... not in my basement yet But here: (flyer: ) is a 'hand-injection-moulding-gun' with nearly 1000bar pressure. AFAIK the pricing is something to 2.800 Euros for the hand-gun excl. the press ... Viktorby VDX - Mechanics
Hi Larry, look here: and here: ... i milled 'oven'-soapstone (what's much harder than normal soapstone) and millable ceramics from Doceram ( ) with normal carbide-millheads. But millable ceramics are much more expensive, so i'll use soapstone instaead It's no problem to mill or to lathe soapstone or this ceramics, but you need carbide tools and best with coolant ... Viktorby VDX - Mechanics
... look here: in the post "Assembling the Tripod..." - here i constructed a 'babysized' parallelkineamtik bot as demonstrator for another project, but this 'toy' would fit the terms and is very easy in building and assembling - only the controlling software is a bit more tricky ... Viktorby VDX - General
... use a gear with needle-like tips or insert needles in a milled encoder-wheel with small radial v-grooves for inserting steel-needles - then the encoder wouldn't slip ... Viktorby VDX - General
... i have pieces of PTFE-coated glass-fabric with a glue-back, so it's simply used like normal self-adhesive - should be common in hardware-stores i think ... For bulk-PTFE-blocks/stripes i use screws only ... Viktorby VDX - Mechanics
Hi Sid, ... here in Germany i use mostly - - in it's original configuration or sometimes - - because of the better boolean syntax ... Viktorby VDX - General
Hi Steve, i was thinking of tank threads too, but it seems to be very complex - you need a special narrow shape fitting the filament, what's not common - so you have to build all the parts on your own. For synchronizing three screws you can build a ring with 6 gears: one is the motor, then every 2th is a screw and two dumb gears between for syncing and closing the transmission. Or imagine planeby VDX - Controllers
Hi Sid, falls du Greifer aufbauen willst, kann ich dir evtl. weiterhelfen helfen - fby VDX - Altes Forum
... atached is a photo with the fabbed parts of both prototypes - the creme-coloured is built from starch, the greenish one should be from gypsum powder with some green colour in the glue-ink ... The basic idea was a high-precise gas-pump with airtight and 'eternal' sealings. When some guys asked for a peristaltic blood-pump, which didn't smash the blood-cells, then i simply inserted two thin eby VDX - Plastic Extruder Working Group
... nope - the ferrofluid is the sealing medium settling along the linear and the spiraling magnet-rails. I designed the pump for transporting gasses or fluids which didn't mix with the ferrofluid or when inserting two separating membrane-tubes in the slit between spindle and tube for pumping blood Imagine fluid half-ropes along the magnetic rails, maybe 7mm wide and 4mm high. When i insert tby VDX - Plastic Extruder Working Group
Hi Sid, wenn du den Selbstbau-SMD-Bestby VDX - Altes Forum
... 'magnetic fabbing' is pure high-tec and high-power ... VAC in Germany builds crazy shaped magnetic objects with NdFeB-granules embedded in resin - AFAIK they use magnetic fields with 5 to 7 times more force then the finished objects should have! It's much easier to fab the non-magnetic body/housing and insert NdFeB-magnets. Here a sample of a magnetic-ferrofluidic pump where i inserted liby VDX - Plastic Extruder Working Group
Hi all, here is an interesting method to make a custom-designed high-speed-microcontroller - here for example a PIC16C57 with 320! MHz. In the actual german c't-magazine ( - should be next week online ) we have a project with PCB and software, where a Xilinx Spartan3-FPGA is surrounded by an ATmega-Controller with a 128MB-SD-card for the different configurations, so you can develop and swap aby VDX - Controllers
Hi Kyle, i've worked with Truespace Versions 4 and 6.5 some years ago - it's a very powerfull 3D-program with a lot of tutorials and samples. You can construct any 3D-object, animate or simulate in a physics-engine and such stuff - good for creating gaming characters and environments, but very nice for straightforward construction of 'simpler' 3D-structures as reprap-parts or objects to fab. Lby VDX - 3D Design tools
Hi All, Microsoft has purchased Caligari and offers the 3D-program "Truespace 7.6" for free as collaboration-platform. You have to register, but then you can download the program and many sample-videos (complete over 300M - here the registry+download-link: And here the german article-source: Viktorby VDX - 3D Design tools
... i'm thinking about a completely 'bed-less' construction, where the robot elevates himself with three rotating threaded rods. Then you can use any plane surface you find, eventually lay a cover-sheet under for better adhesion and/or shielding the table-top. Position the fabber with the extruder-tip touching the surface and let it roll ... Viktorby VDX - Mechanics
... schau dich um und frag, wenn irgendwas unklar ist ... Kommst du evtl. aus Peters CNC-Ecke? Viktorby VDX - Altes Forum
... instad of fluids you can use small glass-spheres, as used for sanding - it's cheap, reusable, behaves nearly like a fluid, but didn't cool down the surrounding plastic-body. I have some 100 gramms of this stuff - the size of the spheres is something around 100 microns, but it's not uniform - i found some bigger ones with nearly 1mm size, very fine spheres smaller then 10 microns and some ovoby VDX - Plastic Extruder Working Group
Hi Joshua, ... the tubes are from (quartz-)glass because of the rigidity and thermic stability as they carry the beam-filters and resonators which have to stay in a defined position with sub-wavelength accuracies - plastic wouldn't give this sorts of stiffness! What's maybe possible is to use plastic-tubes with glass-windows at the ends and fix the resonance-mirrors on a rigid beam outside ...by VDX - Laser Cutter Working Group
Hi Bruno, ... maybe you can find something here: The norm-diameters is 4mm, but they can extrude any size ... Viktorby VDX - Reprappers
Hi sid, all the 3/4-axes-machines with rotary tables i've seen (you switch between Y- and A-axis) works either line-by-line (axial, 1+2-axes-mode) or cylindrical (2+1 or 3-axes simultan) - very expensive ones and 5-axes works 4- or 5-axis-simultan, but for our needs the 3-axes-modes should work fine ... In the axial mode (1+2 = A+XZ) the rotating axe progress a single step an then the mill cutsby VDX - Mechanics
... as example: i have a pigtailed 1W-diode-laser, where the fiber-core has a diameter of 60 microns. With a selfmade optical head assembled from two lenses with 15mm diameter and some tubes i'll have a fine lightweight laser-head in dimensions of 20mm diameter and 100mm heighth with a shielded glass-fiber of 1,5meters to the diode and cooling system. When working properly, you have a ~60micronby VDX - Laser Cutter Working Group
... i mill acrylic, all thermoplastics and aluminium with coolant - simply windscreen washer-fluid from a squeeze-bottle - some drops every 5 seconds are enough, so the shavings stay wet and the drill and material won't get hot ... POM and most duroplastics don't need coolant - here the temperature of the drill can go up to 100by VDX - General
Hi Joshua, here: in the last posts - polymerisation of MMA ... PMMA is a brittle material and with remelting you reduce the maximum strength and create some additional stress in the material, so it's possible that the fabbed objects would develop stress-cracks over time. Viktorby VDX - Plastic Extruder Working Group
... for direct driving a rotating table with a stepper you need a very powerfull one - i'll recommend more then 3Nm, so this would be a matter of size and weight ... I'm applying a 4th rotary axis for my CNC-mill, so i could use it as a CNC-mini-lathe and for 4-axes- or XY-A-milling strategies too. Here you must use microstepping - with 'normal' halfstepping you would receive 400 steps (or 800by VDX - Mechanics
Hi sid, ok, then it's PE ... Beside - i would prefer building with POM - excellent mechanical properties and optimal for milling ... Viktor PS: - jepp, die Kby VDX - Mechanics
Hi sid, ... 20 years ago i built the cartesian mechanic of a laser-plotter out from white POM/Delrin - your black stuff looks cutted the same way, so i'ts maybe POM too. When drilling holes, you need a very stable press-drill or the drill-holes wouldn't be exact aligned. Another question: where are you located? - when in Germany (as your images imply), then maybe i can help you with some spareby VDX - Mechanics
... i have running some VM's with VirtualBOX ( ) under Vista. Here i have DOS some older Windows (98, 2000), Ubuntu (EMC2) and Knoppix-VM's. The VM's have full acces to the drives, USB and shared folders, but for Win98 the Graphics-support is only for 640x480- and 800x600-modes ... Viktorby VDX - RepRap Host
... update ... After nearly an hour curing with the 4W-tube the multi-layered Acrifix/MMA was elastic like a thermoplast. 8 Hours in my basement didn't chnange the behaviour, so the hardening didn't progress furter. The i deposited the chunk in my front-car-window in diffuse daylight for maybe 6 hours - it hardened completely to 'solid plexiglass' and is now strong but a liitle brittle, like sby VDX - Polymer Working Group
Hi Fernando, ... now, after nearly an hour of testing it seems to be clear - small blobs of Acrifix (maybe 1mm diameter, 0,4 high) are complete hardened after 20 minutes UV-radiating with the 4W-tube from 30mm distance. After short exposure, the resin is like gelatine, when covered with a new tray, it's shielded, so the reaction is slowed down - the multi-trays are like leather on the surface,by VDX - Polymer Working Group