#garfield Logs

Jun 25 2012

07:14 katsmeow-afk propane is at 600psi at 200F
08:34 katsmeow-afk rue, ya know what might come in handy some day? a plot of psi vs lbs-of-pull on air muscles of different sizes
08:37 katsmeow-afk http://edge.rit.edu/content/P08024/public/Poster%20Publication%20(SD%20II)
08:37 katsmeow-afk it's a pdf, a a cpu hog too
08:39 katsmeow-afk problem is, they didn't list the muscle size
08:47 katsmeow-afk Air muscle contracts when air is pumped in...
08:47 katsmeow-afk According to shadow, a large 30mm diameter air muscle has a pull of 35 kg (about 70 lbs) at 3.5 bar of pressure, which would beabout 50 psi.
08:47 katsmeow-afk 11/4/08
08:51 rue_mohr I posted numbers on the air muscles once
08:52 katsmeow-afk can you do so again?
08:53 katsmeow-afk now *here* is a nice picture : http://www.cnccookbook.com/img/CNCCookbook/Biz/Ads/OldSchoolLathe.jpg
08:53 rue_mohr heh, according to their data, air muscles get better with age
08:57 katsmeow-afk This is accomplished by introducing steam at opposite sides of the rotor and having the nozzles positioned when the vanes are fully extended, taking advantage of the mechanical leverage produced to maximize torque. The present size of this engine using 500 psi of steam pressure would produce over 4000 ft.lb of torque.
09:03 rue_mohr ou notice the plate on the palm is milled
09:04 katsmeow-afk ?
09:04 rue_mohr I'll bet it was milled down from a verry large block
09:07 rue_mohr I'll get a scale sometime and give you a table
09:07 rue_mohr I need to know anyhow
09:08 katsmeow-afk Their use as robot muscles is a new development which began in 1983, soon after the introduction of Firestone's 1M1A, their newest and smallest air spring. The actuators are powered by compressed air via silicone rubber tubes running from a compressor up the interior of one leg. Fine pressure control is achieved by computer-controlled valves
09:08 katsmeow-afk http://cyberneticzoo.com/?tag=pneumatic-muscle
09:08 rue_mohr no
09:09 rue_mohr it was in use at a uni in the mid 60's
09:11 katsmeow-afk ROMAC, THE PNEUMATIC MUSCLE
09:11 katsmeow-afk Actuator pulls 10,000 pounds using 60 psi
09:11 katsmeow-afk A pneumatic actuator based on the principle of the human biceps has come to our attention in the form of a patent disclosure. The ROMAC, under development by MacDonald Detwiller & Associates of Richmond, British Columbia, Canada, works on low-pressure (shop) air and can lift over 200 pounds using 60 psi. The device weighs one pound.
09:12 katsmeow-afk [Source:The Robotics Age Nov 1985 - Edited by Stephanie vL Henkel]
09:12 katsmeow-afk --------------------------------------------------------------------------------
09:12 rue_mohr I'm pretty sure its a function of the tube you use and the weave of the jacket
09:12 katsmeow-afk 1985
09:12 katsmeow-afk why hasn't robotics progressed any futher than it has by now?
09:18 rue_mohr http://en.manu-systems.com/SHADOW-C6ME-kinematics.png
09:18 rue_mohr ah, hmm
09:19 rue_mohr I'v already posted the articles from the 60's and 70's on the pneumatic muslces
09:19 rue_mohr it prolly didn't hit the usa till the 80's
09:21 rue_mohr http://cyberneticzoo.com/?tag=japanese <-- scroll almost half way down
09:22 rue_mohr the bladder ones were created AFTER the air muscles
09:22 rue_mohr and that was 1967-71
09:22 rue_mohr 1967-68 they were using air muscles
09:24 tsmeow-afk
09:24 katsmeow-afk i need to get back onto roof one more time before it's gets damnedhotF
09:25 katsmeow-afk bbiaf
10:05 katsmeow-afk the tomatoe i planted a week ago is still not surfaced
12:18 katsmeow-afk is 29 gigabytes for $100 a good deal? i remember when 64k was $100
21:43 rue_mohr how did the roof work go?
21:46 rue_mohr iamturnip-afk, I see the teletype got featured on the internet
21:46 rue_mohr cool stuff
21:49 iamturnip rue_mohr: link?
21:52 rue_mohr http://torontoist.com/2011/05/strange_technology_at_the_mini_maker_faire/
21:53 rue_mohr wait thats not yours
21:53 rue_mohr stupid google ignoring keywaords
21:53 rue_mohr if a page dosn't have any of the keywords I asked for in it, I dont want it in the search results
21:56 iamturnip ha...well I am sure it will show up eventually
21:57 rue_mohr my table got heavily mixed up with the ubc table
21:57 rue_mohr :/
21:58 rue_mohr http://flickriver.com/photos/brevity/7429579820/
21:58 rue_mohr hahaha
22:07 rue_mohr iamturnip, you mentioned someone interviewed me?
22:57 Tom_itx thankfully that tripped the breaker before it tripped my heart
23:22 katsmeow-afk ??
23:22 katsmeow-afk Tom, what happened?
23:23 Tom_itx working inside the box
23:24 tsmeow-afk works outside the
23:24 Tom_itx i leaned on something i shouldn't have
23:24 Tom_itx blew the breaker
23:24 katsmeow-afk if you shut off power, you can lean on it all
23:24 Tom_itx well i did but the switch leads were right there
23:25 katsmeow-afk things with power on then should be designed to either take leaning ok, or be inpossile to lean on
23:25 Tom_itx bedtime here
23:25 katsmeow-afk that's my working theory, subject to revisiosn