new rotor design

[willib]

i've done some more design work on my ultimate gen rotors ..they are 21.359 " dia..

maybe i'm just dreaming here , maybe not, i've ordered the wire and know where i can get a hub /spindle , anyone know how much it would cost to machine two rotors of the stated dia?? using plate steel about 7/16 thick.?

http://www.otherpower.com/images/scimages/2965/New_rotor.bmp

http://www.otherpower.com/images/scimages/2965/rotor_1.bmp

[maker of toys]

 you might be able to get someone to waterjet or plasma cut those for a reasonable price.

but to machine those with conventional (or even CNC) machines will take a big machine; and time on those doesn't come cheap.  if you can supply the program, it'll be a little cheaper, but the guys that own the machine will still want to charge you to check your code before they run it. . . . downtime and repairs on those suckers is a killer for jobshops trying to compete with the far east.

  maybe check the kind of shop that does custom wheel fab?  the machines that make 22" billet wheels could knock those rotors out pretty fast.

I could probably manage to cut the OD with the manual equipment available to me, but those cutouts would be a pain. (extra setups)  Round cutouts would be simpler to cut on a manual machine.

yours are pretty, though. . .

(7/16 / 11mm  seems a little thin for a disk thats going to be carrying a heavy axial load at the rim . . .)

[willib]

i'll try looking for a custom wheel place ..Thats what i was thinking , using a waterjet machine.you maybe right about the 7/16 dimension. 1/2 " may be better.

[monte350c]

Definitely water jet.

If have access to Autocad, (looks like you are using some type of cad to draw your pics) providing you can make dxf files with the program you can save a little bit of $$.

Locally here I can do up a design and email it to the shop. They use the dxf file directly in the waterjet machine. It has software for cutting paths etc.

Sending the dxf cuts down the machine shop's time and that can save you some money.

Ted.

[dinges]

You're right.

I usually make my plans in ACAD; mail them as .dwg file.

Saves the company some extra work entering the drawing into their systems; they can just 'blow' my drawing to the machine, put on a piece of raw material and start cutting.

I try to take as much work out of their hands as possible, esp. since they charge not their usual price but only material (they usually let it go with another, big order from someone else); saves setup-costs etc.

Perhaps it might be worth to have a talk with your cutting shop and see if they can do it like that? I always state that I have plenty of time, that I don't mind waiting 4-6 weeks; takes the pressure off them, and I still usually get my plates within a week :-)

Peter,

The Netherlands.

[wooferhound]

If you had converted you pictures to .GIF images then they would have been less than 100k each. I was a dialup user once, and they can't see those images without waiting 10's of minutes.

[TomW]

Woof;

Once upon a time there was a thought of the board software or actually maybe just a shell script that either refused those massive .bmp files or converted them on the fly or even after they were uploaded. I predict that after the holidays we will see more huge photos from folks with new 5 terapixle cameras. I guess I have been using computers so long I don't understand why folks don't get it about big picture files. Most 60 to 100 k pics show plenty of detail. A bmp of a line drawing is insanely large for the info. Anyway just chiming in to agree with your comment.

I wonder if there is a web resource that you could upload large files to and it would process them into a .jpg or a .png .gif is proprietary now I guess so cant probably go that route?

If not it might be a good resource for some savvy geek with bandwidth and a webserver to provide.

Cheers.

TomW

[maker of toys]

.gif  and .gif8x are proprietary.  (I remember the angst when compuserve made that known via lawsuit) but that just means that if you write an app that stores information in the .gif format you're required to license the code.  what fee that costs I couldn't tell you (never had the need to license it, not interested enough to search) but there are still .gif generators out there.  (photoshop, others)  

.gif isn't good for photos (max 256 colors) so it's not as popular as it was in the early days, but logos and banner ads still use the format.

[maker of toys]

at least they were linked, not inline. . .  so brownie points for that at least.

but I agree. anything that takes 5 sec to load at 700kbps is going to kill a dial-up user.

[TomW]

Maker;

Yes, good point, I neglected to mention how friendly it was to link them rather than include them. I guess that means some folks are starting to understand the plight of low bandwidth users.

Cheers.

TomW

[zap]

I'd guess that those 5 terapixel cameras are sweet but I'll bet those 512 terabyte Memory Sticks and Secure Digital cards are pricey and hard to come by?   :-)

[nanotech]

Above image is only 69K.









This one is only 63K.




I will NEVER understand when anyone says they cannot convert a .bmp to a .jpg file.  If I remember correctly, every version of Windows from 98SE on has Paint as standard issue.

[paradigmdesign]

well my machine shop charged me $100 for a plain 24' dia. 1/4" thick steel disk!  So it could $300+ easy

[kitno455]

guys, the patents have expired on gif, but png is better anyway.

imagemagick's 'convert' can do  some of this, also bmptopnm | ppmtojpeg or some such. you would have to do this at the time the file was uploaded, and change the name as it got stored. does scoop store the mime type as well? if so, you would have to change that too.

allan

[ghurd]

At least they would do it!

They won't do it here.

G-

[TomW]

Allan;

unlikely the software on the board will get tweaked much.

It would be much easier to just reject anything thats not either .gif .jpg or .png or larger than say 150K but then the mpg etc video would get rejected.

I just convert before posting takes one command. "mogrify -format jpeg blah.ppm" my camera makes your basic 1 meg ppm files for every pic Mogrify stuffs that into a <100K file with plenty of detail for web I use Knoppix so its included in the live CD version [its Linux].

Some folks just will never either get it or care.

Cheers.

TomW