Unsurprising. The WSJ was bought by News Ltd and that corporation is currently trying to figure out a way to charge for internet delivery of news content. Boils down to them having trouble figuring out how to get you to pay to listen to them tell you how not paying is unworkable. This corporation is the pure definition of the antithesis of open source. News Datacom Systems encryption controlby murd - General
MarcusWolschon Wrote: ------------------------------------------------------- > I'm currently designing a carthesian-bot that > should work but AoI is crashing > on me all the time and boolean operations take > minutes after you subtracted > 3 objects already. Try the HeeksCAD that Viktor left a pointer to elsewhere. For a freeware program, it's very, very good.by murd - Reprappers
In the setup I drew, I envisaged the cable being tensioned by the return pulley at the other end of the drive from the motor, because the cable is locked onto the drive windlass. I built this scroll saw about thirty years ago. It's driven by a hand-held cake mixer (it had a variable speed control) with reciprocating linkage and cable drive and tension It looks a bit poorly and cobwebby becaby murd - Reprappers
I've been giving this some thought as well, because it'd be possible to do away with the belts and cog gear. Elsewhere in the forums, it's been proposed to use the cable that hand-control combat model planes use, but I think that cable is too heavy, unnecessarily so. Nylon-covered, stranded-stainless-steel cable is sold in fishing stores, it's used to make leaders that attach the hook to the nyby murd - Reprappers
Viktor, this is a nice surprise! It uses the same OpenCascade base as FreeCAD, and the two programs exchange STEP and IGES files. HeeksCAD has a better GUI than FreeCAD, and isn't reliant on parameters and modular workbenches. Modeling is faster and more intuitive, and HeeksCAD can loft and chamfer, features FreeCAD doesn't have, but a model can be imported into FreeCAD to take advantage of itby murd - 3D Design tools
Had a look at the Huntsman (formerly Ciba) Araldite Digitalis machine video here? Very, very impressive. The closest thing to true CAD-to-product rapid manufacturing yet. Works like the original UV photopolymerisation, but instead of one pinpoint of UV light, it can expose up to 40000 points simultaneously, so can produce at the order of thousands of times faster. And they've got it produciby murd - General
There are differences between the stls and how you'd make them from solid stock. The stls' holes have greater clearance, and I found that the Mendel corner brackets are asymmetric, which isn't apparent or marked, so it mustn't have been deliberate, but could cause difficulties in assembly. Even cheap commercial CAD makes this sort of analysis and printing so much easier.by murd - RepRap Host
I once worked in a factory that blow-molded bottles. The blow-molding machines were fed by extruded molten tube. The extruders were screws with a pitch that grew progressively finer and turned continuously in a heat-zoned barrel that heated the resins but didn't let the plastic get really fluid until it was pushed through a final heat zone with external heater, plus a heated torpedo in the centby murd - Plastic Extruder Working Group
Weaver Wrote: ------------------------------------------------------- > hi am new to reprap and am trying to find the > files for the printed parts of mendel i have > downloaded some stl files but am unable to open > for some reason they say 'certificate trust list' > by the side of each file. i would like to use them > in autodesk inventor i have the stl import add in > coulby murd - Reprappers
This one doesn't look so cool because I was beating it up at home and don't have the equipment and jigs that I've got at work. Works the same though.by murd - Plastic Extruder Working Group
I'm a bit of a latecomer to reprap, but I'm keen to build one and see what it can do. I think I've probably lucked in because Mendel has arrived and I really like the look of it. I think I'd be able to build a lot of it, and I've found that Bunnings have galvanised studding suitable for the frame, and suitable leadscrew studding is available from a fastener supplier near where I work. I'm sourby murd - Australia, Sydney RUG
Thanks for that, Sebastian. I've got uses for that beyond reprap. murrayby murd - Plastic Extruder Working Group
There are a couple of brands of vinyl molding compound on the market, Gelflex from Bayer, and another called Vinamold. I've no experience with Vinamold, but I've used Gelflex. There are three grades, ranging in melt temperature from 130° to 155°. The material can be cleaned, cut up and remelted when the mold gets a bit ragged, so it's more economical than RTV silicone compounds. I can see twoby murd - Plastic Extruder Working Group
Whichever CAD tool we use, reprap doesn't really have neutral format files to work with for the parts. The file repository has Solid Edge, which is proprietary, AoI for open source, and stl, for printing, but no IGES or STEP. Adrian's team ought to be able to output those formats from Solid Edge. I'm competent in many commercial apps and I see I'm not alone. I think it's a backward step (no pby murd - 3D Design tools
When the football world cup was held in Korea and Japan, the Japanese sprayed an adhesive over the rubble that train tracks are bedded on so that activists opposed to the competition couldn't easily grab the rocks and throw them at trains. It still allowed the rubble to shift underneath, so the vibration from the trains' progress didn't travel through the surrounding ground, as normal. Starch uby murd - General
I'm building a Mendel using solid rod, which is available and cheap, but I've modified the construction to use a number of joining components I designed for a production item that I distribute. For example, the bottom corner connector reprapped brackets are replaced by four connectors each corner. I've produced lots of the joiners, combined with the rod they're almost a Meccano-style constructiby murd - Plastic Extruder Working Group
Viktor, I've experimented with cyanoacrylate to get those properties. I've mixed gel cyano with water-thin to adjust dispensing viscosity, and have tried amine accelerator for instantaneous curing, and dusting with bicarbonate and talc, because I've read that it's hydroxide ions that initiate the cure. Cyanoacrylate is commonly available here in Australia at around 10 cents per gram/cm³, whichby murd - Plastic Extruder Working Group
There's a newish LOM fabricator in Ireland called mcor. They've concentrated on developing a machine that, while it isn't the cheapest at around USD 22K, uses everyday A4 office paper to layer. It's been promised "coming soon" for a year or two, but it can be seen at the odd trade show. Material costs are the star attraction. A fortunate dumpster find has given me the idea of doing somethby murd - Reprappers