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hoffy
Jan 17, 2009, 3:05 PM
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i am in total agreement and am mad thankful for your consideration of all this.
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adatesman
Jan 18, 2009, 3:14 PM
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rockforlife
Jan 18, 2009, 3:32 PM
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look good to me, lets get building!
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jeremy11
Jan 19, 2009, 4:58 PM
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when I see "homemade CAM competition" the essential ingredient of a CAM is the...... inclusion of a logarithmic cam spiral, which tricams have (although not constant angle) but big bros do not.
I have no problem with allowing BBs in the competition, but maybe change it to Active Pro Competition or something....
or leave it.
after all, making a good BB would be harder than making a forged friend
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adatesman
Jan 19, 2009, 5:31 PM
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kennoyce
Jan 19, 2009, 9:18 PM
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caution thread drift!!!!!!!!
Ok, I'm not sure if this is the best place to ask this or not, but I have made up an excel spreadsheet to give me the x and y coordinates of any logrithmic spiral, but I can't figure out how to import the data into solidworks, I know that you do this, so I was wondering if you could let me know. Thanks.
Now back to the scoring of BB type devices.
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adatesman
Jan 19, 2009, 10:17 PM
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kennoyce
Jan 19, 2009, 10:42 PM
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awesome, thanks for the help.
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hoffy
Jan 20, 2009, 8:38 PM
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it's been a few days since i've checked the thread. the rule changes are fair and i think they now assign points on the overall usefulness of homemade active pro.
thanks for working everything out.
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grover
Jan 23, 2009, 3:14 AM
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Great idea for a contest!!!!!
At first I was like "what-eva" then after I remembered I was unemployed and the snow around here has been lacking, so I got busy.
Finished today and am ready to ship it after a few cosmetic touch-ups.
I'm gonna be a pompous fool and guess me units gonna snap at 40KN.
heh!
(This post was edited by grover on Jan 23, 2009, 3:16 AM)
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EvilMonkey
Jan 24, 2009, 12:45 AM
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there's too much ice in wyoming right now to bother building a cam. why doesn't somebody build an ice screw drill? now that i could use.
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rschap
Jan 27, 2009, 2:47 AM
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kennoyce wrote: caution thread drift!!!!!!!! Ok, I'm not sure if this is the best place to ask this or not, but I have made up an excel spreadsheet to give me the x and y coordinates of any logrithmic spiral, but I can't figure out how to import the data into solidworks, I know that you do this, so I was wondering if you could let me know. Thanks. Now back to the scoring of BB type devices.
Care to share your spread sheet? I'm having trouble with the math (to many years since trig). I'll be drawing mine up in acadd but if I can get (x,y) I can work it out.
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rschap
Jan 27, 2009, 4:19 AM
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You know shortly after I posted this my wife figured out how to set up a spread sheet for ploting the x and y. I think I found the right one when not only is she ok with my insanity she helps me.
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kennoyce
Jan 27, 2009, 10:42 PM
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In reply to: Care to share your spread sheet? I'm having trouble with the math (to many years since trig). I'll be drawing mine up in acadd but if I can get (x,y) I can work it out.
Sorry I didn't see this sooner, as I would be happy to share my spreadsheet with anyone who needs it. If you do just let me know and I can get it to you.
I have it set up so that you can just put in a minimun crack size, and a cam angle and it will do the rest for you, if anyone is interested in it let me know.
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col
Jan 29, 2009, 1:41 AM
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I'm interested, although having spent a total of ten minutes in excel so far, maybe I should try and work it out for myself a little more before asking for help.
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adatesman
Jan 29, 2009, 2:17 AM
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kennoyce
Jan 30, 2009, 3:47 PM
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If you would like a copy, please just pm me with your e-mail address since it is to large to send through the RC.com email.
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adatesman
Jan 30, 2009, 3:57 PM
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wishiwasamonkey
Jan 30, 2009, 4:21 PM
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I will probably enter a cam or two if I can get them built and through customs in time.
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adatesman
Jan 30, 2009, 4:40 PM
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wishiwasamonkey
Jan 30, 2009, 8:45 PM
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I will be going to J-tree in a couple weeks so I might just ship from there. I think it could be faster to wait an extra week and bypass customs.
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rschap
Jan 31, 2009, 1:45 AM
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I just found out about this last Saturday, I wish I had more time to engineer a couple of Ideas I have but I will still get at least 2 cams to you by the end of Feb (I hope). I have made other things but it never occurred to me to build a cam until I saw this competition, Thank You by the way. Other things I’ve made include camhooks, mountaineers axe, ice tools, porta ledge, and a nut tool.
I was wondering about the cables that people use, all the cables I looked at, at the hardware store are only rated to 350lbs for 1/8 and 800lbs for a 3/16 cable. Is that enough or is there better cable out there?
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rc.com
Jan 31, 2009, 2:11 AM
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Usually hardware is marked with the Safe Working Load (SWL) which is often about 1/10 it's break strength.
Where as climbing gear is usually marked with the min. break strength.
IE your 3/16 cable would be about 35kn and your 1/8 would be about 15kn.
(This post was edited by rc.com on Jan 31, 2009, 2:17 AM)
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adatesman
Jan 31, 2009, 8:31 PM
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