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General discussions. For specific printers / electronics / fabrication methods / softwares, please see other sections.
Re: Induction Heated Nozzle - 14 years ago
It's been proposed several times. One hacker went so far as to built a circuit and demonstrated the heating work, though, I don't think he actually tried attaching it to an extruder (I may be mistaken on this part.. google might give you some good search results if you search for reprap inductive heating?). I believe Dr. Boyer's comments to this were in effect -- Nichrome works.. why change it;by BeagleFury - General
Re: Avoid first person voice on the wiki? - 14 years ago
I'll pipe in briefly. With a few rules of thumb, I don't see first person pronouns being unworkable. If it is unclear, edit, and add context. If you were the author, simply saying who you are: "I'm Adrian Bowyer; I wanted to design a single extruder driver that could..." If someone else wanted to fix the information but felt uncomfortable writing "I'm Adrian Bowyer"...just use a quoting mechby BeagleFury - Administration, Announcements, Policy
Re: Glass nozzles for extruders - 14 years ago
Great start, Mike. Looking forward to your progress.by BeagleFury - General
Re: Closed Source Can you audit the software that goes in your body? - 14 years ago
Very interesting article, Thanks! I certainly like the idea of opening up source code for auditing when it comes to life saving devices, however, it seems this would only further protect a rogue company from lawsuits (We made our source open for auditing. We can not be at fault for the software bugs that killed your father/mother/husband/wife -- they had full capability of examining the sourceby BeagleFury - Administration, Announcements, Policy
Re: Project: FiveD on Arduino - 14 years ago
> @BeagleFury: Thanks for the link to the NIST > specification. I didn't have that yet and I don't > see multi-line commands either. :-) Using a > regular expression is way over what would fit into > firmware program memory, though. I meant creating a (probably goto based state machine) equivilant to that specific regular expresison, not using a general RegEx parser; you're right,by BeagleFury - Firmware - experimental, borrowed, and future
Re: Project: FiveD on Arduino - 14 years ago
Traumflug Wrote: ------------------------------------------------------- > Without having a sample or a specification of such > a multiline command it'll be difficult to code a > receiver for it. Likely there'll be some sort of > "continue line" character, like the backslash in > the Shell or C languages. When I wrote my host based gcode interpreter, I found the the NIST RS274NGCby BeagleFury - Firmware - experimental, borrowed, and future
Re: POSSIBLE VIOLATION OF REPRAP GNU LICENSE (Edit: Resolved) - 14 years ago
Traumflug Wrote: ------------------------------------------------------- > Zach is (still) in the RepRap core team after the > decision to fork the project? Yet another bell > *sigh* I don't understand why people think forking is bad. Afterall, many of the uses of a RepRap printer itself is to fork hardware (I.E, you want an X to attach to your Z. A manufacturer only makes a Y to attby BeagleFury - Administration, Announcements, Policy
Re: color extruder concept - 14 years ago
Another thing, not directly related... your diagram shows inputs of "red", "green" and "blue", implying that it will do color addition. Unfortunately, I don't think the dyes and pigments in plastic will mix the same way as mixing different color light as you typically do for computer monitor display -- in this regard, I suspect its closer to printing technology, say, a CYMK basis. Except, you'lby BeagleFury - Plastic Extruder Working Group
Re: Amforth and RepRap - 14 years ago
Just for clarification, I think people may not quite understand the "ascii squirt" concept. Feel free to correct me if I am wrong, but, the connection from host to firmware becomes a forth interpreter / compiler. Send the ascii characters "1 3 + ." on the serial line, and you'll see the arduino write "4" as output. Type: ": SQUARE DUP * ;", and you've just asked the arduino to compile a new fuby BeagleFury - Firmware - experimental, borrowed, and future
Re: Amforth and RepRap - 14 years ago
Awesome work Andy. This seems something I'll want to try out, as soon as I can get my head out of the math for motion optimization. Question - it sounds easy to change an Arduino Mega bootloader into a Forthduino... does it require a separate bootloader device to return it to Ardunio? That might put a little bit of a damper if you wanted to just try out forth for a little bit without losing tby BeagleFury - Firmware - experimental, borrowed, and future
Re: color extruder concept - 14 years ago
I agree with James.. looking at the diagram, I think you'll have problems with pressure control pushing the wrong color into the other chambers instead of thru the exit nozzle. I wonder.. how hard would it be to inject dye into a white filament at the extrusion exit? Rather than use different color plastics, use a single plastic base, and 'ink jet' it on the way out..?by BeagleFury - Plastic Extruder Working Group
Re: 35mm film driven repstrap - 14 years ago
jgilmore Wrote: ------------------------------------------------------- > I mean that it's easier and quicker to get an > accurate value for steps per mm. Ah.. yep.. I misunderstood your statement. You're simply proposing one of many ways in which one can measure the open loop calibration, and indicate tolerances on the film strip and pulley keys will likely be higher than a manual measuby BeagleFury - Reprappers
Re: 35mm film driven repstrap - 14 years ago
My thoughts on using encoder vs. using open loop control: Open loop + Lower cost + Lower complexity - Lower reliability - Lower precision - No error/shutdown capability to prevent damage Closed loop - Higher cost - Higher complexity + Higher reliability + Higher accuracy + Error/shutdown capability to prevent damage For a standard RepRap, I think open loop is the marginal winner. However, asby BeagleFury - Reprappers
Re: 35mm film driven repstrap - 14 years ago
plasmator Wrote: ------------------------------------------------------- > Reading back, this is essentially what BeagleFury > posted (though he recommends 2 tracks of Grey > code). So give him the credit. Yeah. Three tracks makes it brain dead simple to write the encoder logic - Two tracks for the 2 bit grey code counter (encoding rate + direction), plus one track for periodic absoluby BeagleFury - Reprappers
Re: Where art thou Utopia? - 14 years ago
stacyjoscott Wrote: ------------------------------------------------------- > Time after time (from > William Morris's Arts & Craft's movement, to > back-to-the-land makers inspired by the 60s ethos, > to DIY punks) we can see that what started as a > dream of collective good ended as product > placement. I don't think it must necessarily be an all or nothing. It is hard tby BeagleFury - Reprappers
Re: Different Plastics. - 14 years ago
KeithSloan Wrote: ------------------------------------------------------- > Is there a Wiki anywhere that compares the various > plastics. I'd suggest starting at the Category - Thermoplastic page on the RepRap wikiby BeagleFury - General
Re: Why use G code - 14 years ago
My firmware also takes this approach. Host interprets GCode, and sends lower level motion commands to firmware (my research deal with motion as N-dimensional cubic spline curves, though, which can be computed very easily and quickly using integer math.) It's not ready for primetime yet... (still!)by BeagleFury - Controllers
Re: Reprap Electronics Devolpment - 14 years ago
aka47 Wrote: ------------------------------------------------------- > Yup I agree with that. > > The question I have at this point is whether the > BEEF wiki pages are the best place to do this. No, I don't think so. However, a section on the BEEF wiki page linking to standards that use BEEF would definitely be a Very Good Thing (tm). Beef wiki organization something like: Intrby BeagleFury - Controllers
Re: Reprap Electronics Devolpment - 14 years ago
aka47 Wrote: ------------------------------------------------------- > ..lots of good discussion.. I wanted to pipe in as well, and expand on a better analogy: BEEF is at the same level of specification as RS232 or 10BASET... I.E, it is hardware only. Just because two devices use an RS232 interface does not mean they can connect and work correctly, simply because the functions using the RS2by BeagleFury - Controllers
Re: Support Material Category proposal - 14 years ago
KurtCircuit Wrote: ------------------------------------------------------- > And i think that whithout a usable and economic > support material (in best case recyclable), this > project will halt at some point concerning build > quality and complexity of the printed objects, > which would be sad. I doubt this. Lack of support material does not kill printability of many objects tby BeagleFury - General
Re: 35mm film driven repstrap - 14 years ago
Here's the start for a 2D pattern. It would support a grid of up to 45x45 cells, where '0'-'9' and 'A' characters replaced by '.' or '|' based on whether the 11 bit grid cell index has a corresponding 0 or 1 bit: |...|01|.. |...|23|.| |....45||. |678|9A||| Alternatively, just print a grid of distinct QR Codesby BeagleFury - Reprappers
Re: Minimum Working area for a RepStrap. - 14 years ago
KeithSloan Wrote: ------------------------------------------------------- > "the largest single parts of Mendel. It's ruffly > 98 mm by 60 mm" > > But what about z-axis? I have heard a figure of > 35mm is that correct? That sounds about right. Worst case, you could get by with less -- tweak the models and print parts in slices (just avoid cutting holes laterally); bond them withby BeagleFury - Reprappers
Re: Support Material Category proposal - 14 years ago
Forrest Higgs Wrote: ------------------------------------------------------- > The discussion of support materials > has been going on for five years now, but the > actual work on making them real has been > effectively zip. Not quite accurate. See Also, I believe someone had experimented using two different plastics, one soluable in acetylene, the other one not... I could have swby BeagleFury - General
Re: 35mm film driven repstrap - 14 years ago
mlagana2 Wrote: ------------------------------------------------------- > ok i'll give it a go with my webcam, what would > you guys suggest i print and stick onto the belt? > In that test i just went into microsoft word and > typed a whole bunch of IIIIIIIIIII's... > > maybe a 1mm line 1cm apart? An algorithmic pattern would be best, in my opinion... because it gives you bothby BeagleFury - Reprappers
Re: Dangerous items vs. Dangerous Censorship - 14 years ago
SebastienBailard Wrote: ------------------------------------------------------- > That may be what the law says right now... I think a jury might agree with my gut ... Exactly. So, the content that you thought was perfectly reasonable hosting (that pink lady model, for example) causes someone to sue you because their 11 year old printed it out and became a sexual deviant... they sue you becaby BeagleFury - Administration, Announcements, Policy
Re: 35mm film driven repstrap - 14 years ago
VDX Wrote: ------------------------------------------------------- > ... optical mices (commonly a camera with 19x19 > pixels) have some thousand DPI, with a webcam and > reversed objective you can resolve pixel-positions > until 2 microns, whats nearly 13000 DPI ... > > With two crosshatch-films i printed with a > laser-printer with 50-microns > "...-line-spacing-line-.by BeagleFury - Reprappers
Re: Reprap Electronics Devolpment - 14 years ago
rocket_scientist Wrote: ------------------------------------------------------- > BEEF > > But to make the boards truly interchangeable, I > think we need to define the interfaces much more > specifically, so that when you replace a single > stepper driver module with a dual or a quad, that > the same pines will still be used for the same > purpose. My suggestion wouldby BeagleFury - Controllers
Re: Dumb Electronics Question - 14 years ago
TC Wrote: ------------------------------------------------------- > lots of good points for using ARM. I'm not at all opposed to using ARM either. Flexibility and choices are always nice. I just don't see it as a necessary step for the current hardware. Assuming the ARM controller is cheap, there's no reason to think you couldn't just replace the low power device with a higher power ARM (aby BeagleFury - General
Re: my cnc-reprap - 14 years ago
What a beautiful machine. How much have you spent in terms of time and money on this device?by BeagleFury - CNC Routers, Mills, and Hybrid RepRapping