Hi Marcus, Eagle has DXF-export ("mill-outlines.ulp") in the ulp-folder. I'm mostly using Target for direct CNC-export. I should have on my mill-PC at home some programs and links for DXF->G-Code-converting ... For converting bitmaps to DXF or other NC-formats i can give you some download-links later today (when at home again) - there are some other programs/converters too we're using in thby VDX - CNC Routers, Mills, and Hybrid RepRapping
... my comercial micro-grippers use nitinol with 0.1mm diameter - heating 0.5 seconds for closing, cooling 1.5 seconds for releasing again. When applying two counteracting nitinol-actuators, you can reduce the moving time to 0.7 seconds in both directions, but it's mostly to slow either My magnetic actuators didn't have a measurable delay, but they're much weaker (or the VC-magnets bigger). Pby VDX - General
ISEL CNC-mill 550x500x90mm working area ... Viktor *** EDIT: maybe images of the machines and some workpieces are helpfull?by VDX - General
Hi Forrest, ... i've made some developments with closed sources or time-limited NDA's (mostly 2 years) and some without any enclosures, so maybe GPL or such It's not so interesting for me ... i would like to share some of the interesting stuff with others, but it's a big chunk of work to transfer all the pieces of a previous 'closed', but potentially really interesting development to public, iby VDX - Administration, Announcements, Policy
Hi Calrson, ... read the "Technology Roadmap for Productive Nanosystems" - it's some ten years, until this kind of technologies will 'hit' the consumer market Viktorby VDX - General
Hi Sebastien, ... my tweezers and actuators are mostly some millimeters to centimeters in size and only partially suitable for bigger scaling ... here i atached images of some of the 'bigger' ones But with some tweaking and redesigning you can build some ten centimeters big actuators too. For a project with Fraunhofer and Festo i designed some elastc kinematics, pneumatic grippers and 'morphiby VDX - General
Hi all, ... all the readings about warping and heated beds let me think about using this for developing of printable actuators and other parts ... My idea is to build actuator-elements out of a heater embedded between sheets of different materials with different thermal behaviour - a 'normal' bimetal-setup, but with plastics, glass-fabric, ceramics and such. This is a reprappable way to toolsby VDX - General
Hi Reinoud, ... i've got 4 of the 8.5Nm-motors+drivers in exchange for some of my spare parts, 3 of the 1/256-microstepping/3A/10kHz-drivers from IMS for 30 Euros each, and awaits 3 highpower-nema-34 1.8°-steppers for 25 Euros each. This aren't parts from the shelf, but dealing and exchanging in our german CNC-forum. I've read recently that another guys sells a bunch of motors and drivers fromby VDX - Delta Machines
... what's the formula of the inks? You can add temperature or solvent ... but this could change the behaviour and UV-sensitivity drastically ... Viktorby VDX - Plastic Extruder Working Group
... i have some high resolution steppers with 50000 steps per rev. or 0.0072° resolution, so i can use them without encoders or other angular sensors with high accuracy. They have 8.5Nm torque and max. 200kHz stepping rate, so they are strong and fast enough for a basic delta. ... on the other side i want to build a high accuracy CNC-mill and -Laser, so i'll use them better here But then i hby VDX - Delta Machines
Hi Torsten, ... have you noticed reduced attracting forces if the angles goes bigger 50°? I think what could be better for this is using two cylindrical magnets and a steel-sphere between them as joint - so you can bend over the complete angular freerun. Maybe a PTFE-collar around the cylinders could help adjusting the orientation ... Viktorby VDX - Delta Machines
Hi Lawrence, i've ordered magnetic spheres, rings and cubes in different sizes here ... My magnetic joints were built with two ball magnets, so are a bit more tricky to calculate forward- and reverse-IK than with two cylinders and a simple steel-sphere as rotation center ... but have some nice stability issues Viktorby VDX - Delta Machines
... oh, yes! - i'm supporter of robosoccer and some other disciplines too It's more the comparison of expense vs. usability, where humanoids loose When i first started with robotics, i tried to develop a walking robot with 'hands', not grippers - but after some early attempts and excursions into 'bionics' and fluid muscles i went other routes ... Now i first research the usability of differeby VDX - Robots!
Hi Sebastien, ... let's look, where the common interests splits ... Humanoids and pet-like robots are really interesting and motivating ... but complicated/inefficient in handling and behaviour Search some real-life-aplications where robots where used ... they are mostly wheeled or multi-pods. Bipeds/humanoids have mostly big problems with balancing or applying forces with usefull stiffness/sby VDX - Robots!
Hi Wendy, ... you change the moving direction when reversing one coil - so you can screw the according pairs in the terminals, test, and reverse later, if the motor turns the wrong way ... Viktorby VDX - Mechanics
Hi Sebastien, ... nice toys ... but i think Matt's milling hexapod would have more benefit Look here for his other hexapods ... Viktorby VDX - Robots!
... thank you for the link I've downloaded the sources and will try to bring it to run - PTAM on windows and maybe PTAMM in a VirtualBox-Linux Viktorby VDX - General
Hi Sebastien, ... sounds good - so i can support you with good optics with higher DOF than comercial systems ... but are searching free software for photogrammetry too ... Viktorby VDX - General
Hi Sebastien, ... i know one of the guys in Frankfurt, but it's some ten years ago we met last Actually i'm more involved in CNC - see the usermap here Viktorby VDX - General
Hi Sebastien, ... i built and programmed some comercial- and hobby-kits - see here and here some of the bi-, tri-, quadro- and simplest hexa-pods and the rolling "c't-bot" ... maybe some of the simpler driving methods can be inspiration for own designs ... Viktorby VDX - Robots!
Hi Sebastien, ... i'm very interested in a small high-density laserscanner - be it handheld or mounted on a base ... The David-project is a good thing, but normal laser-liners are to coarse for real mini-HighRez-scanners, so i was thinking of a shadow-line scanner instead of a leaser-line (David is capable of both methods too). Another interesting approach would be calculating the 3D-surface fby VDX - General
... i tried some plastics with the 8Watt-diode which i had limited to 4Watt optical power for longer lifetime - with a spot of 0.1mm i could melt/cut through maybe 2mm black ABS and maybe 10mm black cellular rubber, but only with relative slow feedrate of some 100mm/min and with much fuming My actual dieodelaser at home has 1Watt power (what i reduced to max. 0.7Watts) and a fiber with a core oby VDX - General
Hi Sebastien, i'm working o an exhausting/filtering system for the laser-fumes and some workarounds for my CNC-software, so i can change the millhead with the laser 'on the fly' - then i'll start over with my CNC-mill at home and make some pictures ... the previous laser-related work was covered by NDA, but now i'm 'free' @RyanGeorge: - yes, i posted in some other threads some infos about theby VDX - General
... i have a 50Watts-fiberlaser with 1070nm and a focussed spot around 30 microns with a single lens or below 10 microns with a beam-widener ... Viktorby VDX - General
... interesting question ... which stability is possible with plastic-chucks The motors aren't reprappable yet, but all the holders and fixatures are - i remember a post or blog where someone made some lathe-supports out from sandfilled epoxy or plastic and embedded some berings for a steady rest (? - german "Lünette"). When fabbing moulds for metal-casting you can build your own chucks and toby VDX - Mechanics
Hi Sebastien, ... yesterday i received some samples of ceramic and glass microspheres for experimenting with paste-mixtures. I think some of this stuff could be the ideal powder-basis for printed hightemp ceramics for moulds or such - think about my results with glass-spheres and waterglass withstanding 800°C to 1500°C I'm busy with paste-dispensing and laser-sintering, but if you need some sby VDX - General
Hi Sebastien, today i was emailed by ZCorp (DE) about a new e-book regarding powder-printing. It's mostly based an the ZCorp-printers, so maybe a big chunk of underlying advertising included ... but in the english section you can find some interesting infos and documents about powder-printing too ] to title page. -Sebastien]by VDX - General
Hi Eric, ... i'm awaiting a bigger/stronger stepper so the max. dimension will change and i have to redesign the motor-holder and the support. So when i have the final metrics i'll mill oll the holders and assemble the CNC-turning axis first, this is much more promising than a 'simple' lathe I'll feed the progress in ... Viktorby VDX - Mechanics
... with Lego or other 'constructor'-kits you'll make a specific frame- and feeding design best fitting to the mechanical and static possibilities of the bricks/elements. Darwin and Mendel were 'born' in the view of rod'n'thread-frames ... with other construction basics there will be complete different mechanics and designs, so this would be a complete different world to explore Viktorby VDX - General
... there were some post about running Lego-RepStraps, but not a really big community behind Building with 'standard' Lego-pieces isn't really stable ... or you have to use glue to fix the bricks to a solid body. Better use the Technics-bricks with interconnectors ... but for bigger dimensions this is something shaky too. I think with a good design you can build a frame rigid enough for the cby VDX - General