Hi Tornadoboy, ... here: - i tried with stacking sheets and milling them - it works better/faster with prefabbed sheets than extruding the slices by single trays. Or look here: - for another approach ... ... and here some more specific: - Viktorby VDX - CNC Routers, Mills, and Hybrid RepRapping
Hi Til, willkommen bei den Reprappern ... ich habe auch erstmal mit der CNC-Fraese angefangen und wollte dann ueber einfacheren mechanischen Aufbau (Stichwort Tripod-Kinematik: und auch gleich ein Bild meiner CNC-Fraese noch bevor ich sie bekommen hatte ) einen Mikro-Repstrap fuer RP mit einem Paste-Dispenser aufbauen. Die Mechanik steht schon seit einem Jahr bei mir rum, ich komme aber kauby VDX - Schwarzes Brett
... da ich mich zur Zeit beruflich ebenfalls mit HT-Anwendungen beschäftige, hätte ich für spezielle Anwendungen noch andere Lösungen und Infos: - PTFE-Schrumpfschlauch bis 260°C Dauertemperatur - Silikon-Kaltschweißband bis 250°C - "Prestogum" Auspuff-Montagepaste bis 700°C (basiert auf Wasserglas) - "Flüssigmetall" als Wärmeleiter von 0°C bis 1200°C (Conrad 1g etwa 17€) - das Original heißt "Gby VDX - Altes Forum
Hi freds, ... thank you for the link! In our german CNC-forum we're disputing too make it on pur own - i found out that the components are combined as follows: bismut=50%, lead=27% and tin=23% ... Viktorby VDX - Plastic Extruder Working Group
Hi all, ... i tested with low-temp melting "Roses metal" which melts at 95°C and isn't so toxic as Fields- or Woods-metal. For my first test i heated the 100 gramm-probe in a half coconut shell with a hot-air gun until it melts and moulded in my "Han Solo in carbonite" silicone form: ... and here some more detail: The plate is 35mm x 100mm (the figure measures 75mm from knee to head).by VDX - Plastic Extruder Working Group
Hi Adam, when i started with the tripod two years ago there were someone willing to make the software, but now we lost contact (seems he migrated to the USA ) and so it's my part now, i think But actually i'm busy with some other work, so the tripod-development is pausing. Maybe you can configure the kinematics with EMC2? There are some specs for hexapods/tripods, so my tripod-structure shoulby VDX - Delta Machines
... with long wires and closing through the housing you have an antenna, which receives all the ambient frequencies - e.g. the power line or nearby HF-sources like stepper-drivers or such. Try something with shorter wires and/or twisted pairs and parallel capacitive or serial inductive filters ... Viktorby VDX - Controllers
... maybe you've received static high-voltage? When moving or rubbing/pushing plastic components, you can easily accumulate some kilovolts, so you should apply some safety against this too ... Viktorby VDX - Controllers
Hi Ivan, ... look here: - maybe some more ideas? Viktorby VDX - General
... i haven't do anything - it's the cooling and sharp millheads. When looking close, it's like little stairs where the steps of the motors (halfstepping with 0.0125mm) and some cutting-resonances are visible, but overall it stays clear. If the material melts, then you have a milky-white cut, with coolant the cut stays clear. Viktorby VDX - CNC Routers, Mills, and Hybrid RepRapping
Hi Jeff, last week i milled some 3mm and 5mm thick acrylic (apended an image of the parts) - this was milled with a 1.5mm millhead, 11000 rpm, 1.6mm cutting depth and soap-water with some alcohol (common car-windshield washing fluid). If i draw faster and not so deep, i could mill without coolant, but sometimes (especially with older/blunt millheads) the bits are melting though ... Viktorby VDX - CNC Routers, Mills, and Hybrid RepRapping
... this was my first intention too - much simpler and easier to build/assemble mechanics, no belts or gearboxes and some other improvements against a cartesian setup. The only issue is the something complexer software ... but when this is solved, it's the perfect system Viktorby VDX - Delta Machines
Hi Merlz, ... look here: - especially the links and images in my post ... and here: Maybe some other ideas too ... Viktorby VDX - Delta Machines
Hi Alex, ... i think that - either the fast cement is conductive, or you have some additive current through your thermistor what's heating it up, so the reading could be true? Viktorby VDX - Controllers
Hi Anno, for practicable cylinders/pistons you need accurate surfaces, what's not reprappable yet. Better try with elastic materials for structures like the arms of a squid ... Viktorby VDX - General
Hallo Leute, ... da ich schonmal eine Diskussion mit Christine Venaleck wegen Ceramcast angefangen habe ( ), wollte ich hier mal in die Runde fragen, ob es Bedarf für größere Mengen des HT-Keramik-Mörtels gibt? Ich habe gerade ein Projekt laufen, bei dem ich genau sowas brauche - kleben und einbetten von Heizdrähten und PT-100-Sensoren auf eine Edelstahlkapillare in einem Umfeld von 200°C bisby VDX - Altes Forum
Hi Christine, ... first i have to separate between job and private use - the samples would be for tests with an actual project i'm handling with on my daywork - the kilogram-order would be for the same project too. For reprap-use: - germany isn't so populated, i think there are 6 to ten active reprappers here and we wouldn't need more than some 100 grams for our nozzles. Anyway, i'll ask some fby VDX - General
Hi Christine, i'm interested in samples and maybe some kilograms when this material meets our needs. I have to embed some platinum-wires and thermosensors - the coating should be good heat conducting and we have processing temperatures of maybe 300°C to 500°C, so this would be the perfect stuff ... Can you ship some samples to germany? Viktorby VDX - General
Hi all, ... here you can find an open source CAD/CAM-programm for easy creating and milling 3D-objects: Viktorby VDX - 3D Design tools
Hi all, here is a really nice virtual breakoutboard with output to PCB-design software: Viktorby VDX - Controllers
... i just ordered 100 grams of "Roses metal" which melts around 95°C and isn't toxic as Woods metal. I'll test the adhesion on different surfaces - especially wood/paper, ceramics/glass (with waterglass) and some plastics. My hope that this is easier to use than solder ... Viktorby VDX - RepLab Working Group
Hi unfold, ... you must have a REALLY BIG printer! Then it should be no problem to construct your house, unfold it, print, glue together, fill with concrete - and use Viktorby VDX - Mechanics
Hi Leo, what's with replacing the water with waterglass for mixing Alginate? Waterglass shrinks some percents when the embedded water evaporates, but then forms a hard body out of silicate. Search the forums for "waterglass" - i made some suggestions and experiments with ceramic-slurries, but it can be used for other mixtures too ... Viktorby VDX - Plastic Extruder Working Group
... read here: Or search for "paperwork" or "Pepakura Designer" - with Pepakura you can unfold a computer generated 3D-Object into 2D-sheets representing all the surfaces of the 3D-object, print and cut them, then fold and glue to a 3D-body out from paper or thin aluminium-sheets (as i mentioned in the fisrt posts). Then fill the 3D-paper-bodies with some hardening material as 2K-epoxy, concreby VDX - Mechanics
Hi all, ... maybe it's interesting for someone else too: For heating a small volume over 300°C i experimented with a pair of common PT100-resitors - one as sensor, the other as heater. With 30 Volts and 90 Milliamperes the 'heater' reached over 500°C without problems The advantage of measuring with PT100 is the very good linearity ( Temp~(R-100)/0.385 ) The heating-curve was nearly linear tby VDX - Controllers
... actually i'm busy with making slurries for highgrade temperature insulation by mixing the hollow spheres or aerogels with different self-hardening or curable fluids. This sort of material isn't very hard or structural stable - but when building walls out from massive rock-spheres-paste and filling with the isolation material i can make some nice ceramic-objects with hard/stable walls, good tby VDX - Plastic Extruder Working Group
Hi Corwin, ... sorry, it's a bit more complex than only copying sixfold: - when you move one of the outer sliders, then again two fabbing heads are moved simultanous but again perpendicular away from or to this stage. So when fabbing with a hexagonal setup in parallel, you'll get tree identical objects rotated 120 degrees each around the centrum ... and three mirrored objects inbetween too! Soby VDX - Delta Machines
... maybe you should read through this posts: Viktorby VDX - 3D Scanners, Book Scanners, and Optics
Hi Corwin, ... let only the middle-stage of the complete hexagon move down: - then all 6 fabbing heads will move simultan perpendicular away from the stage! With fixing all bars of a stage to a single slider the fabbing heads can move only in the sphere defined by the length of the bars, what's extremely limitating the usability of this kind of setup. So for every move of a fabbing head you haby VDX - Delta Machines
Hi Corwin, ... look at your last drawing - it seems that all the parallel bars atached to a specific stage runs on the same vertical slider. For parallel fabbing in neighbour-areas you have to separate the sliders, so for a complete hexagon assembled from 6 tripods the center-stage should have 6 separate sliders and all border-stages two (or more, when other tripods are atached too) Viktorby VDX - Delta Machines