joaz Wrote: ------------------------------------------------------- > I had the same problem and ended up in compiling > and running it in the 32 bit java version. I took the same approach, these instructions for Ubuntu only took about 5-10 min, and it's all working fine.by greenarrow - RepRap Host
I don't know if this is these are the latest models in the video, but they were updated just six weeks ago: Note, these are the individual components.by greenarrow - General
I normally use Their stock is not as extensive as Farnell (but still very large), they are more orientated to smaller purchases.by greenarrow - Controllers
Pinch wheel extruder AOI files for NEMA17 (I think) and NEMA14 motors: On the topic of AOI, this plugin makes it a little less of a headache:by greenarrow - General
The standard darwin design uses more threaded rod that threaded, but does also require some threaded rod. I've been working on a machine using all threaded rod, using heat shrink to make the rods smoother:by greenarrow - Mechanics
Having access to a laser cutter is handy. You could cut out the Ponoko design: Or a Makerbot from plywood: (this would be my choice if I were in your position) Or the bits-from-bytes design: In terms of extruders, I would recommend a pinch-wheel rather than the old screw thread ones, you could cut out the Makerbot one. I am not a fan of the mc-wire screw thread driven machines as usingby greenarrow - United Kingdom RepRap User Group
kitep Wrote: ------------------------------------------------------- > > * What is the resolution with which the parts > are > > printed? > > ~0.1 mm for most machines > > I've seen this number quoted in a few places, but > I'm not sure what it means. I assume it means > that the extruder can be positioned to 0.1 mm, not > that the plastic laid down is poby greenarrow - General
grael Wrote: ------------------------------------------------------- > I've looked at the beagle board, > It could actually do quite well as a low cost, low > power server, but intel have stepped up their game > with the atom processor, which is big for the > embedded market, on higher spec functionality. > > The beagle board is ARM based, and a fast one at > that, but whby greenarrow - Controllers
I've ordered stuff from Zach a couple of times and did not get done for duty either time. The rate was more out favour then thoughby greenarrow - Controllers
If you have multimeter you could connect the thermistor to the multimeter (disconnect from the RepRap elelectorincs) as this will rule out an other sources of the problem. Then if the resistance measured goes down to zero then something is shorting. If it just goes down a few KOhms then it could be the cement conducting.by greenarrow - Controllers
Forrest Higgs Wrote: ------------------------------------------------------- > Well, like or dislike The Register, the article > therein is well put together. Indeed, one > passage... I agree, it was a very good summary of RepRap with a very balanced perspective. (It didn't say that it was going to solve the world food shortage in 36 hours, or that it's rubbish and pointless because itby greenarrow - General
I've found the old code, I can't remember now if I was using this under windows, linux or both. The files are as follows: pyStepper.c - this is all the low level parallel port stuff It contains functions to step stepper motors, switch digital lines and read inputs. Two stepper motors on the data port (4 bits each) Two dc motors connected to the control port Some switches connected to the statusby greenarrow - Controllers
PWM is just switching a digital line on and off really quickly, and changing the ratio of on time to off time (duty) to make it appear like the voltage is varying. I think H bridge chips will usually just have a digital input to switch them on and off, so you can put either just make the pin high to switch it on, or connect it to a PWM source to vary the output voltage. I'll have to try and diby greenarrow - Controllers
If you are familiar with eagle, then you can get any historic version of the circuit diagram from the svn server here: (click parent directory for other files) Otherwise you could try: You could take the PCB and draw a circuit diagram from it. Start by drawing all the components, then follow the traces on the PCB and connect them up. Then compare the diagram to the one on here: check the vby greenarrow - Controllers
I started out using the parallel port: I used a stepper driver from an old dot matrix printer connected to the parallel port, and a couple of FETs for DC motor control. The stepping code was written in C and wrapped as a Python module. (Message me if you would like a copy of the code) I have since switched to the PIC electronics, as I was having issues with timing, and also did not see thatby greenarrow - Controllers
On the PIC electronics, the three pin connectors on the stepper board that connect to the end-stops, are wired with the signal as the middle pin, and +v and 0v as the outside pins. When I had a similar problem, I removed the opto-electronics completely from the picture by placing pc 'jumpers' onto these connectors. I'm not sure if the connections are the same on the arduino electronics.by greenarrow - Reprappers
I'm in Watford, Sheffield is a little far away for meby greenarrow - United Kingdom RepRap User Group
I wrote this a while back, it's not completely finished but most of it works: It does pen filling and isolation milling. I have had some limited success in creating PCBs, this has been due to the inaccuracy of my machine rather than the program. It doesn't export to STL, but I can't see that doing so would be very useful. I expect the host software would ignore a flat objectby greenarrow - General
i like it. it's like 1984 meets reprapby greenarrow - General
It sounds like a cool idea, and scaling is something that will be great for reprap to be able to do (and bigger too), but in terms of weight saving, the only weight you are going to be cutting down is the steel rods, and you don't need get get them shipped from overseas, just go into any local hardware store. Edit: written before reading nopheads post. Also a good ideaby greenarrow - General
If they don't export to stl natively then you will probably be able to get a plugins to do it. If you can't do that then you will probably be able to export to some other mesh format and use another program to convert to stl. It is very unlikely that whatever program you use you will end up with designs that you can't get to stl somewhow.by greenarrow - RepRap Host
have you changed nullcartesian to cartesian in preferences?by greenarrow - RepRap Host
There's always the option of interlocking slots, and a little glue to hold it. Not quite as elegant but simple and easyby greenarrow - Mechanics
Leav Wrote: ------------------------------------------------------- > I like the Idea! > I think the design should be interchangeable with > steel rods > -Leav This is slightly off topic, but you just reminded me of an idea i had a while back: It would be good to develop some kind of 3d object file that could be customisable by the user with various different options: e.g. the extruby greenarrow - Mechanics
A supply of filament is the one thing that has been holding my repstrap progress back. I've given up making rod from CAPA granules, as it is never a consistent thickness and therefore causes the extrusion rate to randomly fluctuate. I've noticed Ian is now stocking the following at bitsfrombytes: HDPE LDPE UPVC PP (allby greenarrow - Reprappers
You should be able to scale up the machine just by using longer metal rods, and use the standard reprap plastic parts. How much bigger are you thinking? You may run into a few problems with the steel rods becoming less sturdy if you make them a lot longer, to overcome this you would need to user thicker rods (and some re-designed reprap parts for them to fit into). If you want to make one a lotby greenarrow - Reprappers
$170 for all that machined metal isn't bad! that's much cheaper than I thought it would be. Your Cartesian structure looks great, you should be able to do some milling with that. When I said: greenarrow Wrote: ------------------------------------------------------- > strange he wants to do everything himself I was really referring to the extruder, as you can get very cheap complete kits herby greenarrow - General
I used stacks of halved washers held in place with CAPA as I didn't have easy access to any brass tubing, it worked pretty well, haven't had any trouble with them.by greenarrow - Mechanics
Forrest Higgs Wrote: ------------------------------------------------------- > Lord! Linux and "building from source"! I'd > rather get tangled in poison oak. To build 90% of programs in Linux, you type 3 commands: ./configure build build install and that's taking the slow and steady courteous approach. Try that in windowsby greenarrow - RepRap Host