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Guys,
There are only two or three things you need to compete with thingiverse ( the incumbent) as a startup:
1 - give the same or better "experience".
2 - give people a reason to change.
3 - make the change so easy they don't even have to try.
4 - be dynamic/vibrant/agile or at least appear that way. :-)
Here's the steps I'd take, if it were me ( and who's to say its not ... ) :
1 - devel
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buzz
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General
change your skeinforge or sfact settings to enable "raft", and then look at the other settings on that tab. :-)
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buzz
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RepRap Host
Not to be a pedant, but the 'JunkStrap' is actually a derivative of the original Darwin, not the McWire.
Thanks,
Buzz.
( I was the first to use the JunkStrap title, I think.).
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buzz
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General
Just checking, but is the SDA/SCL -> D9/D10 still needed in the latest reprap firmware when using Gen3 electronics? I went looking for more details of it in the website, and was unable to locate anything anout it in the wiki, so I'm thinking it's been superseded by a firmware update that avoids it?
Buzz.
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buzz
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Firmware - mainstream and related support
If using the USB connectivity to the Arduino, there are USB-host-protocol related delays of up to 25 milliseconds that would prevent the system you proposed from working real-time unless it has significant onboard buffering ( eg with a SD card, or some Ram or something ) to pre-buffer the upcoming commands prior to sending them to the microcontroller.
Like nophead said, this is quite do-able
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buzz
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Controllers
Yes, you are correct:
* circuits are all DC. ( apart from the PC power supply, who's job it is to take AC, and supply the rest of the circuits with DC).
* All the core parts of the electronics are TTL digital ( which means they run at 5V DC ). THe stepper drivers allow this 5VDC digital signal to driver the stepper motors with a much higher voltage DC digital signal ( 12 v or higher ).
* The
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buzz
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Controllers
I am currently doing this ( toshiba tb6560 chinese 4 channel stepper board + Arduino Mega), and the only issues I'm hitting are:
* don't exceed 20-25volts-ish despite the board saying it's rated to 36, it's not! it's known to regularly die at 30ish with smoke! I've been running at 12 or 18v and both seem OK so far.
* Documentation on the pinout of the DB25 ( normally for the parallel port, b
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buzz
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Controllers
For example, I've recently ( this week ) connected a "DFRduino Mega" ( a Mega "clone") to a chinese manufactured 4 channel "Stepper controller board" from ebay ( 4 channels are for X,Y,Z and extruder ). It also has a "relay" channel designed for turning on/of a spindle in a milling scenario that works beautifully for driving the heater element of the extruder. the only other electronics I h
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buzz
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Next Wave Electronics Working Group
I've added botmill.com and techzonecom.com and flemingcnc.com as "almost-Mendel" items to the Mendel_Buyers_Guide page of the wiki because it's easy. I'm not saying I have any knowledge of any of them or their product/s, but it was easier to edit the wiki that it was to write this email. ( both were trivial).
:-)
Buzz.
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buzz
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General
The "blog of blogs" suffers from the following:
1 - Yahoo platform deficiencies ( eg it crashes 1 in every 3 times I use the "save" button ).
2 - Management deficiencies ( while trying to work around the above point, I've been known to accidentally screw stuff up).
3 - Blog platform deficiencies ( if each blog takes a fraction of a sec to refresh, and we have 92 sources , it's easy to exceed the
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buzz
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General
Your endstop/s may be misconfigured, resulting in the Sanguino preventing it from doing anything.
The temperature probe may be misconfigured, ( eg set as a thermocouple instead of a thermistor ), resulting in it refusing to start the extruder until it's corrected?
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buzz
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Sanguino(lolu)
AgeingHippy:
Trying to answer your question at a "high level"
There are essentially a few key parts:
1 - the main Arduino(Sanguino) CPU on the motherboard ( which is responsible for converting GCODE instructions into stepper motor step/direction information for 3 steppers on X, Y, and Z, AND the stepper driver on the "extruder".
2 - the "extruder controller" which is connected to the above CP
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buzz
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Controllers
Suggestion: how about you just do what you've done in the forum, which is to take a picture of the formule, and upload that to the wiki page, and embwd the image. the end-users get the same result, which is that they can see you formula. :-)
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buzz
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Administration, Announcements, Policy
Here in Brisbane.... I ( and the local Hackerspace ) used RS components for the BZP metric threaded rod ( Bunnings Galvanized stuff was the backup plan, as it was often too bent at my local Bunnings). for the Steel Rod, we also went with Imperial Stainless Rod ( 7.96mm Vs 8mm is definitely close enough in this case).
here's our progress as at two weeks ago:
Buzz.
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buzz
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General
Marcus,
I'm not trying to be rude... but are you suggesting that Toyota have no idea what they are doing because all the after-market add-ons and improvements never make it back into the mainstream product?
Perhaps it's just the testing and quality-control required of the parts that make it into the main-stream product takes many, many more man-hours to undergo than it does to upload a suppo
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buzz
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Plastic Extruder Working Group
I assume your prices are in USD?
So a fully populated board is: $25
An unpopulated PCB and all components for self-assembly is: $4+$15.50 = $19.50
what payment methods do you accept?
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buzz
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For Sale
..oh, yes, don't forget that despite being commercialized by Makerbot the "Cupcake CNC" IS a RepStrap, and a very capable and documented one.
I'd probably say its more documented and is definitely more capable than the McWire, so I'd even go so far as to say the Link that Zach put in there was an accurate representation of the Evolution of popular repStrap/s.
If you want to build one "fro
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buzz
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Administration, Announcements, Policy
NOw that this has been brought to my attention, I have removed the commercial link from that page, and added a link to the 'objects' page, so users can get further info on it.
Given that Zach wrote the entire original mcwire page from revision 1.1 through 1.15, I don't have a problem with leaving it at that. He's been much more of an asset to the Reprap that many people realise. Makerbot are
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buzz
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Administration, Announcements, Policy
I'd like to remind you all that traditional baud rates 9600/19200/57600/115200 are NOT optimal for an arduino, and require extra code in the core libraries to handle it.
If you have a look at the arduinoscope/macduinoscope project by gabebear ( see ) he says he is able to get up to ~1.6Mbit throughput streaming data from the arduino through the USB to the host with just 0.05% data loss or less
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buzz
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Firmware - experimental, borrowed, and future
As a new 'core' reprap team member, I can say I'm really happy that Makerbot ( among others) is giving a turn-key solution to the electronics for people that want/need it. Personally I'm not using any makerbot electronics at all. ( Arduino Mega with gen2 DC drivers from rrrf.org and my own weird stepper drivers from a local supplier. )
If you don't like makerbots success, feel free to downl
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buzz
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Next Wave Electronics Working Group
I believe mediawiki has an experimental WYSIWYG plugin for editing. maybe this should be considered for the reprap mediawiki instalation. ? using wiki syntax is so retro.
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buzz
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Administration, Announcements, Policy
reprap has a strong history with polymorph. it was one of the first plastic/s that was considered ( after hot-glue , I think). There were serious problems with polymorph, which I think included it's shrinkage properties, and possibly the fact that it broke-down under temperature. I've not personally tried extruding it.
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buzz
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General Mendel Topics
I sourced mine from NZ, as the prices in australia ( the suppliers I found ) were ridiculous, and even after paying the exchange rate, and the shipping, and the import duties it was still cheaper from NZ. I'd also suggest makerbot as a good supplier.
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buzz
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Australia, Brisbane RepRap User Group
Deano, I sugest you join the Brisbane Hackerspace ( email list and first few attendances are free ), and come to a meeting I'm at. I have a repstrap that ( apart from minor repairs ) is pretty functional, and would be happy to show it to you and discuss how I built it, etc.
Buzz.
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buzz
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For Sale
goinreverse: I heartily encourage you to put your "fool proof" mcwire build steps into the objects.reprap.org wiki ( which is soon to be the main wiki ), and once the wiki-merge is complete these cna then form part of the "Which reprap is right for you?" page.
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buzz
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Administration, Announcements, Policy
I don't know phorum, but assuming it's php, it shouldn't be hard to do something like this to the page output, just before it's rendered to the user:
// supports these link formats:
// [] or
// []
// []
$Pattern="/\[\[(\\w+?(\\w+)\\|?([^]]*)\\]\\]/im";
if (preg_match_all ( $Pattern, $pgText, $colMatches,PREG_SET_ORDER))
{
//print "";
//print_r($colMatche
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buzz
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Administration, Announcements, Policy
I think a lot of the user suffering is currently coming from these small ( and relatively fixable) issues:
Issue 1 - main twiki isn't publically editable, so people use the 'objects' mediawiki for content they would like to publish.
Issue 2 - the two wikis then disagree, and there is a lack of wikigroomers/wikicleanup happening on the main wiki ( I'm sure it's happening, just not fast enough
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buzz
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Administration, Announcements, Policy
if htere is already a SMT one on your board, there is no point solding a separate sanguino one in as well. this is for those that had a sanguino and wanted to re-purpose it into an enpty motherboard PCB.
THe solder points are also a very convenient location for ad-hock connections to the pins for (eg) adding a LED to a pin to ensure your login is *REALLY* working.
Buzz.
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buzz
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Controllers
the oly real difference between the mega and the others is the pin layout/s, and even these are minor changes, so if yo are willing to encounter a few "minor hassles" figuring it out, feel free to use the standard firmware, and just tweak it to suit yourself.
Buzz.
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buzz
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Controllers
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