
> probably go away if you do.


+1]]> Pointedstick Skeinforge Fri, 11 Nov 2011 20:47:50 -0500 https://reprap.org/forum/read.php?154,105438,105713#msg-105713 Re: What's going on here? https://reprap.org/forum/read.php?154,105438,105713#msg-105713 brnrd Skeinforge Fri, 11 Nov 2011 09:47:08 -0500 https://reprap.org/forum/read.php?154,105438,105676#msg-105676 Re: What's going on here? https://reprap.org/forum/read.php?154,105438,105676#msg-105676


As you can see, this has fixed up the problem 99%Thanks for all the help!
]]> Shibboleth Skeinforge Fri, 11 Nov 2011 03:30:09 -0500 https://reprap.org/forum/read.php?154,105438,105634#msg-105634 Re: What's going on here? https://reprap.org/forum/read.php?154,105438,105634#msg-105634 CeeThreeEs Skeinforge Thu, 10 Nov 2011 16:33:55 -0500 https://reprap.org/forum/read.php?154,105438,105502#msg-105502 Re: What's going on here? https://reprap.org/forum/read.php?154,105438,105502#msg-105502 http://www.flickr.com/groups/3d-print-failures It might help others with the same problem in the future.]]> garyhodgson Skeinforge Thu, 10 Nov 2011 06:46:47 -0500 https://reprap.org/forum/read.php?154,105438,105472#msg-105472 Re: What's going on here? https://reprap.org/forum/read.php?154,105438,105472#msg-105472
Is this a Prusa or a Mendel?]]> nophead Skeinforge Thu, 10 Nov 2011 04:48:02 -0500 https://reprap.org/forum/read.php?154,105438,105463#msg-105463 Re: What's going on here? https://reprap.org/forum/read.php?154,105438,105463#msg-105463


As to the other suggestions:
Missing Teeth - I use Aluminium pulleys.
Loose Belts - Both X and Y makes a nice 'twang' sound when plucked.
Slipping Pulleys - Unlikely. I have flats on my motors, and the grub screws are wound down.

I can't see where the problem is, but it does seem (judging from the screenshot above) that it must be mechanical. Thanks for the suggestions!
]]> Shibboleth Skeinforge Thu, 10 Nov 2011 03:53:49 -0500 https://reprap.org/forum/read.php?154,105438,105448#msg-105448 Re: What's going on here? https://reprap.org/forum/read.php?154,105438,105448#msg-105448 Sublime Skeinforge Thu, 10 Nov 2011 02:59:44 -0500 https://reprap.org/forum/read.php?154,105438,105445#msg-105445 Re: What's going on here? https://reprap.org/forum/read.php?154,105438,105445#msg-105445
Quote
brnd
Have you confirmed that the toolpath generated from the g-code has the same problem before suspecting SF or SFACT?

What he is saying is you should look at the skeinlayer output to see if this is really being set to the printer or if you have some other problem such as loose belts, missing tooth on pulley, loose pulley, or something else mechanical that could cause the problem.]]> rhmorrison Skeinforge Thu, 10 Nov 2011 02:00:29 -0500 https://reprap.org/forum/read.php?154,105438,105443#msg-105443 Re: What's going on here? https://reprap.org/forum/read.php?154,105438,105443#msg-105443 brnrd Skeinforge Thu, 10 Nov 2011 01:41:40 -0500 https://reprap.org/forum/read.php?154,105438,105438#msg-105438 What's going on here? https://reprap.org/forum/read.php?154,105438,105438#msg-105438


That's the vertical view of a 'reprap shot glass' The outer shell of the print is not in contact with the inner shell. This artifact seems to be happening in most of my prints, in one form or another. With some, the lower layers are offset up from upper layers. With others, holes aren't symmetrical on both sides of the print. It's just clearest here.

For this print, I just used a fresh re-install of SFact, with no setting changes at all. I believe it's not a printing artifact.

Vertically, the print comes out beautifully, it's looks like it's getting some strange instructions. Is SF not skeining correctly?



Any suggestions would be appreciated.
]]> Shibboleth Skeinforge Wed, 09 Nov 2011 22:09:25 -0500