Hi Jared, ... the c't-bot-driver-software is open-source in C++ and Java (the linked live-cam-testprogramm is written in Pascal). You can modify the visible area and optical resolution through normal optical lenses. The sensor has 19x19 pixels in grey-scale (6 bpp?), so it's not so much data-transfer - the test-program transfers the live image-data per serial COM, with a bit code-digging you cby VDX - Controllers
... the dispenser-needles are all blunt/perpendicular - you can order them with different lengths or with different bended angles (mostly 45by VDX - Mechanics
... as Globaco didn't have an english catalogue, here is another German/European distributor with similar costs, but an english page: Viktorby VDX - Mechanics
Hi aka47, ... as they sell in bulks, it's some ten to hundred Euros per order (+shipping), but it's relatively cheap (some ten cents) for single needles and syringes ... I developed with pressurized-air-dispensers too - it's easy and fast to dispense with PWM or simple pressure-per-speed-calculations, but not so exact in volume and tray-width, as the viscousity/temperature is a very important pby VDX - Mechanics
Hi aka47, ... here is the link to the needles (and syringes/cartoushes) - go to the 3rd page (marked as page 8) On the bottom of next page you have the colour-tables and hole-diameters in inches and millimeters. They sell in bulks of 50 pcs. Viktor PS: when home, i'll try to find an english catalogue ... Edit: --- and in the meantime you can watch a movie of a "comercial repstrap"by VDX - Mechanics
... if you're interested in a comparison between pure capitalism an an 'free source' alternative, then read the first 2 books of "The Probability Broach" from L. Neil Smith ( ). Here he describes an alternative reality, where you have a complete different market-structure and people have much more prosperity from that ... Viktorby VDX - General
... it should behave in same manor - but the accuracy isn't much better, as ticker latex-sheets arent very homogene in bulk. Anyway, the idea is good enough to test with bulging/morphing structures Viktorby VDX - General
Hi Sean, ... the powder-bed-SLS is 'selfsupporting' with not melted powder, as shown in sillyarms' link (like in the ZPrinters, where you ink-jet on a plain powder-surface). With paste- or dustblowing SLS you work only on a single spot, so you sinter/melt the material just in time ... With the lathe-method you have a rotating axis, on which you spotwise blow dust in the hot laserspot and onlyby VDX - Reprappers
... i mostly order at Globaco ( ), they have all needed components and needle-sizes - dunno if they ship overseas, so look if you have a similar supporter for dispensing- and soldering-robots locally. My needles have a 'Luer-Lock'-adapter, what's pretty interchangeable as i use the same needles for paste-dispensing, vacuum-pick'n'placing of my micro-parts and for our air-micro-brushes for cleanby VDX - Mechanics
Hi Steve, ... the idea is good --- cover a sheet of shrinky-dink with a thin slice of not shrinking material and heat the compound to bulge out and form a 3D-form. The next logically steps are complex multilayer-sheets with separation-areas between, so when heating the printed part it would morp to a complex 3D-form with embedded cavities and bended structures. What's not so good is the poor aby VDX - General
Hi Andrew, ... thanks for the file - the two-wire-spraybot is a good idea too Actually i'm 'breeding' a bit on my parallel-tripod ( - see "Assembling the Tripod..." ) --- i didn't want to reconfigure the ISEL-controller as i need it for the CNC-repstarp (but i shortly got a second interface-card, so i can play and mess around with it) Now i try to reactivate my 12 years old microstep-driversby VDX - Mechanics
... by the way - by rethinking the wire-systems i realized, that this could be an extreme cheap'n'easy repstrap-basis ... With some ball-gliders, magnets and a steel-plate (or a MDF-plate with an atached iron-sheet) above the wire-plane i can apply a toolhead, which is fixed through the magnets upside-down at the plate, glides freely around with the ball-gliders and is positioned by the wire-triby VDX - Mechanics
... i have a moving robot with an implementer barebone-mousesensor as dispositioning sensor - look at ... A Mouse-camera-transfer to the PC is possible too: The software is open-source too, runs on an Atmel and is programmed in Java and C++ in Eclipse-IDE. Maybe someone is interested in digging into, then i can post all links and transfer more infos ... Viktorby VDX - Controllers
... i want to test with ABS at room-temp, as you can solve grinded ABS-powder in Acetone to a paste, which dries to solid ABS (~70-80% strength of origin ABS) again, when the Acetone evaporate. For my micro-fabbing-experiments i have trouble with very thin nozzles, when the extruded material is to viscous or change viscousity drastically, when cooling down on the way trough the syringe-needle, sby VDX - Mechanics
Hi Demented, ... it's STL too, so borrowing isn't the point ... In the Tools/Objects i placed 3 STL-files for testing dimension - it's no problem to make our own reprap-specific objects around the 'tear-drop'-shape for example If you want something more specific, then mail me a sketch and i expand it to a reprapable STL-object ... Viktorby VDX - Administration, Announcements, Policy
Hi Andrew, ... here a first shot ... With your setup and the measuring-convention from the image below i have this conversion for every X,Y-tupel: La = SQRT(X^2+Y^2) Lb = SQRT((Db-X)^2+y^2) Lc = SQRT((Db/2-X)^2+(Dc-Y)^2) So when you start in the middle, then you have to move through converting the relative X,Y-displacement in La,Lb,Lc-displacement (look for right +/- moving) for shortening anby VDX - Mechanics
Hi Andrew, ... i'll send you the software, when it's functional (can take a while). When you need the formulas for XY-output in the plane, then i'll think it over, should be no problem, it's much simpler then my multi-angle-mechanic ... In the meantime you can try with emc/emc2 - here you can drive tripods too. The string-tripod is a very simple and easy to setup system, so you can play with eby VDX - Mechanics
... it's the principle of SLS (SelectiveLaserSintering) but it's heavy time-consumpting, to lay down the single trays with the extruder and melt them to solid (but i'll do it too for higher accuracy in the micron-area). Mostly you lay down a complete slice of powder and draw your paths with the laser as in a pen-plotter. Another concept is to heat a spot on the surface of your object and blow mby VDX - Reprappers
... here i have three simple test-files - maybe someone can try to import and scale/place them in the working area, as my exporter isn't normed yet ... Viktorby VDX - Let's design something! (I've got an idea ...)
... is someone interested in STL-files from Christmas-cookies, (as Star, Heart, Moon and so on) or other simple shaped 3D-objects to extrude from eatable pastes as chocolate, couverture or so? I can make some objects and post them here - or maybe in a special space for this kind of stuff ... Viktorby VDX - Administration, Announcements, Policy
Hi Jared, ... it's possible to apply a 'linear POT' - a selfmade with wire wound on a stick and a glider can be made too. Or connect the shaft to a 10-turn-POT or sometihing else ... But the resoultion and so the positioning accuracy of the axes is mostly poor or with highly precise parts very expensive. Viktorby VDX - Controllers
Hallo Leute, ... wenn Englisch als Forums-Umgangssprache eine zu groby VDX - Altes Forum
Hi Colin, ... it's my experience with some individuals, i disputed about home-brewed-3D-fabbers in the last years. They argued with 'low-cost' (actually from 15.000 to 25.000 Euros) 3D-fabbers, already present in the market - as the EZPrinter (LOM), the printers from Dimension-printing, ZCorp and so on, which output 'perfect and usable' parts. Another counter-argument was the 'ready-to-assemblby VDX - General
... a main difference to the time, when the Wright-brothers presented their planes is the actual presence of professional, fully developed 3D-RP-printers. So the reprap isn't a really new and exciting gadget, but 'only a coarse 3D-fabber'. This lowers a bit the excitement of the people, as some would say "Why invest time and money in this garbage-assembly, when perfect/better ones already thereby VDX - General
Hi BDolge, ... i agree fully - this is my personal path in developing: First bring to work my 3Axis-CNC-Repstrap (mostly for milling the complexer parts for the next developing steps) - then make some extruders and printheads (as for the CNC too) - and play around with different materials ... - then activate/realize the Tripod (only software left to do) ... - then activate the diode-laser forby VDX - General
... i didn't have any problem with simple setups For me it's a good point too, to give a not so skilled individual the ability to build it without expensive tools and material in his basement in two weekend-sessions ... But as good way to evolving faster, i hope to seed some regional competence-centers - for example at scools, institutes or at home by some enthusiasts as me And here the highby VDX - General
Hi guys, ... good luck and fast progress! I think my CNC-mill-repstrap will work in january or February, as i have to buy and exchange some expensive parts and a stronger mill-head to make some complex parts ... With the Tripod-demonstrator i'm on the elecronics and software, so it should be active in some weeks too. When the software runs properly, then i'll build a second one, capable of faby VDX - Reprappers
Hi Jim, ... it'll take some time, until reprapped cyborgs or such stuff would strife through your nightmares The main idea of the reprap is to make the fabbers cheap and common enough, so every interested could start with his or her own ... Until you can receive the kit from your friend, or give him one, the main goal should be to seed some 'competence-centers' at some locations, so it can spby VDX - Reprappers
Hi Zach, ... then it's a good one With 8 wires it's your deal to drive it as uni- or bipolar, so the 'unipolar' was a bit misleading ... Viktorby VDX - Mechanics
Hi Blerik, ... microstepping does add presision! If you drive your 200-steps-motor with half-steps, you receive 400 (nearly) accurate steps with positions inbetween the 'normal' 200-step-matrix - with 1/4 and 1/8 then ever more (Some companies sell 1/128-drivers too), so an 1/8-microstep-driver turns your stepper with 1600 discrete steps per turn! The absolute position isn't so absolutelly naby VDX - Mechanics