... i'm trying with LOM-fabbing or laminating thin rectangular sheets of material and cutting only the contours and some additional lines in the outer area for dismantling the object from the surrounding material. For this i made an 'inverse' STL, where i constructed a cuboid embedding the object and skeinforge 'filled' only the outer areal with honeycomb lines. As result you would receive a blby VDX - Plastic Extruder Working Group
... i know ... this was a (catastrophic) test how ordering/shipping from USA works, but then it seems the involved banks frauded me and the colleague - finally we payed 3 times the bank-transfer-fee Next time i'll mail my sister (she lives near NewYork) what i'm interested in, so she could bring it with her next time visiting Viktorby VDX - General
... i'm in Germany, so ordering at Amazon USA is a pain - finally i payed nearly 120 USD for Gillilands book (instead of 30 USD at Amazon) after shipping, VAT- and transfer-fees Viktorby VDX - General
... ahh, OK - i couldn't see the videos in your first post, but solved this now, so i finally realized, you worked with Gillilands book too. Until now i didn't have the HP-51604A-inkhead and tried with some others salvaged from old Lexmark and other HP-printers. Have you already tried with other fluids than the original ink? Viktorby VDX - General
... i have the book "Inkjet Applications" by Matt Gilliland ( ) with some circuitry and software for a HP-BW-inkjet. I think some basics and combination wit other brands souldn't be a big problem ... Viktorby VDX - General
... i had some trouble getting high rpms with the nanotec SMC11-microstepping driver ( ) and a standard nema-23 stepper with 1.8°/200 spr. With 12 Volts i only managed to run the stepper with max 6kHz at 1/8 microstep, what's something like 3.75 rpm. With 30 Volts and the same parameters it was running smooth until 20kHz or 12.5 rpm. It's highly dependant of the maximum voltage and the acceleby VDX - Mechanics
... or instead of a single price for the finished concept, maybe funding interesting evolution lines from start works better Viktorby VDX - Kartik M. Gada Humanitarian Innovation Prize
... there should be a regarding clause, so the winning system will be auotmatically published as open source. But you're right - people or groups hoping to win the price will start to develop in secrecy as opponents, not in cooperation with others ... Viktorby VDX - Kartik M. Gada Humanitarian Innovation Prize
... i've had some thoughts abot the 'optimal' design of a real reprap - for me this could be a single but complex part out from an elastic resin resembling a tower-like structure with some dozens canales and cavities within the body. This part is fixed to an array of valves, which could open and close the canales for pressure, so the elastic body deforms and moves the tip with the toolhead arounby VDX - Kartik M. Gada Humanitarian Innovation Prize
Hi sid, ... did you receive my email regarding milling the 8mm-holes? Viktorby VDX - General
Hi Korn, ... sorry, i didn't manage to find the time - but good to hear you found the problem Viktorby VDX - RepRap Host
... maybe we should take a closer look on the parts the common reprap can't print: motors/bearings, electronics/wiring and all other parts actually made from solid metal. Sometimes it's more effective use cheap and/orcommon parts e.g. bamboo-sticks instead of steel-rods or such. We had some talk in the past about replacements for the motors (reprappable linear drives) or major changes in the seby VDX - Kartik M. Gada Humanitarian Innovation Prize
... maybe it's a mechanical problem, if the extruder/mounting isn't rigid enough or you have free play and/or elasticity in the feed. Especially for small circles even with CNC-mills you can receive smaller and distorted eggy or squared shapes because of the play and elasticity in the surrounding mechanics ... Viktorby VDX - Skeinforge
... there are many possibilities - we had some talk in the past about placing molten metallic beads like building with lego-blocks ... One essential point is the adhesion between the already fabbed body and the new placed tray/bit, then you adress the accuracy (step-resolution, tray-diameter or bit-size), material selection/changing, surface-finish and some other aspects defining the usability/sby VDX - General
... this material-question is one of the reasons, i decided to build a paste-fabber instead of FDM. My experiments with waterglass and glasspheres (later with 'rounded' sand ) and silicone-moulding shows that i can fab any complex 3D-form which is heatresistant enough for metal casting or heavy duty wear. And the question of self-replicating ... any lowcost-CNC-mill can nowadays replicate moreby VDX - Kartik M. Gada Humanitarian Innovation Prize
Hi Brian, ... around 2001 i developed a mikro-dispenser which is capable of placing single droplets of high viscous fluids or pastes in sizes down to submicron-range - apended an image with an array of 30 micron big droplets in a grid of 100 microns displacement. The droplet down right is bigger beacause here i placed 3 droplets one on the other. It's patented too, but nobody really wanted thiby VDX - General
... i had a quick scan through and received this errors when compiling: "In file included from hardware\libraries\ThermoplastExtruder_SNAP_v1/ThermoplastExtruder_SNAP_v1.h:37, from ThermoplastExtruder_SNAP_v1.cpp:1: c:/vd/download/arduino-mega/arduino-0016/hardware/tools/avr/lib/gcc/../../avr/include/math.h:439: error: expected unqualified-id before 'double' c:/vd/download/arduiby VDX - RepRap Host
did you receive some red coloured lines in the status-window when compiling? Try another sketch which didn't throw an error an then yours. Maybe it's better you atach the zipped sketch in your next post?by VDX - RepRap Host
i think it's possible to melt the tip of a metal wire with a high current and 'dip' the tip, so a droplet will add to the fabbed object - but the handling and uniformity of the placed volumes isn't so trivial. So try first with simpler/common methods and when this works, evolve further Viktorby VDX - General
... unfortunatelly the TIG-plasmabeam will blow away the powder, so you can't build homogene trays or surfaces Another common method is blowing metallic powder through a plasmabeam so molten droplets will land and fuze to the surface ... Viktorby VDX - General
... looks like an error occured while compiling/linking, so it simply didn'write the hexfile. Search the error in the IDE-statuswindow or while linking ... Viktorby VDX - RepRap Host
... not aerogel, but not really far away - lightweight ceramic slurry with hollow glass spheres: Viktorby VDX - Plastic Extruder Working Group
Hi unfold, i think it's simply the wrong way from G-code back to the 3D-visialisation. Normally you have your 3D-object in the CAD programm which you can change, optimize and so on ... and when ready, the exporter generates the slices and/or paths for your reprap or mill. I sometimes reimport toolpaths back into my CAD/CAM for refining or adding some extras or simply reviewing, but then it's aby VDX - RepRap Host
... OK, found the images on our CNC-server: 1. Mechanical 'mover' - a simple linear actuator with two oszillating surfaces coatet with shear orientated nylon fibres 2. Pneumatic mover - the same but smaller with a piston-oszillator 3. The bases with the fibre-sheets Viktorby VDX - New Zealand RepRap User Group
Hi Vik, ... i've developed some actuating/driving methods scalable down to submicron dimensions - the most interesting is simply a surface with embedded shear aligned fibres (e.g. carbon nanotubes ), pressed on the counter-surface of the object to move and applying (two sorts of) mechanical oszillation. - the first 'coarse' (or longitudinal) mode is simply with linear oszillating the surfaces,by VDX - New Zealand RepRap User Group
... i'm thinking about a fold-out frame embedded in a suitcase - so it's highly mobile and can be stored everywere if not in use ... Maybe it's not so practicable for the standard-reprap, but my setup works with paste-dispensers for roomtemp fabbing and a diode-laser for laminating objects. Another point for a smaller frame is my special interest in high accuracy fabbing with <0.01mm resoluby VDX - Mechanics
... and for the nanotech-aera: - waiting until 'serious' nanotech is out there, you should take a look and some thoughts into the direction of foglets and catoms ... maybe not in the submicron range, but at the start with dimensions of some millimetres ... I think even some prototypes with a box-size of one centimeter will be a big challenge in the beginning >< Viktorby VDX - New Zealand RepRap User Group
Hi LS, ... die Lautstärke ist bedingt durch die Motoren, Geschwindigkeiten und Resonanzen im Gestänge. Die typischen Steppermotoren erzeugen ein deutliches Summen, das je nach Geschwindigeit in der Frequenz variiert und auf Dauer schon etwas nervig sein kann Wenn die Mechanik etwas Spiel hat, dann kommt noch ein leicht knirschendes Geräusch dazu ... und bei bestimmten Frequenzen können auch Rby VDX - Altes Forum
... normal 3 pin RC modules have VCC, GND and PWM - you connect VCC and GND to the corresponding pins (or maybe better to a separate power-source). The PWM-pin of the RC module will be connected to a PWM output of the Arduino/Sanguino (with a separate PS you have to connect GND of the PS/module and the chip too). The PWM circuit in the RC module selects the direction of the servo by the pulse-rby VDX - Controllers
Hi Julie, have you tried with VirtualBox ( ) and a Linux- or Windows-client? They're supporting USB/RS232 and you can test with the 'iconoclastics' I'm running with a Vista-Host and Linux/Win2K/WinXP-clients for older CAD/CAM's and some special problems ... Viktorby VDX - RepRap Host