Chris Warburton
@warbo active 2 days, 6 hours ago-
Chris Warburton posted an update in the group
RepRap: 7 months, 4 weeks agoI know there’s a meeting scheduled for tonight, but I can’t make it I’m afraid. Been coerced into dog-sitting for someone, quite out of the blue.
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Chris Warburton and
Martyn Eggleton are now friends 9 months, 3 weeks ago
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Chris Warburton posted an update in the group
RepRap: 11 months agoHere’s a link to my Arduino JSON sketch -> http://gitorious.org/arduino-json-client
Setting pin modes and writing digital output works, but I’m not sure about reading values yet (I got some pretty funky output, but that may have been due to my cobbled-together serial-reading console
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Chris Warburton posted a new activity comment: 11 months ago
In reply to: Perry posted an update in the group ShackNet: Great, found this group. Heard about Arduino for a few years, only recently got an ’excuse’ to play with it: building a (bipolar) stepper motor controller for […] ViewI’ve not had much experience with motor controllers yet, all I know is that the Arduino’s pins alone don’t provide enough current to drive them, so they require some indirect control (eg. via a transistor). Sounds like the shield you have should take care of that though, so I can only recommend breadboarding something and seeing what happens.…[Read more]
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Chris Warburton posted a new activity comment: 11 months ago
In reply to: Ryan McClean posted an update in the group RepRap: Hello RepRappers, Do you still meet up once in a while? Ryan ViewIndeed we do! The next meeting is Monday I believe
Due to the amount of cross-membership, and to keep organisation easier, the physical, IRL groups for RepRap and Shacknet (Arduino hacking) have merged into ”Sheffield Hardware Hackers and Makers”. The next meeting’s Monday I believe (see the ”What’s on” box on the left of the GIST Hub homepage) -
Chris Warburton posted an update in the group
ShackNet: 1 year ago ago · updated 11 months, 2 weeks ago agoJust found this Javascript Arduino Uno interface. Not played with it yet though, will have to wait until I get home http://www.schillmania.com/projects/arduino-js/
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Chris Warburton posted a new activity comment: 11 months, 2 weeks ago
In reply to: Chris Warburton posted an update in the group ShackNet: Just found this Javascript Arduino Uno interface. Not played with it yet though, will have to wait until I get home http://www.schillmania.com/projects/arduino-js/ ViewOoo very nice, thanks for this
For my current project I’ve been trying to send JSON back and forth over serial, eg. send ‘{“digitalread”:5, “digitalread”:2, “analoguewrite”: {“pin”:3, “value”:512}}’, get back ‘{“digitalvalue”:{“pin”:5, “value”:1}, “digitalvalue”:{“pin”:2, “value”:0}}’. This quite a high-level thing to…[Read more] -
Chris Warburton posted an update: 12 months ago
Hacking together a quick JSON reader/writer for my Arduino. Probably been done before, but it’s something useful to get back in the swing of this whole Arduino programming lark.
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Chris Warburton posted a new activity comment: 12 months ago
In reply to: Hannah York posted an update in the group RepRap: Just come across this: http://www.mae.cornell.edu/lipson/FactoryAtHome.pdf This report recommends the following actions be taken. 1. Put a personal manufacturing […] ViewHod Lipson’s doing some amazing stuff. Not come across that paper in particular, I’ll give it a read tonight. Loads more at http://creativemachines.cornell.edu/publications . The “Fab@home” ones will probably interest members here, as that’s a similar machine to the RepRap, but it doesn’t attempt to be self-printable. They generally use…[Read more]
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Chris Warburton posted a new activity comment: 1 year ago
In reply to: Chris Warburton posted an update in the group ShackNet: Just found this Javascript Arduino Uno interface. Not played with it yet though, will have to wait until I get home http://www.schillmania.com/projects/arduino-js/ ViewActually, scratch that it also uses Flash, which I don’t allow on my machines
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Chris Warburton posted an update in the group
RepRap: 1 year, 7 months ago ago · updated 1 year, 6 months ago agoFound this earlier, a machine made of LEGO which builds arbitrary objects out of LEGO blocks http://hardware.slashdot.org/story/10/10/20/1348206/A-3D-Lego-Fabricator-Made-of-Lego
What I find so cool about this is that it’s essentially an abstraction layer over a RepRap. Build a RepRap to print LEGO blocks (patents expired ages ago), then build a…[Read more]
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That is way cool.
I did look a bit back but had’nt got around to replying, sorry.
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Chris Warburton posted an update in the group
ShackNet: 1 year, 6 months agoScratch for Arduino: http://smalltalk.cat/blog/Scratch+For+Arduino+(S4A) Scratch is a drag ’n’ drop programming system built on top of Smalltalk. Scratch for Arduino makes Scratch objects representing the Arduino hardware, which can then be arranged into a script. The Arduino runs some custom firmware which communicates with the host PC every 75ms.
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Chris Warburton posted an update in the group
RepRap: 1 year, 8 months ago ago · updated 1 year, 8 months ago agoJust to let the group know, I’ve now got a full time job with ocProducts, so the RepRap will have to move on to something of a backburner. I can’t make it to the lab now, but John doesn’t mind the machine moving temporarily, eg. to the gist lab or access space, if it’ll get working quicker (eg. via some evening tinkering by the RepRap &…[Read more]
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Yup spent the day with it yesterday. The Design of The Darwin Z axis is such that it nicely summs up all the friction of the four lift posts and dumps it on the one stepper motor. I realigned the frame and be yesterday and adjusted some of the tension out of the anti backlash spring assemblies. It seems to run a lot better now but is still in need…[Read more]
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Gratz on the job!
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Chris Warburton joined the group
Java User Group 1 year, 8 months ago -
Chris Warburton posted an update in the group
RepRap: 1 year, 8 months ago ago · updated 1 year, 8 months ago agoPlayed with the RapMan a bit more on Friday. Thanks for the filament Andy! Got the Z axis moving again, but it’s still a bit jerky. The good news is that I’ve tested the extruder and the heater works, the thermistor works (which is the one I was worried about) and the stepper works. The filament goes in fine, but nothing’s coming out of the…[Read more]
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It’s extruding! Turns out the rollers were the wrong way around (I didn’t assemble that part!) so it’s giving out nice tangled plastic squiggles
Now to get it printing test objects -
Wow excellent, well done chris. The worm feed extruder’s are a bit error prone but will get you to the stage of being able to printout a new extruder model. Most folk are going with variants of the Wade geared pinch roller design these days. Looking forward to dropping by on Thursday AM to have a look. Sounds like you are not far of finished…[Read more]
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Actually I take that back this guy is retailing it marginally more cost effectively in the UK. Providing you buy 5Kg.
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Oh forgot to mention. Find a thermometer that will read the temps at the nozzle and check that what you set is what you get. Knowing what the error values (If any) are for a range of temps will help you later. Or at least give you confidence in it’s capabilities.
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Chris see you in the morning at the Uni will be along at about 10:00 ish after breakfast.
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w00t! Good work Chris! Can’t wait to see the results of your first printing
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w00t! Good work Chris! Can’t wait to see the results of your first printing
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w00t! Good work Chris! Can’t wait to see the results of your first printing
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Chris Warburton posted a new activity comment: 1 year, 8 months ago
In reply to: Chris Warburton posted an update in the group RepRap: Played with the RapMan a bit more on Friday. Thanks for the filament Andy! Got the Z axis moving again, but it’s still a bit jerky. The good news is that I’ve […] ViewIt’s extruding! Turns out the rollers were the wrong way around (I didn’t assemble that part!) so it’s giving out nice tangled plastic squiggles
Now to get it printing test objects -
Chris Warburton posted an update in the group
RepRap: 1 year, 9 months ago ago · updated 1 year, 8 months ago agoI love what this guy gets up to! Taken the cheap laser from his DIY laser sintering machine and built a (small) laser cutter using the laser-moving mechanisms from some CD drives as the X, Y & Z axes! http://builders.reprap.org/2010/08/selective-laser-sintering-part-8.html
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Yes they are really cool, a tiny build area but very high resolution. They would be perhaps at their best used as part of a microscope setup. You could use it to image a larger slide area at highest magnification and stitch the images together. Using a cheap USB microscope.
I am not sure who would have a use for that (crystallographers or forgers…[Read more]
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Chris Warburton posted a new activity comment: 1 year, 9 months ago
In reply to: Andy Kirby posted an update in the group RepRap: OK Guys If you want to see what we are heading towards take a look at this. Sound is really recommended. http://tv.onshoulders.org/ I wish I could build machinery […] ViewSaw these in the RepRap blog but didn’t download the videos until I saw this post. Very impressive indeed! Part of me wonders how many takes he really took to get it that seamless
Also, as a feature request, I would appreciate a 25000x speedup button on the next RepRap version 
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Chris Warburton posted an update in the group
Geeks In The Peaks: 1 year, 9 months agoUnfortunately Jo and I can’t make it this time. Shame since we bought a load of camping gear for Bloodstock the other week
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Chris Warburton joined the group
Geeks In The Peaks 1 year, 9 months ago - Load More
Actually, scratch that it also uses Flash, which I don’t allow on my machines
HI, I’ve been looking for something like this as well and so looked at that site and found this mentioned at the top https://github.com/voodootikigod/node-arduino
that is a library for the Node.js javascript webserver for talking to arduino.
Ooo very nice, thanks for this
For my current project I’ve been trying to send JSON back and forth over serial, eg. send ‘{“digitalread”:5, “digitalread”:2, “analoguewrite”: {“pin”:3, “value”:512}}’, get back ‘{“digitalvalue”:{“pin”:5, “value”:1}, “digitalvalue”:{“pin”:2, “value”:0}}’. This quite a high-level thing to…[Read more]