highaltitude.log.20100109

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[16:04] <jcoxon> yay got zeusbot online again
[16:05] <Randomskk> brrr, I'd forgotten how cold cripps court is
[16:05] <jcoxon> Randomskk, hehe, good old selwyn
[16:05] <Randomskk> and I forgot the power and audio cables for my speakers D:
[16:06] <Randomskk> on the other hand, my laser cut plastic from ponoko arrived this morning and now my nixie tube clock case is assembled and actually fits
[16:06] <Randomskk> it's like getting some ikea flatpack, except you designed it yourself and have only yourself to blame if it doesn't fit together
[16:06] <jcoxon> haha
[16:06] <jcoxon> glad its arrived
[16:07] <jcoxon> need to desolder some of the bits off the flight 'puter from CH?
[16:07] <jcoxon> BH?*
[16:07] <jcoxon> damn shift
[16:07] <jcoxon> BH3
[16:08] <Randomskk> did you get it back in full or did the ham strip out just the important bits?
[16:08] <jcoxon> stripped down
[16:08] <Randomskk> and when's the launch? I can now track from cambridge, got my 434 yagi and ic7000 :P
[16:08] <Randomskk> sadly to be totally outdone by the CUSF yagi on an autorotator with their ic7000, pfft
[16:08] <jcoxon> Randomskk, that relies on them setting it up :-p
[16:08] <Randomskk> maybe I could stick my yagi on as well and we can phase them
[16:08] <Randomskk> heh true
[16:09] <jcoxon> ummm asap
[16:09] <jcoxon> but there is quite a bit of work to do
[16:09] <jcoxon> i've got a 'build' weekend next weekend
[16:09] <Randomskk> cool
[16:10] <jcoxon> the plan is to intergrate everything onto the main board
[16:13] <jcoxon> but as nearly everything is already written hopefully it won't be too much work
[16:13] <Randomskk> haha oh man I forgot how fast internet is here, photos are uploading at about one a second
[16:13] <Randomskk> cool
[16:13] <Randomskk> so hopefully this time we will get some actual ballast dumping and floating? :P
[16:13] <jcoxon> thats the plan
[16:14] <Randomskk> http://www.flickr.com/photos/randomskk/4259022595/ woo
[16:14] <Randomskk> cool
[16:14] <Randomskk> well hopefully it will give me something more interesting to listen to than the local cambridge repeater :P
[16:14] <jcoxon> wow nice
[16:14] <Randomskk> need to score a battery for my radio so I can take it outside
[16:14] <SpeedEvil> scrapyard
[16:14] <SpeedEvil> old car bat
[16:14] <SpeedEvil> check volts >12.5
[16:14] <jcoxon> Randomskk, for BH4 we need to be more organise methinks
[16:15] <Randomskk> SpeedEvil: sounds good, just need to get to a scrapyard
[16:15] <Randomskk> jcoxon: yea
[16:15] <Randomskk> like, contact people who live on the flight path beforehand :P
[16:15] <jcoxon> for more organsisation I need to pass on the responsibility to tell the truth
[16:15] <Randomskk> heh
[16:16] <Randomskk> like getting someone who speaks good french if it's passing over france
[16:16] <jcoxon> yeah i can use Alex for that
[16:16] <jcoxon> well i'll email round the list and request help
[16:16] <jcoxon> so i can focus on the payload
[16:16] <Randomskk> yup
[16:16] <jcoxon> i'm aiming for 5/6/7 of feb methinks
[16:16] <Randomskk> okay, cool
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[16:19] <jcoxon> haha all the componets smell of alcohol
[16:20] <Randomskk> is that because they landed in france, or..? :P
[16:21] <jcoxon> or the 1/2L of ethanol onboard :-p
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[16:25] <edmoore> jonsowman: buspirates are here
[16:26] <jcoxon> hey edmoore
[16:26] <edmoore> hi jcoxon
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[16:26] <edmoore> all well?
[16:26] <russss> I got mine too
[16:26] <edmoore> cool
[16:26] <russss> there are 3 for sale if anyone wants one (I have USB cables but not probe cables)
[16:26] <edmoore> came w/o usb cables
[16:26] <edmoore> that annoys me
[16:26] <russss> yeah you had to order them separately
[16:27] <edmoore> the assumption that everyone has usb cables lying around therefore we needn't include one with our product is now invalid i think, thanks to precisely that attitude
[16:27] <russss> heh
[16:27] <jcoxon> edmoore, yes thanks, have the parts from BH3 in front of me
[16:27] <edmoore> cool
[16:28] <edmoore> has it survived transit?
[16:28] <jcoxon> yes
[16:28] <jcoxon> very much so
[16:28] <Randomskk> hey edmoore
[16:28] <jcoxon> the socket for the beacon is broken
[16:28] <jcoxon> but thats about it
[16:28] <edmoore> hi Randomskk
[16:29] <Randomskk> woo back in cambridge
[16:29] <Randomskk> edmoore: radio set up :P also check it out, the case for my nixie clock got laser cut and arrived this morning http://www.flickr.com/photos/randomskk/4259022595/
[16:29] <edmoore> not that exciting is it?
[16:29] <edmoore> very nice
[16:30] <Randomskk> lol no
[16:30] <Randomskk> brought my 434 yagi along too though which will hopefully render some more excitement
[16:30] <Randomskk> except when the cusf autotracker is set up and outclasses it :P
[16:30] <edmoore> you could make 4 identical yagis for the tracker if you want
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[16:31] <Randomskk> it would be fun to try
[16:31] <edmoore> not sure there's really the time for that kind of manual labour during term though
[16:31] <Randomskk> power tools in engineering workshop would quarter the time it takes
[16:35] <jcoxon> so when does Cam restsrt?
[16:36] <Randomskk> technically term starts tuesday
[16:36] <edmoore> lectures on thurs
[16:36] <Randomskk> lectures etc won't start until thursday
[16:36] <Randomskk> you know, the start of the week. thursday.
[16:36] <edmoore> technical milestone report to be handed in by then too, which is me all set for the next few days
[16:36] <Randomskk> lol cambridge
[16:36] <Randomskk> edmoore: heh
[16:36] <jcoxon> yeah i remember the stupid week system
[16:36] <jcoxon> quite early for cambridge this year
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[16:42] <jcoxon> oh edmoore this week i'm going to work on a 'template' for contact details to be put on payloads
[16:43] <jcoxon> contact details onside and an explanation on the other in a few languages
[16:43] <edmoore> cool
[16:43] <jcoxon> oneside*
[16:43] <jcoxon> was suggested by teh french hams
[16:45] <SpeedEvil> http://www.cs.cmu.edu/~sprite/mhifoe.html suggestions
[16:46] <jcoxon> perfect :-p
[16:50] <Randomskk> hmm
[16:51] <Randomskk> in lieu of speakers I will just use my ic7000 and tune to broadcast fm
[17:47] <edmoore> Randomskk: I did that for most of the summer in our work room
[17:48] <edmoore> just tuned to radio 4
[17:48] <edmoore> it's broadcast mono anyway
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[21:26] <Laurenceb> hello
[21:26] <Laurenceb> Randomskk: nice, how much does that cutting cost?
[21:35] <Laurenceb> I'd probably have tried this http://www.screwfix.com/prods/20397/Power-Tools/Benchtop-Woodworking/Titan-SF16G-406mm-Scroll-Saw
[21:35] <Laurenceb> with an abrafile
[21:35] <edmoore> i don't like those machines at all
[21:36] <edmoore> their tolerances just aren't up to fine work
[21:37] <SpeedEvil> you can do really good tollerances with a file
[21:37] <edmoore> and getting non-retarded blades for them is tricky. the stock ones just like throwing your workpiece around and ripping clumps out of it in the process
[21:37] <SpeedEvil> of course - that would be tricky to do
[21:37] <edmoore> a file in the hands of a toolmaker is quite something. but as ever, a fool with a good tool is still a fool
[21:37] <Laurenceb> edmoore: yeah - they can be annoying
[21:38] <Laurenceb> I used to have one with some abrafile blades
[21:38] <SpeedEvil> having said that - I've done similar to the above using a dremel, fixed in a little table-type thing.
[21:38] <Laurenceb> not sure how tricky itd be to put together a similar setup with that cheap screwfix one
[21:38] <SpeedEvil> with lots of coolant
[21:39] <SpeedEvil> and a little router bit type thing
[21:39] <edmoore> if you're going to get that thing, really do yourself a favour and save up a bit more for a bandsaw
[21:39] <SpeedEvil> A scrollsaw and a bandsaw are for _totally_ different things
[21:39] <Laurenceb> edmoore: for doing complex cuts a bandsaw istn always possible
[21:40] <SpeedEvil> A scrollsaw is often where you might be cutting on a bit of wood for an hour - and one cut will ruin it
[21:41] <edmoore> I've always had better results by roughing something with a fine bandsaw and then filing. if i need to get the blade through a hole, I use a hack saw.
[21:41] <SpeedEvil> If you're doing more than - typically - 5mm thick bits, you're misusing it.
[21:41] <Laurenceb> hack saw is inprecise and bandsaw you cant turn
[21:42] <edmoore> a hacksaw is no less precise than a scroll saw
[21:42] <Laurenceb> if you take long enough...
[21:42] <Laurenceb> scroll saw you can make jigs for alignment
[21:42] <edmoore> you can use them same blade styles, and you can also modulate your force and feed as appropriate
[21:42] <Laurenceb> and chuck out cut parts to high precision fast
[21:43] <edmoore> i will concede speed
[21:43] <Laurenceb> hack saw for something complex and you will be there all day
[21:43] <edmoore> but you can get alignment jigs for hacksawys too
[21:43] <Laurenceb> I guess
[21:46] <Laurenceb> http://www.tinytools.co.uk/Saws_&_Saw_Blades-Olson_Scroll_Saw_Blades/c84_116/p1726/Olson_Spiral_Scrollsaw_Blades/product_info.html
[21:47] <Laurenceb> "saw in all directions and have 360º cutting capability. Excellent for 0º radius scroll/fret work - you never have to turn the workpiece"
[21:48] <edmoore> sorry to be a grump about scroll saws
[21:48] <edmoore> but those blades are awful
[21:49] <edmoore> for the record, my dislike of scrollsaws was taught to me when i worked in a machinists for beer money in my mid teens. they are seen as being up there with adjustable spanners
[21:49] <edmoore> ie the work of the devil
[21:49] <edmoore> so the cutting surface of those spiral blades has a really poor geometry (in terms of cutting rake) to cut efficiently.
[21:50] <SpeedEvil> And you tell kids today that you ever saw a machinist, and they won't believe you!
[21:50] <edmoore> you may not loose any sleep over if if you're cutting roughly through some 3mm plywood, but if you take it near acrylic you'll end up with shattered shards everywhere unless you're not careful
[21:51] <edmoore> unless you're *very* careful, that should read
[21:51] <edmoore> I was a machinist! at least that was my job title. you couldn't cool me a toolmaker, that's for sure, but i'm still pretty handy at turning
[21:52] <SpeedEvil> I have a metal lathe that's sort-of-broken.
[21:52] <SpeedEvil> the chuck is ~2-3 degrees off axis
[21:52] <edmoore> er
[21:52] <edmoore> yes, that's broken :p
[21:53] <SpeedEvil> and it's been reworked into a woodworking lathe somewhat
[21:53] <SpeedEvil> I need to pull the chuck off and see if I can do anything about it.
[21:53] <edmoore> which bit in the headstock is the cause of the bentness?
[21:53] <SpeedEvil> it describes a cone
[21:53] <SpeedEvil> so I assume the spindle
[21:54] <edmoore> it could be the mounting plate on the chuck itself
[21:54] <SpeedEvil> don't think so - the chuck body wanders
[21:54] <edmoore> i wonder if you could fix that in a fairly viscous way
[21:55] <SpeedEvil> I suspect that's what's going to have to happen
[21:55] <edmoore> mount a bearing to the toolpost that presses against the chuck
[21:55] <edmoore> set the rpms down very low
[21:55] <SpeedEvil> no toolpost
[21:55] <edmoore> and very carefully, bit by bit, feed it towards the chuck, forcing any eccentricities out
[21:55] <edmoore> oh
[21:56] <SpeedEvil> It's basically the bed - and little more.
[21:56] <edmoore> what lathe is it?
[21:56] <edmoore> ie model
[21:56] <SpeedEvil> I'd need to do a hell of a lot to it to get it into a state where it can cut metal sanely.
[21:56] <SpeedEvil> Name/maker escapes me.
[21:56] <SpeedEvil> ~4 foot bed, _very_ heavy.
[21:56] <edmoore> wow, sizeable then
[21:57] <SpeedEvil> huge cast iron frame
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[23:56] <juxta> morning all
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[00:00] --- Sun Jan 10 2010