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Quotedc42
(1) will be less work for you to do, but (2) will give more precision. Either way, you will also need to change the homing code (how do you home a Tandem?). In RepRapFirmware, all you need in the firmware is homing primitives. The homing functions themselves are defined in gcode macro files, which makes it very easy to change them.
I don't think the programming is difficult, but even s
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Capo
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Firmware - experimental, borrowed, and future
Bringing the conversation back to the OP, the kinematics I would like to implement are described here (TandemB/TandemC). I have been looking over NickE27's delta-temporal branch of Teacup to get a feel for what sort of changes would be required. Some of the changes put in place by Nick I can follow, others not so much. Other than the wiki page and commenting itself, are there any other sources of
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Capo
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Firmware - experimental, borrowed, and future
Hi everyone.
Modern reprap firmware is great and has definetely come a long way in the last few years. However, its no longer very approachable for casual tinkering.
I understand that this is a necessary evil in order to make it compact and fast enough to handle all of today's requirements on the often limited hardware, but is there anything out there that's a little more basic? I don't mind sa
by
Capo
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Firmware - experimental, borrowed, and future
Hi Victor
It sounds like you have an interesting project. Any chance you have a blog I could follow?
If you like I will stop by the SLM lab (its just a few doors up from a lab I work in) and get a few photos of their setup as I get the feeling it might give you a few ideas.
Richard
by
Capo
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Powder Printing and Selective Laser Sintering
I recently came across this project description at my university.
Development of an innovative manufacturing technology- Selective Laser Melting(SLM) (Two PhD students)
Selective laser melting is a technology which can be used to build ready-for-use 3D components from their computer designs in one step. A 3D component is formed by using a fibre laser to scan and melt the metallic powder layer
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Capo
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Powder Printing and Selective Laser Sintering
My apologies for not getting back to you Cefiar. I got it stuck in my head that the meet up was this coming weekend and thus I wasnt keeping a close eye on the forums.
As I'm overseas for much of Feb the next CCHS meeting I will be at will be around the beginning of March some time.
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Capo
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Australia, Melbourne RUG
I commend your work, but for the sake of the environment I hope it doesn't catch on.
On the other hand, if your able to extrude custom 3mm or 1.75mm filament for a good price then you could do quite well.
by
Capo
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General
I had a similar problem as you with a Mega Clone and RAMPS. To try and figure out what was going on I ran this sketch which just prints the analog reading for pin's 1 and 2 to the serial display.
int tempPin1 = A1;
int tempPin2= A2;
void setup() {
Serial.begin(9600);
}
void loop() {
Serial.print("TempPin1 Reading: ");
Serial.println(analogRead(tempPin1)); // read the value from anal
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Capo
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General
I saw this video the other day which the OP may find of interest.
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Capo
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Controllers
A quick thought, is PTFE tubing even necessary?
I just saw the image below on this blog:
It looks like they are using a Bowden extruder but the feed tube is a quite different. If ABS is anything like HDPE then i imagine it will have a very low friction coefficient with steel.
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Capo
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Wanted
I just noticed the link below came up on ebay today. For some reason this forum doesnt like the way that link is formatted and so I had to display it as an email address so that it would show up correct =S
http://cgi.ebay.com/PTFE-TEFLON-TUBI&#
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Capo
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Wanted
Its good to see a few different suppliers are around after all.
jmgiacalone Wrote:
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> Hey guys,
>
> I have been in touch with these guys, which I
> think Erik DB mentioned a while back. Anyway, I
> received a sample of TW13 last week which was a
> little too tight on 1.75mm filament. I plan on
> ordering some PT2x3 this
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Capo
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Wanted
Thanks for the update and photos ckaos.
Something else that may help to improve your resolution is to shroud the photo diode by sleeving it with some heat shrink tube. This should help reduce the amount of noise coming from the surrounding area.
I look forward to seeing your experimental software when ever you feel its ready. With a bit of luck, by the time you have a version out my second reps
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Capo
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3D Scanners, Book Scanners, and Optics
Cefiar Wrote:
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> They're about 7-8 grams a rod.
>
> Based on 8 grams, it should be about 800g per
> 100m, or 400g per 50m, which is close to the
> weight I guessed at.
So thats somewhere around AUD$50/kg including GST. Looking at the wiki page this seems to be a little on the steep side. Or am I missing something?
Cefiar Wro
by
Capo
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Australia, Melbourne RUG
richrap Wrote:
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> Bowden Cable - PTFE / Teflon Tube
>
> If you have any or know where I can get some in
> UK/Europe please let me know.
>
>
> Thanks.
>
> Rich.
Ditto.
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Capo
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Wanted
I find your work very interesting and i'm a little surprised no one else has given it much attention on this forum.
Its the shear simplicity and lake of physical parts required that I like. There are a few similarities between what you are doing and Atomic force microscopy (AFM). Instead of a physical cantilever to generate the signal you are using your photo diodes.
There are two different m
by
Capo
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3D Scanners, Book Scanners, and Optics
Thats some serious hardware they have there.
I'm surprised that the printed chair doesn't undergo horrible warping. Then again, it looks like all the printed areas are of the same width and so should cool at around the same rate.
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Capo
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General
martinprice2004 Wrote:
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> In conclusion I would suggest using a weld arc is
> probably a technical dead end. Industry generally
> considers this to be the case which is why metal
> sintering was developed.
I completely agree. To get any useful resolution with a welder you would need to reduce the current in the arc by a large am
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Capo
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General
Cefiar Wrote:
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> I picked up some sample rods from Jeremy today.
> I'll have them with me at the next Melbourne
> HackerSpace. Was good to see the setup they have,
> and all the materials they produce.
If you get the chance, are you able to weigh the sample rods you have so we can get a $/kg estimation.
Thanks!
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Capo
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Australia, Melbourne RUG
Cefiar Wrote:
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> PS: I know the Melbourne HackerSpace is also on
> that weekend (both days). It's quite possible we
> could meet there first, hack about a bit, and then
> have a BBQ somewhere.
That sounds like a good idea to me.
If all goes to plan you can count me in for both.
by
Capo
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Australia, Melbourne RUG
Hi rapatan
On the MetalicaRap wiki page it says your on the look out for metallurgists to help with the project.
I just finished a science undergrad with a major in materials sciences which briefly covered microstructural development, microstructural design, modelling and manufacturing processes.
If I can be of any help let me know.
-Capo
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Capo
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MetalicaRap
Hey guys I have just created a wiki page for this fantastic extruder. I will try and get in touch with the creator some time soon to see if we can get some close up photos and code for the micro-controller.
I'm deficiently going to have a go at building this myself.
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Capo
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General
Thanks, I will move on to that next. I just updated the details on the wiki for cad.py for windows if anyone else is interested. It seems to work ok for milling as well.
by
Capo
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Firmware - mainstream and related support
Hi Tim
Sounds like you are at the same point I was a few months back. If you have already started collecting printer parts then I would highly recommend looking into the Mantis Machine as possible repstrap design. The only tools required are a saw and a drill and it really takes no time at all to put together. There are also a few good instructional videos on the site too.
If you pull apart eno
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Capo
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General
The reason that plastic doesnt undergo a fast transition from a solid to liquid is because its weak (secondary) inter chain bonds break down due to thermal agitation at a lower temperature (Tg) than the stronger (primary) bonds which hold the chain together. So in other words, after your plastic has 'melted' it still maintains its long molecular chain structure which get tangled as they pass by e
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Capo
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Paste Extrusion Working Group
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