... for protecting the lens you should apply a stream or air (or you work with inert gas) and you have to exhaust the fumes or all your surrounding parts will start to oxidize, as you often have acids and other critical (and carcinogenic) stuff in the fumes ... For 'low-energy' lasercutting or melting, where a focus diameter above 30 microns is enough, i use a single lens with 200mm focal lengthby VDX - Powder Printing and Selective Laser Sintering
... i've been working with micromachining lasers some time and have a 50Watt fiber-laser with a spot-diameter down to 5 microns at home, so laser-'drilling' of really small holes is possible, but you have some limitations with materials and a common laser would cost above 30000 USD, so not really suitable when you didn't have someone around with this equipment Viktorby VDX - Plastic Extruder Working Group
Hi Antti, ... i found the "Конструктор 'Кулибин'" last year too, but wasn't really impressed, as it's only one more of the different XYZ-frames with controller and software. It's much better/sturdier than the McWire-design, so suitable for routing, engraving and 3D-milling-'light' ... but not rigid enough for 'serious' tasks The price of 15.000R is a good point - i crosscalculated something lby VDX - Russia RepRap User Group
Hi Bodge It, ... i'm using Target and Eagle for free ... Eagle is limited in size to 100x80mm, Target is free in size but 'limited' to one sheet, max. doublesided PCB's (no multilayer) and max. 250 pads/pins. Both programs can output etching films or isolation-lines ... Viktorby VDX - General
... e.g. - single-sided PCBs 160x100mm, ca. 30 components (2 SMD), ca. 100 holes, designed and isolation-contours with Target ... had to make 6 of them: - milling the isolation lines ~ 20 minutes. - drilling holes ~ 3 minutes. Viktorby VDX - General
... i'm in a sort of 'evolving phase' about RP and 3D-fabbing since 20 years now ... My experimenting with parallel kinematics went fine, but the tripod is collecting dust two years now and i'm optimizing and enhancing my CNC-mill instead, because i have ready-to-use software and easy-to-snap-on toolhads for milling, paste-dispensing and laser-cutting. Next steps to go are sintering with inertby VDX - RepLab Working Group
Hi Jeremy, ... when making DS-boards, i used silvercoated copper-rivets similar to that in your first link but without press or crimping pen. Simply insert the rivets from top side and solder only the collars with the top pad. Then populate your board as usually and then solder the pins and rivet-bottoms with the bottom-pads. I prototyped some doublesided series (until ten PCB's per serie) usby VDX - Controllers
Hi Seabstien, ... i've got the answer - the design is free and you can use it as you want For referencing you can mention the user "fanti" in the german CNC-forum "Peters CNC-Ecke" Viktorby VDX - RepLab Working Group
Hi Wolfgang, ... ich hab' ja oben schon geschrieben, daß ich's machen würde, wenn ich die Zeit finde ... Sehr schwierig ist's nicht ... hab' sowas schonmal vor vielen Jahren für die Iselfräsensteuerung und HPGL-Bogenkommandos auf dem ST gemacht Du mußt nur aus den G-Code-Parametern den Kreismittelpunkt, die jeweiligen Kreisbogensegmente und die Anfangs- und Startwinkel berechnen und dann in kby VDX - Altes Forum
... die wichtigsten Unterschiede sind die Pins, die Timer und der Speicher - der Arduino Mega hat einfach mehr davon Wenn die überzähligen Pins/Timer verwendet werden, mußt du das Programm umschreiben. Wenn's sonst passen würde, kann man versuchen die Auswahl durch Umschreiben/Kopieren der Defines auszutricksen. Ein Problem bei den Timern könnte noch sein, daß sie anders initialisiert oder adby VDX - Altes Forum
... OK, dann ist das schonmal klar Also entweder von deinem CAD aus alle Kurven als Streckensegmente ausgeben lassen, warten, bis jemand einen G3-Parser implementiert, oder selber schreiben ... Das mit dem Arduino Mega/Diecimilia dürfte vor allem das Problem der Pin-Zuordnungen sein, da der Diecimilia zu wenige hat - soviel ich weiß, kannst du die Auswahl 'austricksen' indem du in den Definesby VDX - Altes Forum
Hi Wolfgang, ... hab's grad mal schnell ausprobiert - unter Arduino0017 hat's ohne Fehler kompiliert ... eventuell mußt du alte Parameter von vorherigen Installationen o.ä. in den Installationsordnern (je nach System in den unterschiedlich lokalisierten user-areas) löschen ...by VDX - Altes Forum
... du kannst dich eventuell durch den G-Code-Parser "process_g_code.pde" durcharbeiten und schauen, was der bei den Kreisbögen macht. Wenn ich Zeit finde, arbeite ich mich da mal rein ... Viktorby VDX - Altes Forum
... mal schaun, beim ReplicatorG habe ich auch statt des Sanguinos den Arduino Mega eingesetzt - du mußt dann bei den Defines und den Pinzuordnungen etwas rumspielen. Ein Problem könnten eventuell die verwendeten Timer sein ... Viktorby VDX - Altes Forum
Hi Wolfgang, ... ich habe den C-142 (mit E/A-Modul), IsyCAD als CAD/CAM und WinRemote als Ausgabe - da kann ich NCP oder G-Code ausgeben. Früher schonmal und aktuell gerade wieder baue ich mir ein paralleles Rack auf, um wahlweise, entweder die Isel-Interfacekarte mit Mikroschrittendstufen 'aufzupimpen', oder mit einem kleinen Arduino die Isel-Endstufen (70Volt, 6A, Halbschritt) weiterzuverwendby VDX - Altes Forum
Hi Wolfgang, ... ich gehe da einen anderen Weg mit einer CNC-Fräse als Basis und 1/256- bzw. 1/50-Mikroschritt-Motorendstufen und aktuell mit einem ISEL-Controller, später miteinem Arduino-Mega. Für 3D und den Iselcontroller habe ich ein propriäteres CAD/CAM, aber auch einge Tools für die Konversion oder DIN/ISO/G-Code aus anderen Formaten oder CAD-Programmen. Erst wenn ich den Arduino am Laufby VDX - Altes Forum
Hi Wolfgang, ... G3 ist ein Bogen in Gegenuhrzeigersinn - schau mal hier in die Referenz und weiter im ersten Link "Primer" ... Also stimmt entweder was in der Firmware nicht, oder die Syntax deines DIN-/G-Codes ist anders aufgebaut Viktorby VDX - Altes Forum
... i would try some MID-methods - e.g. fabbing with a paste mixed from coated metallic nanoparticles and a binder. When fabbing, the paste dries/cures to a non conducting solid, but when heating the surface with a lowpower laser (1Watt should be enough, see my posts about diode-lasers), then the coating breaks free, carbonize, the metallic particles mold/fuse partially and the heated tray wentby VDX - General
Hi Sebastien, ... it's a creation of one of our german CNC-folks - i try to ask him about property rights, but i think it's free ... Viktorby VDX - RepLab Working Group
Hi Marcus, ... look at the images: here i stacked some sheets and milled them afterwards and here i presented another method for fabbing hollow objects ...by VDX - Let's design something! (I've got an idea ...)
Hi Sebastian, ... maybe this is a proper design for a DIY cutting head? Viktorby VDX - RepLab Working Group
Hi Prober, with FFM/FDM you shouldn't receive toxic fumes/vapours unless you overheat When burning materials with a laser you'll get high toxic fumes what can be vented and neutralized with an activated charcoal filter, but you have some recondensing and saturation of the powder with fumes and cracking products, so you should ventilate the building area and let the fused parts degassing for soby VDX - Wanted
Hi Adam, i have installed in german, so my functions are named different, but you should find the colouring menue either when selecting the objects, clicking the right mousebutton (context-menue), select something like "filling and contour" (fourth selection from bottom) and then the middle tab named like "colour of the contourline" or such. Then draw the blue slider to the right or type 255 asby VDX - General
... "Nitrous Oxide", also known as "laughing gas", would have made my day Viktorby VDX - Plastic Extruder Working Group
Hi Reece, ... good to hear, someone is working on this - i want this too ... stay tuned Viktorby VDX - 3D Scanners, Book Scanners, and Optics
... maybe you can convert them from DXF to SVG with Inkscape? Viktorby VDX - General
Hi Prober, i've actually probed with different materials and powders - white or translucent materials are tricky with 1070nm wavelength ... most energy went through or is reflected diffuse ... here a CO2-laser with tenfold wavelength should work much better. Anyway, i tried with white MACOR - it's melting, but didn't evaporate for drilling ... the same with clear glass-spheres or the white/tranby VDX - Wanted
Hi Cathal, ... don't worry, the gas-support is on the way I have some pnematic/vacuum tools as valves, 2-/3-way-switches, connectors, tubes and such ... and found yesterday in our german CNC-forum some more festo-parts for switching and directing gas-flows, so now i can build some more really sophisticated setups for pure or mixed gases or vacuum. The bottles aren't a problem too ... i'm a (tby VDX - Plastic Extruder Working Group
... i tried with 2K-silicone (capable of 350 centigrades continuous and 450 centigrades short exposure) with moulding chocolate and roses metall (melts at 98 centigrades) - image atached. As i had only a small amount of Roses metall, it wasn't enough to fill the complete cavity, so the backplate isn't complete. When no forces are present, the form is stable ... but even with the different load/wby VDX - Casting and Moldmaking Working Group
Hi Sam, ... yes, i know, it's the Carbon changing chemistry - but sometimes a specificied CO2-Argon-Mixture can result in interesting steel-/alloy-properties My intention is to use Argon, as it's common and therefor not so expensive like other inert gases. Recently i tested in air with low power DC and the black 0.1mm-rock-spheres ... they're highly absorptive, so melting wasn't a problem. Bby VDX - Plastic Extruder Working Group