Screw threaded telescopic platform (40mm,7 Segments)

thingiverse

Screw threaded telescopic platform, 40mm deep, 7 segment version. Note: I haven't had a chance to test print this version yet, and probably won't for a few weeks. Also, for this 7 segment version the resolution of the 3D model has been reduced as the 6 segment version was hitting the maximum size my computer's memory can cope with which massively extends the time taken to generate the STL files. On this model the spaces between adjacent vertices in the mesh will be about 1.5 times larger than those on all the models previously posted with 6 or fewer segments. This may have an impact on the appropriate clearance (see later in this description) to use when printing. This version is 40mm tall when fully closed and ~200mm tall when fully unscrewed. This object is a concentric series of threaded rings, each captive within the next ring out. The rings can be screwed up or down between two end stops positioned such that all of the rings, when screwed down, line up with each other to form a disk, or screwed up so that each extends above the ring directly outside of it to form a taller, cone-like structure. Because these rings need to be fully captive 3D printing offers the easiest approach to creating this type of structure as all of the rings can be created at the same time in their final position, which avoids having to fit/attach one of the end-stops following creation as separate pieces with subsequent assembly. Note: The 3D models are set-up to print with the upper surface flat on the print bed. This gives a better surface for adhesion but should be remembered if it becomes necessary to apply an force to free up the rings; the rings screw out of the face that was printed downwards. The point of this is to create an object that can be used support things in the way that I do, and hopefully you will find it useful too. It would generally be advisable to initially print the 4 segment example of the smaller version of this object to find out which value of clearance works with your printer prior to trying to crate a larger version as that will minimise the waste plastic that will result from failed prints. The thread faces overhang and it is generally better to print overhangs with low layer heights. I have been printing these with a 0.1mm layer height. Other details from the file names are, "S" is followed by the number of segments, and "H" is followed by the number of millimetres that represent the height of the base units. I have previously posted optional end cap models for these 40mm versions. They are designed to press-fit together and into the ring structures and give a flatter upper surface to the central ring. Related Items Screw threaded telescopic platform (20mm, 4 and 5 segment versions) Screw threaded telescopic platform (30mm, 5 segment version) Screw threaded telescopic platform (30mm, 6 segment version) Screw threaded telescopic platform (40mm, 5 segment version) Screw threaded telescopic platform (40mm, 6 segment version) Update (22nd September 2019) I received a comment from th008 suggesting that these would be easier to print if the clearance between the rings was larger where the form contacts the build plate. This would avoid any 'elephants foot' effect from gluing the adjacent rings together and make them easier to print. It took some thought to work out how to do that without having to re-do the design from the start, but I figured that out and have now made that change. Specifically, where the form contacts the print bed the clearances between the rings is not 0.4mm wider, with that extra clearance tapering back to the normal profile within the first 2.5 mm in height. This change did indeed make these much easier to print reliably.