Dear forum members, At the moment I'm building the dibond kit. I've completed the first section by building the frame. I've made shure that all the white fixing blocks were flush with a flat surface, but now the frame is assembled I've noticed a small space between the "inner corners" of the gantry and the bottom plate (circled red in the attached picture). This gap is about 0.5 mm or so on each inner side. Is this tolerable? I've noticed that when I press on the underside of the bottom plate that the gap is reduced so maybe the bottom plate isn't exactly flat and is causing this. https://reprap.org/forum/read.php?292,246396,246396#msg-246396 Fri, 16 Oct 2026 23:22:08 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?292,246396,246727#msg-246727 https://reprap.org/forum/read.php?292,246396,246727#msg-246727
Thanks]]> Nilez Mendel90 Thu, 19 Sep 2013 05:31:08 -0400 https://reprap.org/forum/read.php?292,246396,246606#msg-246606 https://reprap.org/forum/read.php?292,246396,246606#msg-246606 Nilez Mendel90 Wed, 18 Sep 2013 18:50:38 -0400 https://reprap.org/forum/read.php?292,246396,246603#msg-246603 https://reprap.org/forum/read.php?292,246396,246603#msg-246603
There is no reason to use new nylocs. They do have less grip when re-used but they still have plenty for this application when used multiple times. They only have to be tight enough to not rotate due to vibration.]]> nophead Mendel90 Wed, 18 Sep 2013 18:39:16 -0400 https://reprap.org/forum/read.php?292,246396,246598#msg-246598 https://reprap.org/forum/read.php?292,246396,246598#msg-246598
Yeah that's what I'm seeing right now. Maybe I should disassemble the frame completely and do it again. Should I use new nylock nuts if I do? I have those at home.]]> Nilez Mendel90 Wed, 18 Sep 2013 18:15:25 -0400 https://reprap.org/forum/read.php?292,246396,246578#msg-246578 https://reprap.org/forum/read.php?292,246396,246578#msg-246578
Perhaps the stays are fitted too low and are distorting the base? I can't imagine it being that rippled otherwise.]]> nophead Mendel90 Wed, 18 Sep 2013 17:06:19 -0400 https://reprap.org/forum/read.php?292,246396,246499#msg-246499 https://reprap.org/forum/read.php?292,246396,246499#msg-246499 Nilez Mendel90 Wed, 18 Sep 2013 13:27:13 -0400 https://reprap.org/forum/read.php?292,246396,246442#msg-246442 https://reprap.org/forum/read.php?292,246396,246442#msg-246442
Yes the machine needs to stand on a rigid flat surface. It doesn't have to be level but it needs to be a plane. If not the bed will appear to have one corner higher or lower when the other three are level. It can be fixed by putting paper shims under the end of one of the aluminium tubes until all four corners can be levelled.]]> nophead Mendel90 Wed, 18 Sep 2013 10:58:54 -0400 https://reprap.org/forum/read.php?292,246396,246418#msg-246418 https://reprap.org/forum/read.php?292,246396,246418#msg-246418 I think this was caused by the elasticity / limited flatness of the desk, on which I built the M90.

At calibration of the bed with a gauge I can see, that the measured values change up to +/-50µm , when I put things somewhere on the desk.
A sturdy desk with a flat surface seems to be essential for our 3D printers.]]> GerdH Mendel90 Wed, 18 Sep 2013 09:52:32 -0400 https://reprap.org/forum/read.php?292,246396,246396#msg-246396 https://reprap.org/forum/read.php?292,246396,246396#msg-246396
At the moment I'm building the dibond kit. I've completed the first section by building the frame. I've made shure that all the white fixing blocks were flush with a flat surface, but now the frame is assembled I've noticed a small space between the "inner corners" of the gantry and the bottom plate (circled red in the attached picture). This gap is about 0.5 mm or so on each inner side. Is this tolerable? I've noticed that when I press on the underside of the bottom plate that the gap is reduced so maybe the bottom plate isn't exactly flat and is causing this.]]> Nilez Mendel90 Wed, 18 Sep 2013 08:58:46 -0400