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Support for the quite nice RAMPS Electronics. See also http://reprap.org/wiki/RAMPS.
Re: Easy to build linear stages - 14 years ago
Hi Demented, look on the linked images and files in - here i described the tripod-system and linked some infos in my answer to Zach, where you have some background ... In my concept the three linear stages aren't in a plane as usual, but parallel, so i have a more cylindrical defined working area - here i can perform a straight Z-movement with moving all three axis synchrone. The thin rods bby VDX - Mechanics
Re: Artifical Muscles - 14 years ago
Hi zzorn, ... the simplest moving structure, which can be build by 3D-fabbing, is a pneumatic or hydraulic setup from a highly elastic resin. Image a 'finger' from elastic silicone with some capilaries in the outer area: - if i apply pressure to a capilary on one side (and mabe vacuum to the corresponding one on the other side), then the finger would bend away from the pressurized side. Combinby VDX - General
Re: Easy to build linear stages - 14 years ago
... here is my idea for a tripod-setup with the 'Easy to build linear stages' and the self-assembling magnetic joints from . The green parts could be entirely made from plastics (reprapped, molded or milled) or from aluminium, the spheres are my joint-magnets and the linear stages from the previous post ... The transparent insert is a displacement-sample of the toolhead, to demonstarte the plaby VDX - Mechanics
Re: Cartesian Platform Built From Old Flat-Bed Scanners? - 14 years ago
Hi mimarob, ... you must have a plain and stiff table under your object, so the most weigt is in the surrounding hardware, not the objects himself ... I'm on prototyping different approaches with a diode-laser-fiber in the head, here the moving mass is so small, that a normal plotter wouldn't sense the difference to a pen ... Viktorby VDX - General
Easy to build linear stages - 14 years ago
Hi all, ... i tried an idea for simply assemble of small motorized linear stages for a noncartesic micro-reprap and found a good intro - this should be working with bigger and longer linear drives too. As the threaded rod has the same diameter, as the motor-shaft, i could use short pieces of pneumatic tubes (elastic and stiff in the same time) as couplings. The rods i found in our 'Bauhaus'-toby VDX - Mechanics
Re: Extruder Cleanup Options - 14 years ago
Hi SOI, ... ther is the fair possibility, that the extruded strings and droplets would stick to the knife and hang around, so they could kontaminate the building area, so a cleaner beside is safer. I thought about a kind of revolver or endless ribbon, but it's the same, loose particles can fall down and stick to the actual slice ... Viktorby VDX - Mechanics
Re: Powder support - 14 years ago
Hi Forrest, ... yes, some companies use paper-LOM until now for lost-casting-forms or large-scaling prototypes of combustion-engines, very big hardware or so ... In 1993-94 i designed and build two 2D-CO2-Laserplotters (with a 5-Watt-RF-CO2-laser) for marking and cutting of plastic-sheets -- for the possibility of 3D-processing or marking of very high parts i made it so, that the base-plate couby VDX - Mechanics
Re: Powder support - 14 years ago
Hi Samuel, ... if you want a high accuracy, e.g. 0,1 mm per slice, then you have to process 10 slices per millimeter or 100 slices per centimeter. With an even as big accuracy and activating/melting every pixel of the body it can last many minutes per slice, so a 'normal' part like a gear with some centimeters in square can consume hours for building, dependant of the 'pixel-processing' speed .by VDX - Mechanics
Re: Cookie extruder - 14 years ago
... i looked in a local toolstore for fast hardening pastes and found some 1K- and 2K-types from 'Fischer' for fixing bolts in walls, which harden temperature-forced in some minutes to a extreme durable solid ... So it could be interesting testing with outputting a single sheet, pause the reprap, then heat the sheet with a thermo-radiator until hardening (or bake the cookie sheet-wise ) and theby VDX - Reprappers
Re: Salvaging parts - 14 years ago
Hi moonspud, ... i think it's needed only for the Z-axis to adjusting the extruder and manually turn the axis, until the extruder-tip is in the right plane ... With the motor parallel by the rod you can make the same thing with a knob on the end of the rod too (if the motor isn't to strong). Or you insert a freerun(?) ... Viktorby VDX - Reprappers
Re: Salvaging parts - 14 years ago
... best workaround to avoid a dual-shaft-motor would be to set the motor beside the (then longer) rod and drive the rod over a tooth-belt. Then the motor can be smaller, coarser and weaker - with the right ratio of the gears i can make the wished power-translation ... Viktorby VDX - Reprappers
Re: Open Source, self-replication, and general project orientation (WAS Re: RepRap or conventional manufacturing cheaper?) - 14 years ago
Hi Sean, ... it seems, i misinterpreted a second time Then a bit more explaining: - The white big 'buckles' at the very left is a 'normal' child-seat-design, but made from stark with cyanacrylate for elasticity-tests. - The red 'buckles' (or clamp?) beside is a generic sample/giveaway from DimensionPrinting made in red ABS, i received as test for accuracy and stability, it was made on an Alpby VDX - General
Re: Another noncartesic, but very simple 2-axis-positioner ... - 14 years ago
Hi all, ... on sunday i played around with my children and made a second try for a pantograph-sample (see the images) Here you can see an original scaleable oldstyle-2D-pantograph and my 3-dimensional analogon - if i lever the outer pin, the inner pin would go up in the same manner, but scaled down (here nearly 4:1) too! You may notice, that my sample is overdefined, as it has two arms, but wby VDX - General
Re: Selective Inhibition of Sintering - 14 years ago
Hi SOI, ... thanks! It's the same idea and some other hacks and hints - i'l read through the infos and make a try, maybe with other inkjet-vendors too ... Viktorby VDX - General
Re: Open Source, self-replication, and general project orientation (WAS Re: RepRap or conventional manufacturing cheaper?) - 14 years ago
Hi Sean, ... sorry, i had to look in my dictionary, to sort it out ... The 'buckles' are my designs and prototypes of micro-grippers and tool-tips for microassembly, but you can find similar designs from some german universities too - it's a generic 'parallel-kinematic'-structure and i was in cooperation with some groups, but the basics are much older, so it's not my personal invention The clby VDX - General
Re: Open Source, self-replication, and general project orientation (WAS Re: RepRap or conventional manufacturing cheaper?) - 14 years ago
Hi Sean, ... call me Viktor, it's more comfortable for me If you meant my avatar-image, then yes, i created some 3D-objects and scenes for fair-presentations and articles. It's no real problem for me, only some time-consumption, to create virtual scenes with available or selfmade 3D-objects and output them in photorealistic iamges or animate them and make small clips - there are some open-souby VDX - General
Re: BOM printed part - how do I get them? - 14 years ago
Hi Thomas, ... could it be, that it's an dot/comma-reading - e.g. $28,000 for 28 US-Dollars instead of $28.000,00? When i order small parts, then it's mostly in the range of 50 to some hundred Euros, dependant of height and inner complexity ... Viktorby VDX - Reprappers
Re: Selective Inhibition of Sintering - 14 years ago
Hi deane, ... sounds great! A new 3D-method for testing with - maybe someone in USA can send me this book ( ) about selfmade inkjet-printing? Here in germany the import seems to be very complex and expensive. Viktorby VDX - General
Re: Open Source, self-replication, and general project orientation (WAS Re: RepRap or conventional manufacturing cheaper?) - 14 years ago
Hi Russ, ... actually the reprap is more like a toy for a hobyist, but in near future it will outrun most other manufacturing systems, as it's evolving in an exponential growth-curve! In 1986 i bought me an 3D-mill and because of lack for appropriate software for my AtariST i had to write my own 2,5D-CAD and the drivers for the CNC too (i have it running until now on an old ST, so here is a posby VDX - General
Re: Repository of mechanics and technical samples - 14 years ago
Hi Toby, ... you have a line, but the stepsizes along the line follows a sine-function, so you have similar recalculations, as with my tripod-systems ... Look at my posts about the tripods ( , and ), especially at the images - here the moving structures didn't have friction or feeding. All stiffness is in the bars and the hinges or magnetic spheres are absolute precise, so this apparatus caby VDX - General
Re: Open Source, self-replication, and general project orientation (WAS Re: RepRap or conventional manufacturing cheaper?) - 14 years ago
Hi Forrest, Forrest Higgs Wrote: ------------------------------------------------------- > Mind, to the best of my knowledge none of the > commercial firms making 3D printers are trying to > do FDM at room temperature. ... as i know, work most other 3D-printers at room-temp, but not with FDM: - Z-Print prints thinned cyanacrylate from an inkjet on a powder-surface - Objet prints smallby VDX - General
Re: Open Source, self-replication, and general project orientation (WAS Re: RepRap or conventional manufacturing cheaper?) - 14 years ago
... most of you are focussed on extruding melted plastics, as some comercial 3D-printers do, but there's much more possible, if you let them some time and seed helpful hints In the image you can see some of my 3D-manufactured parts over the last years. - In the foreground there are milled mini- and micro-parts, i realized on 'low-cost' 3D-mills from ISEL (the first one at 1986 for 2500 Deutschby VDX - General
Re: Another 3 Axis Position System for a RepStrap - 14 years ago
Hi William, ... i fixed the bearings with cyanacrylat on the rods and in the mountings. If i want a better stability, then most with pressing small dots in the aluminium around the bearings, so they will be compressed tightly ... Viktorby VDX - General
Re: Another 3 Axis Position System for a RepStrap - 14 years ago
... here i have some images from another 2-axis-positioner with a flatbed-structure and relative simply driving and assembly ... Viktorby VDX - General
Re: BOM printed part - how do I get them? - 14 years ago
Hi Ian, ... if you want clear parts in your extruder, and you can't reprap them, then it could be made through inserting of prepared clear plastic- or glass-parts in the molded or reprapped parts. Simply insert a glassplate as window or a tube in the extruder-feeding with glue ... In a more sophisticated manner the glass-parts can be inserted while the reprapping, then the extruder can over-moby VDX - Reprappers
Re: BOM printed part - how do I get them? - 14 years ago
Hi Ian, > ... and intend the actual extruder body to be clear PU to allow a better idea of > whats happening inside but this needs a really > well prepared master to mould off and the RP parts > require quite a lot of finishing. what's with using glass for better visibility? That should be heatresistant and not so expensive with standard quartz-glass-tubes ... Viktorby VDX - Reprappers
Re: LLDPE - 14 years ago
Hi Richard, ... no, the only molding plastic i used until now, was my glue-stick ... Actually i'm on dispensing of pastes (glass- and gold-powder in dexpanthenol) at room-temp and then drying, sintering and melting the paste to solid with a diode-laser of maybe 6Watts output-power. The amount is not so big, i have to coat an area of 150x300 microns, so it's not the best way to reprapping ...by VDX - General
Re: LLDPE - 14 years ago
Hi Richard, ... maybe this source ( ) is a usefull hint? Viktorby VDX - General
Re: Another 3 Axis Position System for a RepStrap - 14 years ago
Hi Demented, ... spherical neodymium-magnets with 19 mm diameter are strong enough - i buy them here: For not so exact joints you can use normal ball-joints, they are often used in vibrating machines, can be bought in normal hardware-shops and the counter-glidings are from sintered metall or plastic ... Viktorby VDX - General
Re: Open Source, self-replication, and general project orientation (WAS Re: RepRap or conventional manufacturing cheaper?) - 14 years ago
Hi Damien, ... actually we live in a market-driven society, so money rulez ... If through technical, ideological an social evolution a broader self-reprapping basis would be seeded, then the market-structures would be massively changed: - all material parts and usefull hardware, which the people build at home or in local community-fabbing-centres goes away from the normal building-selling-reselby VDX - General