#garfield Logs

Jun 21 2015

15:16 any88938701 it's only 2000 sq ft of floor space up there i cannot use (counting the bathroom and kitchen)
15:58 any88938701 ok, 15amps base current is a bit much, even for me
16:15 any88938701 i wonder why the Chinese don't sell isolated buck "transformer" modules, it's only a matter of an optocopler and 2nd winding on the toroid
16:51 any88938701 Item location:
16:51 any88938701 Langley, British Columbia, Canada
16:51 any88938701 and it's 30 days shipping??
16:52 any88938701 This item will ship from China.Please make sure you accept that before you buy.Thanks.
16:55 any88938701 Tom : http://www.ebay.com/itm/5pcs-LM2596S-DC-DC-Buck-Converter-Adjustable-Power-Supply-Step-Down-Module-US-/191521008762 <<== usa shipper , free s&h , $8.09 for 5 = $1.62 each
16:57 any88938701 http://www.ebay.com/itm/10-pcs-DC-DC-LM2596-Step-Down-Adjustable-Converter-Power-Supply-Module1-3V-35V/301120877446 <<== usa shipper, $12 for 10 psu , free s&h
16:58 any88938701 2amp
17:19 any88938701 i wonder how hard it would be to mod one of those to have an external Vref, so i can set Vout with an opamp
17:46 any88938701 i just cheated a current sink using 8 transistors, a LM317, a $1.20 switcher psu module, a $7 dvm module
17:47 any88938701 it is good for over 300v
17:47 any88938701 ratings:
17:47 any88938701 8a @ 160v (5a @ 120vac)
17:47 any88938701 16a @ 100vdc
17:47 any88938701 28a @ 60vdc
17:48 any88938701 40a @ anything under 40vdc
17:48 any88938701 still need to find a way to mod the switcher to allow external feedback
17:49 any88938701 the LM317 is only to protect the inputs to the switchers
17:50 any88938701 800ma @ 300vdc
17:51 any88938701 oh, and 8 emitter resistors
17:53 any88938701 thermal limiting due to small heatsinks will be the limiting factor
18:44 any88938701 ...
18:57 rue_shop2 I'm back again
19:08 rue_shop2 http://watch.discoverychannel.ca/daily-planet/april-2012/daily-planet---april-30-2012/#clip669397
19:12 Tom_itx ?
19:13 Tom_itx rue_shop2 did you have class yesterday?
19:39 any88938701 ...
21:20 rue_shop3 yup
21:20 rue_shop3 I made almost half of one of the mecha fingers today
21:23 Tom_itx what are they learning about now?
22:27 rue_house only 1 showed, we played with the cut-n-nut
22:27 rue_house the open ended stuff isn't panning out too well
23:07 any06632188 the tv series "Dark Matter" began this month this year, filmed in Canadia, and has a gynoid they keep calling android, the gynoid links to the ship same as Andromeda does, but is a standalone robot, and isn't a hologram or a slave of the ship
23:07 rue_house !
23:07 rue_house I have an image for you
23:09 rue_house arg, for shame
23:09 rue_house I'v not worked on the mecha since 2012
23:09 any06632188 S01E01 was june 12, E02 aired the 19th, so i am guessing it's a friday show on some network somewhere
23:10 y06632188 wonders for a moment who rue is speaking to, but Tom is here and the only person he'd be talkin
23:10 any06632188 my outside tank is a deep green now, already
23:10 rue_house you
23:10 rue_house algee is supposed to be good for you
23:10 rue_house high in the colour green
23:11 rue_house http://ruemohr.org/~ircjunk/robots/sparrow1/p1070308.jpg
23:11 rue_house arg, 3 years, thats just not cool
23:12 rue_house kat, what do you think?
23:12 rue_house oh you cant much see the good stuff
23:13 rue_house there are 1/2" bushings around the pins, welded to the ends of the inner pipes
23:13 rue_house I suppose an image of it curled up from the side would have been wise
23:13 any06632188 holeycarp at the lag
23:13 any06632188 [any06632188 PING reply]: 1min 24secs
23:13 any06632188 [rue_house PING reply]: 12 secs
23:13 any06632188 it's got too much frog pee in it for my sensitive pallate
23:13 any06632188 please tell me you didn't make hinge from 1mm wall aluminum
23:14 rue_house no its all steel
23:14 rue_house I was going to craft some foam and cast the joints, but I thought the steel would be better
23:15 any13190281 that's better
23:15 any13190281 [22:51] <rue_house> I suppose an image of it curled up from the side would have been wise
23:15 any13190281 [22:52] <any06632188> but the outer sq tube are not bushed, it's going to wear out in one busy afternoon
23:15 any13190281 [22:52] <any06632188> [any06632188 PING reply]: 2mins 46secs
23:15 rue_house yea, I'm thinking on that, I'm wondering if I should just lock the pin to that segment
23:16 any13190281 that would help
23:18 any13190281 i pinged out 4 minutes ago
23:19 rue_house I welded an old vise that broke, I'll go easy on it and see how long it lasts
23:19 any13190281 cast iron old? depends on where it broke = won;t last
23:22 any13190281 the weld bead will unseat from the cast iron under tension
23:23 any13190281 if the base and screw are still good, you can make up a new steel part
23:28 any13190281 .............
23:30 rue_house reading...
23:30 rue_house yes, cast iron
23:30 rue_house what I do with cast, is to run hot and spread out the pool at much as I can, across and down
23:31 rue_house get as much area into the piece as I can
23:31 rue_house and I dont expect much
23:31 y13190281
23:32 any13190281 i wonder if you can preheat it on top of the alum smelter
23:33 any13190281 or if that will help any
23:33 rue_house I din't think of being nice to it as it cooled
23:33 rue_house i let it cool slow
23:34 y13190281
23:35 rue_house when I was grinding in the V I noticed a huge casting flaw in it
23:35 rue_house surprised it didn't break sooner
23:35 any13190281 tomorrow, if as hot as it was today, i will punch a hole and run some 7" duct tween this room (with air conditioner) to the bedroom (minus air conditioner)
23:36 rue_house bets this year looks like kids play compared to next year
23:37 any13190281 hallway tween the walk-in and regular closets of these two bedrooms, ~7ft apart, hole in the back wall of each, 6.5" whisper fan at duct opening in this rooom
23:37 any13190281 yea,, it's totally pissing me off that i don't have free a/c becuse of dogs
23:39 rue_house hmm $60 for a 6"x11.5" piece of 1.25" plate
23:39 any13190281 that's high,, you buying it new and paying them to cut it too?
23:39 rue_house its a "bed plate" for a press
23:39 rue_house 20 ton, 250psi
23:40 rue_house D=...
23:40 rue_house 160"^2
23:40 rue_house circle -a 160
23:40 rue_house Radius is : 7.136497
23:40 rue_house Diameter is: 14.272993
23:40 rue_house Circumfrence is : 44.839931
23:40 rue_house Area is : 160.000000
23:40 rue_house Sphere area: 640.000000
23:40 rue_house Sphere volume: 1522.452637
23:40 rue_house 14" piston, hmm
23:41 any13190281 got any companies that repair mining or logging or shipping nearby? someone there will give it to you for beer money
23:41 rue_house not built the press yet
23:41 rue_house designing
23:41 any13190281 oh,, then design it to use cheaper parts :-)
23:41 rue_house I'm scraping the design from an ad
23:42 rue_house https://s-media-cache-ak0.pinimg.com/originals/b6/f5/81/b6f581b04945b4090423e9894e36bcd4.jpg
23:42 rue_house I can damn near count the peices
23:43 y13190281 recommends a $60 12vdc winch from ebay, and you make some pulleys on your lathe for supercheap, and each paralallel cable run is an additional ton of pull or
23:43 any13190281 i made a 6ft stroke 2ton with a winch, worked great, no hydraulics to botehr with
23:44 any13190281 drilling all those holes will be 1) a bitch because the backside of that flange is tapers, or 2) pricey
23:46 any13190281 you can get fairly small 4ton chain, get beefier 8ton , use 4 strands
23:46 rue_house aha, 59" high, 25" wide
23:46 any13190281 it's a harbor freight classis import
23:46 any13190281 classic
23:46 any13190281 they don;t sell it any more, afaik
23:46 rue_house I have a buddy with a DRILL PRESS, not like a regular one, a verry industrial one
23:47 any13190281 too easy for the pressing piece to cant and blow the part to the side
23:47 any13190281 k, if the holes are not in the exact same place on each side of the upright, the table will not be even
23:48 any13190281 i have some 3" acme square-thread allthread i may use
23:48 rue_house carefull init layout and some predrilling
23:49 rue_house http://www.edwardsironworkers.com/images/jpg/20tonSP_ds.jpg
23:49 rue_house I like the attributes of this one
23:49 rue_house I need a from-the-floor version tho
23:49 any13190281 but i'll still go with 12vdc, then adding force is merely a matter of how many cables over the pulleys
23:49 any13190281 note 20tonSP_ds.jpg is a tilt-table
23:50 any13190281 or *can* be
23:50 rue_house trying to work out what size that channel is
23:50 any13190281 on the 1st pic?
23:50 rue_house 4"x1.5"?
23:50 rue_house yea
23:51 any13190281 technically, that's not extruded channel, it's formed plate
23:51 any13190281 my guess would be 4 wide x 2
23:51 rue_house yea, I saw a pic of a failed one
23:51 any13190281 using 1" pins
23:51 rue_house its prolly all 4x2 then
23:52 any13190281 you can get H-beam cheaper than having someone form you those, H-beam has flat flanges, I-beams are tapered inside
23:52 rue_house ! I could do folding in a press!
23:52 rue_house why dont I just use U channel?
23:52 any13190281 drilling thru a taper can really teash a drill bit
23:53 rue_house hmm
23:53 any13190281 you can fold 6ft long 3/8 plate?
23:53 rue_house so 4x4 I beam?
23:53 any13190281 H beam
23:53 rue_house ...
23:53 any13190281 H != I
23:53 rue_house yea, I'm thinking
23:54 any13190281 https://duckduckgo.com/?q=%22h+beam%22&ia=images <<== no tapers on the flanges of the real H beams
23:55 rue_house ok
23:55 any13190281 I beam : http://www.teinertmetalsinc.com/images/ibeamdiagram.jpg
23:56 any13190281 99.999% of humans don't give a rats behind about the difefrence, but if you call and ask for I beam, you won;t get an aH beam'
23:56 any13190281 if they cut it for you , you bought it
23:56 rue_house ohj I understand
23:57 rue_house I'm now trying to come up with a design that dosn't have feature runaway
23:57 rue_house 22/25" seems quite wide enough for me
23:58 rue_house I wonder if I can come up with a material list now