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 ...)
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
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
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
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
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
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
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
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
... 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
... 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
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
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
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
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
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
... 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
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
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
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
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
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
Hi all, with my old CNC-mill i want to combine the additive fabbing of a FDM-extruder with the subtractive finishing of a CNC-mill. In a german CNC-forum i found a simple methode for building very accurate housings and fittings - here i have some images ... 1 - build (reprap?) the inner core and finish with a mill: 2 - apply the material for the housing (maybe with the reprap too?): 3 -by VDX - Shape Deposition Manufacturing Working Group
Hi Fernando, ... glad to hear this Then i should search some UV-sources with micro-spots ... Viktorby VDX - Polymer Working Group
Hi Assargadon, look here for a list of types and torques. Viktorby VDX - Russia RepRap User Group
Hi Demented, ... when you didn't find a software-aproach, then you can reconnect the stepper-wires, so it would turn the other way, or simply invert the DIR-pin ... Viktorby VDX - Controllers
Hi servant74, ... i've already tested Cut3D some months ago and think to buy the bundle of VCarvePro+Cut3D. With my CNC-system i have the software IsyCAM 2.0, which is capable of the same output in 3D-milling and can cut plain slices too, but i need cylindrical shaped cut-planes for lathe-LOM. I have the contact-data of the Cut3D-developer - maybe he's willing to cooperate in this, but it's aby VDX - Plastic Extruder Working Group
Hi Assargadon, ... here i have some images (borrowed from a german CNC-forum with login) showing how to adapt steppers to lathe-axes, where the needed 'horsepowers' are much bigger then in your robot: So you could drive your robot even with the small-sized steppers salvaged from old floppy-drives or HD's - but then with some bigger scaling factor for the gears ... Viktorby VDX - Russia RepRap User Group
... sometimes i found milk-powder in the store - it can be dissolved with water for baby-nutrition. With low amounts of water and heating this should give a dispensable paste too ... Maybe this is a cheap and common source for casein-bases or could be otherwise used? What's with mixing milk-powder, starch, water and some additives for better extrudability? Then heating the water out and crackby VDX - Polymer Working Group
... what could help handle different diameters of filamet with only one setup is an entry-sleeve made from a heat-resistant resine. It should be possible to tightening or loosening the entry hole by compressing the resine-tube with a hollow screw, as in some plumbing-devices, where you simply insert the tubes in the resin and compress it until it's tight enough. Then lubricating the resine or fby VDX - Plastic Extruder Working Group