Pirate's random CNC, carbon fiber and electronics fab thread.
03-31-2011, 11:49 AM
#1
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Pirate's random CNC, carbon fiber and electronics fab thread.
It's too bad those profiting off of content provided to their site for free don't appreciate the service.
Last edited by PirateMcFred; 03-12-2012 at 05:36 AM.
04-01-2011, 10:03 AM
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Re: Pirate's random CNC, carbon fiber and electronics fab thread.
I'd be interested in more info on the batteries. Are you using the A123 cells to make them?
04-01-2011, 10:23 AM
#5
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Re: Pirate's random CNC, carbon fiber and electronics fab thread.
is it me, or has the fab forum turned into the free advert forum? i stopped posting up my stuff because it always got removed. what gives?
04-01-2011, 10:43 AM
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Re: Pirate's random CNC, carbon fiber and electronics fab thread.
Although it may not always be the poster's goal when posting, it usually turns into a flea market type thread.
People who respond to threads like this asking for pricing should start sending PMs instead.
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04-01-2011, 02:40 PM
#8
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Re: Pirate's random CNC, carbon fiber and electronics fab thread.
The datalogging that I've done shows that the OEM Honda alternator cuts to 13.8 volts at high load/high RPM and still stays below 14.2 volts at all other times which is well below the max voltage that a 4S pack can handle (14.4v).
My pack ran all last summer with no trouble at all. I had it wired up 4S4P (16 cells), and never had any starting trouble at all, even at Autocross. Total pack weight was 3lbs, including all wiring and heatshrink, etc...
My pack ran all last summer with no trouble at all. I had it wired up 4S4P (16 cells), and never had any starting trouble at all, even at Autocross. Total pack weight was 3lbs, including all wiring and heatshrink, etc...
04-01-2011, 03:25 PM
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Re: Pirate's random CNC, carbon fiber and electronics fab thread.
I've got 2 jobs already, I didn't intend to hawk my wares. I'm sorry if I've offended anyone. I wanted to show some fab of mine is all. I pulled the integers with dollar signs from my posts. I see plenty of welding and nto much else, so I thought I'd post up my little exploits.
-P
-P
04-01-2011, 05:01 PM
#10
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Re: Pirate's random CNC, carbon fiber and electronics fab thread.
Everyone should feel free to post fab work in here without worry of having it taken down. However, I cannot allow sales threads. Also, I would love to see some more work and creativity from you weiRtech. Your work has always been interesting. If anyone has questions, feel free to message me.
04-02-2011, 07:55 PM
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Re: Pirate's random CNC, carbon fiber and electronics fab thread.
Im not flaming but want to know the reason to use that battery style over say optima(other than weight savings) because isn't those types of battery cells very expensive cause i would like to do 1 for my car if the price is right
04-02-2011, 10:09 PM
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Re: Pirate's random CNC, carbon fiber and electronics fab thread.
www.batterycentralmall.com is a good website to go to for the specs on xs power batteries. i have a 1830 weight limit which will be tough to get down to, but i am still going to run a 50lb battery of these 6-8 lb lithium batteries due to the reserve capacity and amp hour rating, not due to cost.
04-04-2011, 10:45 AM
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Re: Pirate's random CNC, carbon fiber and electronics fab thread.
free hp from the 15lb alternator is more beneficial for sure to me.
the cf looks nice! is it prepeg or wet lay up?
the cf looks nice! is it prepeg or wet lay up?
01-04-2012, 10:50 AM
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Re: Pirate's random CNC, carbon fiber and electronics fab thread.
I've come back to this thread a few times and am really pleased to see updates, Awesome work mate.
Any problems with the Li ion batteries after long term use?
Any problems with the Li ion batteries after long term use?
01-04-2012, 02:41 PM
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Re: Pirate's random CNC, carbon fiber and electronics fab thread.
The datalogging that I've done shows that the OEM Honda alternator cuts to 13.8 volts at high load/high RPM and still stays below 14.2 volts at all other times which is well below the max voltage that a 4S pack can handle (14.4v).
My pack ran all last summer with no trouble at all. I had it wired up 4S4P (16 cells), and never had any starting trouble at all, even at Autocross. Total pack weight was 3lbs, including all wiring and heatshrink, etc...
My pack ran all last summer with no trouble at all. I had it wired up 4S4P (16 cells), and never had any starting trouble at all, even at Autocross. Total pack weight was 3lbs, including all wiring and heatshrink, etc...
Very true, but using just 16 cells the max recommend charge current is well under what the Honda alt will output. If your using 2.3ah cells 1c is the recommend charge rate with 3c's been the very max. Thats only 28 amps! You'll be ok providing you don't discharge the battery too much.
In my testing I used 4S5P and wasn't entirely happy.
Back to the thread, how long did it take to do the contour on this picture and what cutter did you use? Excellent finish quality.
http://i44.tinypic.com/33birzt.jpg
01-05-2012, 01:31 AM
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Re: Pirate's random CNC, carbon fiber and electronics fab thread.
Well, they're not Li ion per se. They're the iron phosphate variety and supposedly less of a fire hazard. The 4S3P array's worked like a champ for the last year form -11˚F up to 103˚F. It's a little sluggish when very cold but just crank a little and the current draw warms it up and brings the voltage back up enough to catch it on the 2nd try. If/when this one craps out I'll redesign it for a 20 cell 4S5P for the Prelude. The 8-cell array on the R6 cranks like gangbusters.
You tested an array too? Why weren't you entirely happy?
I don't recall the run time but it wasn't very long. If you really want to know I can look it up later. I used a 3/8" 2-flute carbide emill leaving 3/16" material on the bosses and finished it with a 3/8" ball nose mill for the nice corner radius. Aluminum is very forgiving on speeds/feeds with regard to tool life and finish.
-P
You tested an array too? Why weren't you entirely happy?
I don't recall the run time but it wasn't very long. If you really want to know I can look it up later. I used a 3/8" 2-flute carbide emill leaving 3/16" material on the bosses and finished it with a 3/8" ball nose mill for the nice corner radius. Aluminum is very forgiving on speeds/feeds with regard to tool life and finish.
-P
I tested with an amp meter and charge currents were VERY high if the car had stood for a couple of days/weeks previously. A battery isolator might help with this. My charge currents were well above the advertised rating. I tested some of these cells in another application and they didn't like been overcharged. In a 4S3P you'll be over double the rated current. Maybe your not discharging so much so your not getting the over current when charging.
On the CNC I thought you had used 3 axis and a ball nosed cutter, for some reason I thought the part was much bigger with a bigger radius and a small tool.
Regards
Ricky
03-03-2012, 05:41 PM
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Re: Pirate's random CNC, carbon fiber and electronics fab thread.
That's awesome stuff, Pirate! I would love one of your batteries if you ever feel like selling them 
