General discussions http://dev.forums.reprap.org/list.php?1 Sat, 21 Nov 2009 04:40:17 -0800 Phorum 5.2.11 http://dev.forums.reprap.org/read.php?1,30342,30342#msg-30342 http://dev.forums.reprap.org/read.php?1,30342,30342#msg-30342
If there is enough interest, I am willing to make a run of PEEK thermal barriers for the extruder. I would have to charge about $12.00 each, plus shipping ($1.50), for them.

Regards,

Brian]]> reifsnyderb General Fri, 20 Nov 2009 12:53:47 -0800 http://dev.forums.reprap.org/read.php?1,30305,30305#msg-30305 http://dev.forums.reprap.org/read.php?1,30305,30305#msg-30305
Have been lurking for a week or so and have to say i love the whole idea behind this project, it's like magic, both the creating things out of thin air aspect and the opensource side of things too, spot on! :)

So i looked around and saw all the kit's for sale, but i love a challenging project so i'm gonna attempt to build one, not an expert in any field, but i can be kinda handy.

Ultimately i would like to end up with a mendel, so will need to do a repstrap first and reuse some parts to make a mendel.... can i use Mcwire motors in a mendel by altering the mounts or vicea versa, or will i need two sets of motors? or is there a better way i have not come across yet?

Looking forward to passing on my first set of printed parts.]]> Reprobate General Sat, 21 Nov 2009 02:23:04 -0800 http://dev.forums.reprap.org/read.php?1,30257,30257#msg-30257 http://dev.forums.reprap.org/read.php?1,30257,30257#msg-30257
(http://forums.reprap.org/read.php?70,10142,11532,quote=1)

and I want to try this but cannot locate a good (cheap) source for the chemicals he listed:

Benzophenone
Benzil
Benzoilisobutylether
MDEA

Can anyone suggest an online shop for this stuff?

Thank you.]]> brassflower General Wed, 18 Nov 2009 04:55:48 -0800 http://dev.forums.reprap.org/read.php?1,30140,30140#msg-30140 http://dev.forums.reprap.org/read.php?1,30140,30140#msg-30140
One of the issues I seem to be getting is finding a good way to get the
extruded plastic to stay were it has been extruded.

I just wondered if anyone had played around with static electricity as a way to get plastic to stick. If static electricity can cause a ballon to stick to a wall how about plastic to a reprap print bed.

Apparantly static electricity is used in spray painting to make the paint stick.

(from wikip)

[edit] Electrostatic spray painting (Powder-coating)
The atomized particles are made to be electrically charged, there by repelling each other, and spreading them selves evenly as they exit the spray nozzle. The object being painted is charged oppositely, or grounded. The paint is then attracted to the object giving a more even coat than wet spray painting, and also increasing the percentage of paint that actually sticks to the object.

Source [en.wikipedia.org]

regards

Stephen]]> stephen george General Mon, 16 Nov 2009 10:39:07 -0800 http://dev.forums.reprap.org/read.php?1,30132,30132#msg-30132 http://dev.forums.reprap.org/read.php?1,30132,30132#msg-30132 murrayd General Fri, 20 Nov 2009 15:52:48 -0800 http://dev.forums.reprap.org/read.php?1,30036,30036#msg-30036 http://dev.forums.reprap.org/read.php?1,30036,30036#msg-30036 Ist easy schnappen der springenwerk, blowenfusen und poppencorken mit
spitzensparken. Ist nicht fuer gewerken bei das dumpkopfen. Das
rubbernecken sichtseeren keepen das cotten-pickenen hans in das
pockets muss; relaxen und watchen das blinkenlichten.


minor reedit of a clasic for makerbot/reprap :)]]> RBisping General Sat, 14 Nov 2009 11:15:34 -0800 http://dev.forums.reprap.org/read.php?1,29988,29988#msg-29988 http://dev.forums.reprap.org/read.php?1,29988,29988#msg-29988
[online.wsj.com]

[blog.makerbot.com]]]> mfsamuel General Sun, 15 Nov 2009 02:55:39 -0800 http://dev.forums.reprap.org/read.php?1,29762,29762#msg-29762 http://dev.forums.reprap.org/read.php?1,29762,29762#msg-29762 drummerboyx General Sun, 08 Nov 2009 16:02:43 -0800 http://dev.forums.reprap.org/read.php?1,29735,29735#msg-29735 http://dev.forums.reprap.org/read.php?1,29735,29735#msg-29735 www.youtube.com]
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 producing a tray of roses (with individual petals!) simultaneously to show off the speed and detail. Their site says they'll work out how much to charge for it compared to the opposition and start shipping it about now.]]> murd General Fri, 06 Nov 2009 22:47:12 -0800 http://dev.forums.reprap.org/read.php?1,29649,29649#msg-29649 http://dev.forums.reprap.org/read.php?1,29649,29649#msg-29649
I would like to ask admins to edit the page: [www.reprap.org]

And put there at least a link for the information on page: [objects.reprap.org]

BrendanErwin started to wrote the EmcRepStrap but is not more interested on it. I already started to build my own EMCRepStrap and want to document it, to help others and myself.

Thank you.]]> casainho General Wed, 18 Nov 2009 11:36:50 -0800 http://dev.forums.reprap.org/read.php?1,29569,29569#msg-29569 http://dev.forums.reprap.org/read.php?1,29569,29569#msg-29569 I have a PWM driver that I got from the makerbot store along with my generation 2 electronics. When I hook up the nicrome wire to it to see if it heats up, the ATX power supply shuts down before it heats up.

I have no clue whats happening.

Thanks,
Drummerboyx]]> drummerboyx General Mon, 16 Nov 2009 04:57:43 -0800 http://dev.forums.reprap.org/read.php?1,29505,29505#msg-29505 http://dev.forums.reprap.org/read.php?1,29505,29505#msg-29505
Just letting you know.]]> M.qrius General Mon, 02 Nov 2009 22:03:16 -0800 http://dev.forums.reprap.org/read.php?1,29500,29500#msg-29500 http://dev.forums.reprap.org/read.php?1,29500,29500#msg-29500
[blog.makerbot.com]

But looking at it... am I the only one that sees a potential for an extruder that could use granular plastics?

if it was a metal melt chamber, with a large air void at the top (and maybe a clever method for adding more plastic) where all the plastic was brought to melting temp... and then forced out in exactly the same way as in the Frostruder MK2.

If it works for viscous fluids at room temp, why not at higher temps? It will need a beefier heater, but thats the only real problem I can see... (and I'm already mulling ideas of how to print a pressure vessel, mmmmm dangerous!)

And yes, I'm ignoring the added complexity of swapping 1 stepper motor for a compressed air system and the mess that makes of the vitamin concept ;)]]> TheRuttmeister General Fri, 06 Nov 2009 19:25:36 -0800 http://dev.forums.reprap.org/read.php?1,29321,29321#msg-29321 http://dev.forums.reprap.org/read.php?1,29321,29321#msg-29321 This site sells ABS bars in the Netherlands, but they're more yellow than usually, and they call them welding rods. Is this still suitable for extruding?]]> M.qrius General Thu, 29 Oct 2009 14:27:46 -0700 http://dev.forums.reprap.org/read.php?1,29273,29273#msg-29273 http://dev.forums.reprap.org/read.php?1,29273,29273#msg-29273
Does anybody know a UK PLA supplier. OR a US one with reasonable shipping?

So far I have only located a New Zealand supplier.]]> emt General Mon, 16 Nov 2009 04:41:36 -0800 http://dev.forums.reprap.org/read.php?1,29264,29264#msg-29264 http://dev.forums.reprap.org/read.php?1,29264,29264#msg-29264 Rep Rap Laser Cut


Cut it paint it and then remove the paper :)

Anyhow take it easy.

ril3y
contraptor.org - Open Source Hardware Prototyping]]> Riley Porter General Thu, 29 Oct 2009 08:36:26 -0700 http://dev.forums.reprap.org/read.php?1,29240,29240#msg-29240 http://dev.forums.reprap.org/read.php?1,29240,29240#msg-29240
How can I wire my 5 wire stepper with the bipolar 4 wire stepper driver?

Thanks,
Drummerboyx]]> drummerboyx General Sun, 15 Nov 2009 13:25:08 -0800 http://dev.forums.reprap.org/read.php?1,29203,29203#msg-29203 http://dev.forums.reprap.org/read.php?1,29203,29203#msg-29203 I was looking at the nozzle design, and couldn't quite understand some parts of it:

- What use is the copper jacket? I don't see it serving any purpose, except looking nicer.

- Wouldn't it be best to keep the brass barrel as short as possible, and put the heater wire as near to the end as possible, to keep the molten part as small as possible? I see no mention of this.]]> Marius General Sat, 31 Oct 2009 16:03:55 -0700 http://dev.forums.reprap.org/read.php?1,29187,29187#msg-29187 http://dev.forums.reprap.org/read.php?1,29187,29187#msg-29187 The criteria seem to be:
-readily available
-easily dissolved
-strong enough to use as support

This is going to sounds strange, but has anyone considered chocolate?
It's readily available, reasonably strong, and because of a low melting point, it can be removed in boiling water.
The only problem I see is how to make a decent extruder. Perhaps you'd need a basin of molten chocolate, relying on gravity for extrusion, or perhaps someone can come up with a better concept?]]> Marius General Wed, 18 Nov 2009 10:01:20 -0800 http://dev.forums.reprap.org/read.php?1,29161,29161#msg-29161 http://dev.forums.reprap.org/read.php?1,29161,29161#msg-29161
How do the high-end 3D printers that extrude plastic work? Do they have smaller nozzles and better feeding mechanisms?

-Tom]]> Tom Frisch General Wed, 28 Oct 2009 02:38:22 -0700 http://dev.forums.reprap.org/read.php?1,29084,29084#msg-29084 http://dev.forums.reprap.org/read.php?1,29084,29084#msg-29084 Anonymous User General Sun, 25 Oct 2009 12:36:52 -0700 http://dev.forums.reprap.org/read.php?1,29067,29067#msg-29067 http://dev.forums.reprap.org/read.php?1,29067,29067#msg-29067
My senior design group and I are working on building the Darwin. We are trying to figure out how much material is needed to build the parts of Darwin that can be made in a RepRap machine (we are going to manufacture our own parts). To do this, I figured I could download the parts list for Darwin 1-0-6 and find which parts are the plastic parts. I found no documentation on this. After I opened the STL file from the "Assemblies-and-parts" folder, all the parts of the STL file were listed in the folder, but the parts are labeled by numbers.

Is there a document that gives the part names for the corresponding part number used in the STL file of Darwin 1-0-6?

Is there any document that can give me the total volume of material needed to produce Darwin's plastic parts?

Thanks for the help.

-rusdp]]> rusdp General Wed, 28 Oct 2009 08:56:14 -0700 http://dev.forums.reprap.org/read.php?1,28955,28955#msg-28955 http://dev.forums.reprap.org/read.php?1,28955,28955#msg-28955 I would do it, but since you need to be in the US to start a kickstarter project and I live in Canada, I can not do it :(

Any volunteers ?]]> lcomtois General Fri, 23 Oct 2009 21:10:17 -0700 http://dev.forums.reprap.org/read.php?1,28951,28951#msg-28951 http://dev.forums.reprap.org/read.php?1,28951,28951#msg-28951 johnrpm General Mon, 26 Oct 2009 04:49:11 -0700 http://dev.forums.reprap.org/read.php?1,28946,28946#msg-28946 http://dev.forums.reprap.org/read.php?1,28946,28946#msg-28946
I am trying to figure out the cost of printing and shipping the new Mendel parts.]]> lcomtois General Tue, 27 Oct 2009 21:47:23 -0700 http://dev.forums.reprap.org/read.php?1,28905,28905#msg-28905 http://dev.forums.reprap.org/read.php?1,28905,28905#msg-28905 In my opinion, this is a critical issue. I would really like to build a Mendel machine but it is difficult for me to find who can print something for me, and it seems like I am not the only one with this problem. A forum is not the correct format to expose this kind of information.

The idea then would be to start a dedicated exchange system where users could create a profile with details about their machines, their needs, their designs and what they offer, and make some search. The system would keep track of the most active persons and help people to see who is reliable and who isn't.

I have been reviewing several similar softwares during the last months, for another project, and I eventually found that one (open source, of course):
[www.project-open.com]
it is quite business-oriented, but it may be customised to meet the need of the reprap community. Of course, if anyone finds better...

I don't have enough skills to run a server myself (though I would like to) but I would be very happy to help with finding and setting up something. Is anyone interested in this?]]> Lionel General Sun, 08 Nov 2009 16:21:42 -0800 http://dev.forums.reprap.org/read.php?1,28867,28867#msg-28867 http://dev.forums.reprap.org/read.php?1,28867,28867#msg-28867 exactly where the nozzle is aiming regardless of where the step count has placed it, then if it is off a little to try to shift it back into the right position through a lot of trial and error. You could give it a set number of chances to reposition it or a percentage of accuracy to aim for, and then for speed purposes have it move on. Yeah this would slow things down by A LOT, but I’m thinking that you might be able to get much cleaner pieces this way.

The idea came to me the other night after watching a Nova program about the search for black holes, where the technology was mentioned of using lasers to correct telescope images naturally distorted by looking through the atmosphere.]]> Tornadoboy General Wed, 21 Oct 2009 06:37:28 -0700 http://dev.forums.reprap.org/read.php?1,28808,28808#msg-28808 http://dev.forums.reprap.org/read.php?1,28808,28808#msg-28808 If anyone is interested, I've started documenting my recent attempt at a RepStrap project.

[hensleigh-repstrap.blogspot.com]

Thanks,
JHoff]]> jhoff General Wed, 21 Oct 2009 04:29:39 -0700 http://dev.forums.reprap.org/read.php?1,28789,28789#msg-28789 http://dev.forums.reprap.org/read.php?1,28789,28789#msg-28789
I found that one goal of Mendel is to "Internationalize the software and localize into at least one non-English language".

Just wondering, what should I do if I want to help the software internationalized or localized? Say, to translate the user interface of Reprap Java Host into another language? To "promote" the Reprap to non-English speakers? Yeah I'd like to know some more specific goals/ideas.

I'm an English/Mandarin/Cantonese speaker and I'd love to have more Asians get to know Reprap.

Thanks!


-Bing

=============================
quote

"v2.0: Mendel

•Again, a Cartesian robot from RP parts.
•Print head capable of printing conductive material to create embedded circuits
•Possibly a turntable to do circular prints more easily.
•Expand the online community with a custom website of objects to build.
•Expand parts kits to encompass the whole project from top to bottom.
•Reduce number of external parts needed.
•Internationalize the software and localize into at least one non-English language"]]> BingDai General Sun, 18 Oct 2009 23:26:13 -0700 http://dev.forums.reprap.org/read.php?1,28767,28767#msg-28767 http://dev.forums.reprap.org/read.php?1,28767,28767#msg-28767
I'm working on an open source project with relevance to the RepRap project.

It's called MakerBeam, and it's a miniature version of T-slot, which is used in many larger-scale CNC machines and other machine enclosure/automation purposes. Mini-T is 10x10mm in profile; existing T-slots start at 20x20mm and tend to be proprietary systems.

When we launched this project we had one eye on Cartesian control. I just finished watching the video on Mendel's axis constraints and I'm more convinced than ever that MakerBeam may allow for a simplified RepRap that can print more of its own parts.

Basically the beam is a squared cross section of extruded aluminum with slots running down each of the sides. By printing a slide bearing that fits into the slots, both rotation and skew are effectively constrained. An alternative would be linear ball bearings but in either case you have improved orthogonality and resistance to rotation around the constrained axis.

That's the idea anyway :-) We've raised funds to manufacture the beam and connectors and have started the tooling, and we're planning to make it available to the public in May of 2010. There are a few days left to get on the Beta team, which ships in February.

URLs:

[www.makerbeam.com]

[www.kickstarter.com] This has a lot of our content, including the video

[www.thingiverse.com] Our profile in printable form. Erik de Bruijn has had good luck printing the 1.5 scale version and connecting it together with M3 bolts.

We intend to get a 3d printer, probably a MakerBot, and start building and modifying a Mendel frame to work with MakerBeam. We'll keep the community up to date on this as it happens; nothing is likely to take place before 2010 given our production obligations between now and then.

If anyone feels inspired to get some beam and jump the gun on this, you're more than welcome. Ideally let us know so that we don't duplicate work.

That's it, really. I'm a total beginner to the RepRap project so it may take awhile before I have anything sensible to contribute. But I'll be around.]]> Sam Putman General Sun, 18 Oct 2009 13:00:10 -0700