A4 Mendel I've played around with designs for a while and taken them apart again when they were not quite what I wanted. I'm building what I hope will be the final version now. Up in the Alps the temperature can drop a lot and cold draughts can ruin prints. I wanted a slightly larger than the usual 200 x 200 build size. I didn't find an existing design that quite met my particular needs. Last October my prints started warping on my Mendel90 with the colder weather so I built an enclosure to solve that. This design incorporates the enclosure using it to add a bit of stability. Dibond and polycarbonate seemed like the best choices for the basic structure. I strengthened it with openbeam which also makes it easy to alter the placement of parts. s1361.photobucket.com mod_embed_images_loadimage('b1d078c280d8a62ba1485713c64d0f78', '/forum/thumbcache/d1b/e40/402/597/56e/5a6/f69/759/d30/4b6/57_800x400.png', 'http://i1361.photobucket.com/albums/r662/Ralph_Hilton/DSC00182_zps56c877e1.jpg', 'https://reprap.org/forum/addon.php?2,module=embed_images,check_scaling=1,url=http%3A%2F%2Fi1361.photobucket.com%2Falbums%2Fr662%2FRalph_Hilton%2FDSC00182_zps56c877e1.jpg', 'http://s1361.photobucket.com/user/Ralph_Hilton/media/DSC00182_zps56c877e1.jpg.html', 375654, 800, 400, 'Loading image ...', false); I just received the dibond sheets yesterday so it will be a while before it is finished. I have seen a number of printers with the X carriage supported from below with the couplers compressed by the weight. It seemed to me better to support the weight of the carriage, rods etc. from above with the rods in tension rather than compression. I have supported the rods in 608 bearings from above. Wobble can thus be taken up by the couplings. s1361.photobucket.com mod_embed_images_loadimage('9a8c9a228c26e9ffd5cbc8c1ec569a3c', '/forum/thumbcache/576/926/5f5/3cb/c1d/3ce/178/cc1/595/cf7/6f_800x400.png', 'http://i1361.photobucket.com/albums/r662/Ralph_Hilton/DSC00184_zpsc6cf6b80.jpg', 'https://reprap.org/forum/addon.php?2,module=embed_images,check_scaling=1,url=http%3A%2F%2Fi1361.photobucket.com%2Falbums%2Fr662%2FRalph_Hilton%2FDSC00184_zpsc6cf6b80.jpg', 'http://s1361.photobucket.com/user/Ralph_Hilton/media/DSC00184_zpsc6cf6b80.jpg.html', 375654, 800, 400, 'Loading image ...', false); I made the end pieces of the X assembly with a lot of holes for playing with the design of the X motor and idler printed parts. s1361.photobucket.com mod_embed_images_loadimage('7bee1bcd2ab0c9710e7248501f408b2d', '/forum/thumbcache/90b/4ba/2b4/c0a/e29/e6b/afc/880/7c7/02a/8e_800x400.png', 'http://i1361.photobucket.com/albums/r662/Ralph_Hilton/DSC00185_zpsb7809761.jpg', 'https://reprap.org/forum/addon.php?2,module=embed_images,check_scaling=1,url=http%3A%2F%2Fi1361.photobucket.com%2Falbums%2Fr662%2FRalph_Hilton%2FDSC00185_zpsb7809761.jpg', 'http://s1361.photobucket.com/user/Ralph_Hilton/media/DSC00185_zpsb7809761.jpg.html', 375654, 800, 400, 'Loading image ...', false); s1361.photobucket.com mod_embed_images_loadimage('a10c7c736e41d0675f7ae6106b642019', '/forum/thumbcache/87d/da1/edf/d05/ca6/099/17b/67b/07c/cab/bf_800x400.png', 'http://i1361.photobucket.com/albums/r662/Ralph_Hilton/DSC00187_zps8a9a27ca.jpg', 'https://reprap.org/forum/addon.php?2,module=embed_images,check_scaling=1,url=http%3A%2F%2Fi1361.photobucket.com%2Falbums%2Fr662%2FRalph_Hilton%2FDSC00187_zps8a9a27ca.jpg', 'http://s1361.photobucket.com/user/Ralph_Hilton/media/DSC00187_zps8a9a27ca.jpg.html', 375654, 800, 400, 'Loading image ...', false); Please let me know if you see any silly mistakes :-) https://reprap.org/forum/read.php?2,375654,375654#msg-375654 Sat, 15 Aug 2026 02:50:23 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?2,375654,385679#msg-385679 Re: A4 Mendel https://reprap.org/forum/read.php?2,375654,385679#msg-385679 nophead Developers Sun, 20 Jul 2014 16:07:14 -0400 https://reprap.org/forum/read.php?2,375654,385665#msg-385665 Re: A4 Mendel https://reprap.org/forum/read.php?2,375654,385665#msg-385665 Ralph.Hilton Developers Sun, 20 Jul 2014 15:36:08 -0400 https://reprap.org/forum/read.php?2,375654,385420#msg-385420 Re: A4 Mendel https://reprap.org/forum/read.php?2,375654,385420#msg-385420 nophead Developers Sun, 20 Jul 2014 05:01:33 -0400 https://reprap.org/forum/read.php?2,375654,385385#msg-385385 Re: A4 Mendel https://reprap.org/forum/read.php?2,375654,385385#msg-385385
]]> Ralph.Hilton Developers Sun, 20 Jul 2014 00:04:26 -0400 https://reprap.org/forum/read.php?2,375654,380637#msg-380637 Re: A4 Mendel https://reprap.org/forum/read.php?2,375654,380637#msg-380637 Ralph.Hilton Developers Wed, 09 Jul 2014 14:30:25 -0400 https://reprap.org/forum/read.php?2,375654,379122#msg-379122 Re: A4 Mendel https://reprap.org/forum/read.php?2,375654,379122#msg-379122 Paul4865 Developers Sun, 06 Jul 2014 16:30:49 -0400 https://reprap.org/forum/read.php?2,375654,375654#msg-375654 A4 Mendel https://reprap.org/forum/read.php?2,375654,375654#msg-375654 I'm building what I hope will be the final version now. Up in the Alps the temperature can drop a lot and cold draughts can ruin prints.
I wanted a slightly larger than the usual 200 x 200 build size. I didn't find an existing design that quite met my particular needs.
Last October my prints started warping on my Mendel90 with the colder weather so I built an enclosure to solve that.
This design incorporates the enclosure using it to add a bit of stability. Dibond and polycarbonate seemed like the best choices for the basic structure. I strengthened it with openbeam which also makes it easy to alter the placement of parts.

I just received the dibond sheets yesterday so it will be a while before it is finished.
I have seen a number of printers with the X carriage supported from below with the couplers compressed by the weight. It seemed to me better to support the weight of the carriage, rods etc. from above with the rods in tension rather than compression. I have supported the rods in 608 bearings from above. Wobble can thus be taken up by the couplings.

I made the end pieces of the X assembly with a lot of holes for playing with the design of the X motor and idler printed parts.


Please let me know if you see any silly mistakes :-)
]]> Ralph.Hilton Developers Sat, 28 Jun 2014 16:23:15 -0400