The Search for the turbo cd gear

[henrycsc]

OK Guys,
Using Duo_R 's measurements, I made an AutoCAD drawing.



Some stuff I had to ballpark, so we may want to get all the red dimensions confirmed before anyone does any ordering off this drawing!  Also, because the spokes are even on large side / odd on small side, I didn't know if they actually lined up anywhere (I assumed they did).  It probably doesn't matter, but I wanted to point that out too, just in case.

And the 3D rendering:




If anyone wants the CAD file or a .pdf of the dimensions, just PM me your email address.

[Frank_fjs]

Nicely done, Henry.

[chop5]

I'm so close its ridiculous!
The middle gear has those small metal donuts holding it in place,once lifted with a small needle the gear came right off and its axel popped off with a gentle pull with pliers. The gear motor's gear just lifted off with a push up with a screwdriver. The gear in the long worm gear could not be removed so i tried to work around it.



Only problem with that gear is its hole is too wide. I need one just right so I'm searching all over. (busts open alarm clock)


I originally wanted to use a belt drive like this unit:

http://img.photobucket.com/albums/v238/jetbue7/fm2.jpg

but need more parts.

I have a original broken gear removed but no way to measure it. If someone has the equipment i can send it there way.

[henrycsc]

I don't know if a company like this is legit, but found it through a google search:

http://www.alibaba.com/product-gs/338997518/Nylon_Gear_Wheels.html
To get the $0.01 price, you'd probably have to order more than NEC did.  

[Official Ninja]

My plans to make this gear are on hold for now. We had decided to cast the gears and had all the materials ready to order. Problem is I need a gear to make a mold of the gear. I got a cd player that supposedly had the same laser assembly (KS162) but my bad luck was it was a newer revision and had a totally different assembly (KS220).
So, I'll keep checking to get one eventually. Until I get one I cant mold it.

[Twood1130]

My plans to make this gear are on hold for now. We had decided to cast the gears and had all the materials ready to order. Problem is I need a gear to make a mold of the gear.

What were you going to make them out of?

[Official Ninja]

My plans to make this gear are on hold for now. We had decided to cast the gears and had all the materials ready to order. Problem is I need a gear to make a mold of the gear.

What were you going to make them out of?

We have a few different plastics to try. However, im learning that you can find a discman that has the same laser as the turbo-cd drive, but none of them use the same gear drive. So unless I some how come by a gear, I can't make a mold.

I have laid out and drawn the gear in cad/cam. I even made some round blanks on the lathe. I need to invest in a few tools for making a fixture and cutting the part. I just got an excellent duo-r so I don't really have the money / motivation at the moment.
 

[SignOfZeta]

blueraven said he has a gear. You seem to have the know-how. Lets get it done!

[kid_rondeau]

Yeah, I'm with Zeta...this could be huge!!

[Official Ninja]

Well, if anyone would like to let us borrow a gear to make a mold, that would be great. (We being myself and my brother in engineering) We plan to make a mold, cast a gear, test it, cast a few more, and then make a multi gear mold out of more expensive material. This way, with the more expensive mold material, we can cast hundreds before the mold is used up. Of course the disclaimer is the same with anything in the manufacturing process. Things can go wrong, so its a risk to whoever donates the gear. I've seen machine heads dive into work pieces that cost thousands and thousands of dollars. But, I don't see much trouble with molding a little gear.

Here is a pic of the gear all programmed for the CNC machine in our CAD/CAM. If I ever order some small carbide cutters, I'm going to try to cut one someday.

[SignOfZeta]

...that doesn't look right. The teeth are 1/8 the thickness of the gap between them. They should be more or less equal, unless I'm missing something.

[Official Ninja]

...that doesn't look right. The teeth are 1/8 the thickness of the gap between them. They should be more or less equal, unless I'm missing something.

Its hard to see with the angle, and everything is very small, the corner radius are only .002, but your right the pressure angle has to change, thats a rough layout. Going to do that later, layout was to see what tools I need.

[BlueBMW]

Nothing quite like using 0.010" cutters . Speeds and feeds

[kid_rondeau]

All right, hell...
I have a spare TG-CD I'm not using, and the gear is definitely not shredded. Since I want to see this go ahead, I'm willing to offer up my spare so you can extract/mold the offending gear. I believe your method could work.

PM me if you're serious about this and we'll talk.

[BlueBMW]

alternatively.... I gave blueraven a working (albeit not 100%) turbo CD unit.  The gear in it was fine, it was something motherboard causing the unit to require a long warm up time.  If he's through with it, maybe he could offer that one to the chopper.

Is yours fully functional kid_rondeau?