X Axis 8mm Brass Nut
Posted by liquidnyquiz
|
X Axis 8mm Brass Nut July 11, 2014 09:49PM |
Registered: 10 years ago Posts: 17 |
|
Re: X Axis 8mm Brass Nut July 12, 2014 02:42PM |
Admin Registered: 17 years ago Posts: 7,879 |
The nut fits in the top of the end. The hole at the bottom is 1mm bigger to allow it to pass through easily.
[www.hydraraptor.blogspot.com]
[www.hydraraptor.blogspot.com]
|
Re: X Axis 8mm Brass Nut July 13, 2014 12:00AM |
Registered: 10 years ago Posts: 17 |
|
Re: X Axis 8mm Brass Nut July 13, 2014 04:30AM |
Admin Registered: 17 years ago Posts: 7,879 |
Quote
nophead
The nut fits in the top of the end. The hole at the bottom is 1mm bigger to allow it to pass through easily.
From [hydraraptor.blogspot.co.uk]
Quote
The nut trap for the lead screw is now at the top (don't be fooled by the hexagonal hole at the bottom, that is just clearance to allow the nut to be fitted to the leadscrew first). This greatly increases the distance of the nut from the Z coupling when the Z axis is at the bottom. When the nut was at the bottom it got to within about 10mm so any eccentricity was magnified by about 20 at the top of the leadscrew.
Because holes can't be printed in mid air there are one layer thick support membranes at the bottom and the top of the nut trap. This creates a completely enclosed void which revealed a bug in OpenScad. It generates an STL with the internal faces facing the wrong way, i.e. outwards instead of inwards. Fortunately Skeinforge does not care and slices it correctly but Slic3r doesn't.
[www.hydraraptor.blogspot.com]
|
Re: X Axis 8mm Brass Nut July 13, 2014 08:52PM |
Registered: 10 years ago Posts: 17 |
|
Re: X Axis 8mm Brass Nut July 14, 2014 07:28AM |
Admin Registered: 17 years ago Posts: 7,879 |
The nut fits in the hexagonal nut trap at the top so it can't spin.
There are single layer support membranes above and below the nut trap that have to be cut out with a knife. Due to the bug in OpenScad if you slice it with anything other than skeinforge the nut trap gets filled in solid and the part is useless.
[www.hydraraptor.blogspot.com]
There are single layer support membranes above and below the nut trap that have to be cut out with a knife. Due to the bug in OpenScad if you slice it with anything other than skeinforge the nut trap gets filled in solid and the part is useless.
[www.hydraraptor.blogspot.com]
|
Re: X Axis 8mm Brass Nut July 14, 2014 07:35AM |
Registered: 10 years ago Posts: 17 |
|
Re: X Axis 8mm Brass Nut July 15, 2014 01:17PM |
Registered: 11 years ago Posts: 8 |
Wow I just started googling "brass nut mendel90" because I was trying to figure out if the brass nut was somehow bigger than 13mm wide and I just couldn't source the right piece. Well it turns out I also sliced my parts with slic3r!
Guess I have to reprint 4 parts now (I was the majority way done with 2 printers), but good to know where my problem was!
Guess I have to reprint 4 parts now (I was the majority way done with 2 printers), but good to know where my problem was!
|
Re: X Axis 8mm Brass Nut August 09, 2014 07:21PM |
Registered: 12 years ago Posts: 88 |
|
Re: X Axis 8mm Brass Nut August 10, 2014 09:43AM |
Admin Registered: 17 years ago Posts: 7,879 |
Yes I think Cura gets it right, at least the old version I have seems to.
[www.hydraraptor.blogspot.com]
[www.hydraraptor.blogspot.com]
|
Re: X Axis 8mm Brass Nut August 10, 2014 04:11PM |
Registered: 12 years ago Posts: 88 |
|
Re: X Axis 8mm Brass Nut August 10, 2014 06:29PM |
Admin Registered: 17 years ago Posts: 7,879 |
|
Re: X Axis 8mm Brass Nut August 12, 2014 01:02PM |
Registered: 12 years ago Posts: 88 |
|
Re: X Axis 8mm Brass Nut August 12, 2014 03:48PM |
Admin Registered: 17 years ago Posts: 7,879 |
Yes, I sponsored the fix but it hasn't made it to a release yet. You can probably find it in a development snapshot. However, there are lots of other changes that might affect the geometry produced, in particular the 2D CGAL operations have been replaced.
[www.hydraraptor.blogspot.com]
[www.hydraraptor.blogspot.com]
|
Re: X Axis 8mm Brass Nut August 16, 2014 03:41PM |
Registered: 12 years ago Posts: 88 |
As always thanks for your comments and assistance.
To close this thread out, Cura through version 13.11 (and possibly 13.12, but toolpath rendering crashes in that version for some reason) slices the part properly. Versions starting with 14.01 do not work.
An interesting side note about slicing your models, which I know are optimized for Skeinforge, is that both Slic3r and Cura need to be scaled 3-5% larger.
For those reading this thread, please take advantage of Nophead's cal.stl to verify scaling before going all out and printing a complete parts set.
To close this thread out, Cura through version 13.11 (and possibly 13.12, but toolpath rendering crashes in that version for some reason) slices the part properly. Versions starting with 14.01 do not work.
An interesting side note about slicing your models, which I know are optimized for Skeinforge, is that both Slic3r and Cura need to be scaled 3-5% larger.
For those reading this thread, please take advantage of Nophead's cal.stl to verify scaling before going all out and printing a complete parts set.
|
Re: X Axis 8mm Brass Nut August 17, 2014 12:17AM |
Registered: 9 years ago Posts: 7 |
Sorry, only registered users may post in this forum.