Show all posts by user
Support for the quite nice RAMPS Electronics. See also http://reprap.org/wiki/RAMPS.
Re: The sky was grey, the colour of television tuned to a dead channel. - 14 years ago
Hi deadgenome, ... good to know - i'll have a look on this ... Viktorby VDX - RepRap Host
Re: The sky was grey, the colour of television tuned to a dead channel. - 14 years ago
... yeah ... i won't name it. Many years ago i tried to design a scalable virtual constructor-world, where i start with coloured balls resembling single atoms, then stick the balls together in the wished order, a physics-engine adjust the distance and angles to form simple molecules, and so on, and so on ... When the object gets to big or complicated, i would change the dimension or collapse itby VDX - RepRap Host
Re: The sky was grey, the colour of television tuned to a dead channel. - 14 years ago
Hi deadgenome, ... looks very interesting! It seems to have much bigger potential then Blaxxun's first try, but now it has some more competition in virtual- and simworlds. You must have a minimum amount of users and common interest for driving it over a time long enough, so i wish the very best ... Viktorby VDX - RepRap Host
Re: Combination of FDM and milling - 14 years ago
... here i have some samples of 3D-milling with my old CNC-system - the rooster in the images is 70x60x10mm in size, but the millhead can move until 500x500x90mm. Back-side only roughed: Front-side finished: This was a test-output with Cut3D from vectric, but with the basic-software from Isel i'm capable of 3D-constructing and milling with 3 or 4 axes. I think with some experimenting and goby VDX - Shape Deposition Manufacturing Working Group
Re: Home-brewed plastic made from milk ... - 14 years ago
... i think for building big objects with sand/concrete the best way should be to reprap the outer surface of the object with normal plastic in slices of some millimetres or centimetres height, fill the structure completelly with the sand-mixture, let it harden and then process the next slice ontop ... 'Normal' sand-particles are to sharp-edged and rough to go through a dispenser and when mixingby VDX - Polymer Working Group
Re: Building CNC machines from Epoxy+Granite - 14 years ago
Hi Andy, ... it's every type of 2K-epoxy you can find, the people didn't fix on a special type, it's simply the 'glue' ... For the best results you have to mix coarser and finer sand with some sort of cutted fibres (glass, carbon or such) with 6% to 12% of epoxy. The mixture didn't flow, so you have to insert it with some force and compress by vibration to exhaust air-bubbles. Viktorby VDX - Casting and Moldmaking Working Group
Re: G-code (GCODE) interpreter for RepRap - 14 years ago
... i'm repstrapping with a fully functionable CNC-mill too (beside mey experiments with parallel-kinematic-robots). The problem is not the communication to the steppers - here i have an Isel-CNC-controller, which ist driven by the PC with proprietary Isel-NCP-code or common G-code over the serial RS232-port. Many others have other CNC-mills or PCB-routers with DIR/CLK-drivers over parallel porby VDX - RepRap Host
Re: Building CNC machines from Epoxy+Granite - 14 years ago
Hi Andy, ... the images are out from the building process (and this are two different machines) - in the end the complete machine should be embedded in virtual stone ... The framework is made from steel, not from aluminium - the people building this targets mainly rigidity and stiffness, not leightweight systems - so some hundred kilograms per component aren't bad and some complete assembled sby VDX - Casting and Moldmaking Working Group
Re: Printing solar panels and batteries - 14 years ago
Hi Gene Hacker, ... i had run the golem-project nearly two years on my PC in background, but got only the common 'hoppers' and 'sliders', so it seems to be someting limited in evolutional bandwith ... My favorite are the morphing blocks: - it's a very interesting path into the nano-world of fogglets or utility-fog ( ) Another very interesting evolutionary approach are the framsticks - - heby VDX - Let's design something! (I've got an idea ...)
Re: Building CNC machines from Epoxy+Granite - 14 years ago
Hi Sebastien, ... i can post some images, but you have to login to read the posts - it's mainly the Forum "CNC-Ecke" [5128.rapidforum.com] (or www.cncecke.de ) Viktorby VDX - Casting and Moldmaking Working Group
Re: Combination of FDM and milling - 14 years ago
Hi Andy, interesting setup It seems to be really big, so the tubes can bend over the long range - maybe adding more rigidity with diagonal steel-wires would be good. Good luck with Ianus Viktorby VDX - Shape Deposition Manufacturing Working Group
Re: Vigyan Ashram - 14 years ago
Hi Sebastien, ... some years ago a guy at Fraunhofer showed me a similar kind of a 'waving plane'-energy-generator. He set some PZT-foil-elements on a thin sheet of steel (but tis could be a sheet of any other material too) and set it like a flag in the wind. When flapping and oszillating, the bending PZT-elements created sinusoidal high-voltage-peaks. But i think winding some coils and flappby VDX - General
Re: Speed of the Nanotec ST5709S1208-B - 14 years ago
Hi Zach, when calculating my paths or predefining milling parameters i count steps per second with steppers or millimeters per second in general. For the tripod-controlling i have to convert the cartesian defined path (as outputted from the host-software) in short pieces and translate the angular displacement of the both endpoints in stepcounts which the three parallel aligned motors have to ruby VDX - Mechanics
Re: Printing working 3D Body Parts already being done. - 14 years ago
Hi deadgenome, ... the printing of food is my favorite - but when thinking, where to source, then etic points should be discussed ... What's with a 'personal' meat-source? Imagine a 'synthesizer' which you initialize with a small probe of your own cells, which prints steacks and other 'living' food absolutely compatible with your biochemistry is this a sort of cannibalism? I think it's muchby VDX - Tissue Engineering
Re: Building CNC machines from Epoxy+Granite - 14 years ago
Hi Sebastien, in the german CNC-forums they show their selfmade 'stone'-bases and mill-beads and discuss different mixtures and methods of mixing and finishing. The best mixture seems to be small pebbles, coarse sand, fine sand and some glass-dust or cutted glass-fibres with 6% to 10% epoxy. For exctracting air-bubbles you have to compact the mixture with heavy vibrating, but then you have a pby VDX - Casting and Moldmaking Working Group
Re: Printing working 3D Body Parts already being done. - 14 years ago
Hi gene hacker, ... true, my 'heart-beat-powersource' with nano-PZT's is a funny example, but there are some serious developments embedding PZT-actuators into shoe-soles and clothing, so you produce electricity every time you move your arms or walk ... Viktorby VDX - Tissue Engineering
Re: Vigyan Ashram - 14 years ago
Hi Seabstien, ... i've already mentioned building a 'giant' bamboo-tripod as eyecatcher for exhibitions - why not trying to source the reprap-parts from grown hardware too Viktorby VDX - General
Re: Printing working 3D Body Parts already being done. - 14 years ago
... i already see someone printing a compound of heart-cells and piezoelectric micro-particles to form a 'living' powersource, you only have to feed with sugar and oxgene Viktorby VDX - Tissue Engineering
Re: Speed of the Nanotec ST5709S1208-B - 14 years ago
... an update: i calculated and tested with my CNC-mill - with 8kHz in freerun i can move the CNC-axes with up to 100mm/s, what's very fast, because i have some kilograms to move! The motors are turning max. with 1200rpm (or 20rps) with 5mm translation per turn and i have a positioning accuracy of 12,5 microns per step (with halfstepping 400 steps/turn). When milling i reduce the speed dependanby VDX - Mechanics
Re: Speed of the Nanotec ST5709S1208-B - 14 years ago
Hi Barry and Zach, it's the step-frequency what counts - 'oldstyle' stepper IC's like the 3479P drives normal motors with fullstep at 500 to 700Hz with max. 700mA current. My full/halfstep-controllers from ISEL are capable of running until 10000Hz, but my motors in the CNC stalls when over 8000Hz, but with microstepping i'm able to drive them over 10000hz too ... It's depending from the step-aby VDX - Mechanics
Re: UV curable resins - 14 years ago
Hi Andy, aka47 Wrote: ------------------------------------------------------- > ... > I don't know if a standard LuLock to tube adapter > is available or makable but this would allow > interchangeable tips and diameters for nozzle. > ... You can buy LuerLock-adapters with metric- or inch-threading - the cheaper ones are from plastic, so a bulk order should work fine ... Viktorby VDX - Polymer Working Group
Re: Home-brewed plastic made from milk ... - 14 years ago
Hi Fernando, ... it's not so hot, only a 'sideway' i'll try when finding time after getting the other tasks working. Actually i'm busy with paste-soldering for temperatures between 300by VDX - Polymer Working Group
Re: RepRap machine for UV-curable resins - 14 years ago
Hi Fernando, ... it seems i have all the needed parts without not the resins With my old CNC-system i already have a very good cartesian robot, capable of highspeed-moving with 12,5 microns accuracy in the area of 500x500x100 mm. For the UV-sources i found an Eprom-eraser with a second lamp and from my PCB-etching-era i have a big doublesided UV-curer with 10 bigger UV-tubes, so i'm able to cby VDX - Polymer Working Group
Re: Home-brewed plastic made from milk ... - 14 years ago
Hi Fernando, ... in my second post i mentioned reusing predried caseine for glue or paste: " ... The second experiment was the 'caseine-glue' - here i mixed the rest of the curd with some water and baking powder, so it changed to a fluid paste, which is usefull as glue and is dispensable through syringes. ... " With the right mixture you have a good sticking/adhesive paste, but when drying wby VDX - Polymer Working Group
Re: frikkin' laser beams - 14 years ago
... for low-energy-CO2-lasers you can use simple metallized glass-mirrors (e.g. salvaged from scanners) in the optical setup. The only noncommon part is the focussing lens - here i used Germanium-lenses or from ZnSn. ZnSn-lenses are better, as you can feed a pilot-beam from a laserpointer throug, Germanium didn't transmit visible light ... I used 1,5Watt-CW-CO2-lasers with open glasstubes andby VDX - Laser Cutter Working Group
Re: Combination of FDM and milling - 14 years ago
Hi Chris, ... it's a bit tricky with hollow LOM-objects - when crisscrossing the inner volume you can crash and extract the inner bits. Another way is to separate hollow objects and glueing them together after cleaning. The main advantage of the LOM-fabbing is the possibility of building overhangs and hollow structures without a second support-material, as the sheets are completelly self-suppoby VDX - Shape Deposition Manufacturing Working Group
Re: Combination of FDM and milling - 14 years ago
Hi Chris, here a sketch of some embedded objects in the fabbed cylinder: The software have to calculate the object-volume fitting the actual sheet as in the plane slice'n'dice-approach, but in a cylindrical plane instead of a horizontal one. The surface-accuracy of the objects is dependant of the sheet-thickness, so 0,1mm (normal paper) or thinner would be fine. All the sheet-area not covereby VDX - Shape Deposition Manufacturing Working Group
Re: Combination of FDM and milling - 14 years ago
Hi nophead, ... correct, but for LOM-fabbing i'm planning a "fast-LOM"-setup, where i would in a continuous mode roll a thin sheet of material (paper, plastic, 'green' ceramic, metall with 0,05 to 0,1 mm thickness) onto a cylinder, press/heat/mold the sheet onto and cut the separation- and contourlines with a scanning laser (or slower with a needle or mill). Imagine a roll of paper, transferredby VDX - Shape Deposition Manufacturing Working Group
Re: Extruder Rate (request for crackpot ideas) - 14 years ago
Hi deadgenome, ... the idea isn't so bad - but if your filament is fluid enough, to stick on the surface, it isn't stable enough to hold the tube-form against pressure (it'll blow up or collapse partially), so you can't control the diameter with pressure-changes. I think you should evolve your idea with two different materials - the core is from a stronger and denser material and the hull fromby VDX - General
Re: Combination of FDM and milling - 14 years ago
Hi nophead, ... it's the same for the LOM-approach ( ), where i too have to mill only one sheet per step ... So i'm actually accumulating different ideas, toolheads and software-concepts for my CNC. I hope to show some more interesting tasks during the next months Viktorby VDX - Shape Deposition Manufacturing Working Group