CDRom2 Middle Gear Replacement - Washer needed or no? Replacement sources?

[maverick1978]

Hey, folks. Long-time lurker and Turbo List member here. I've been away quite awhile, but am back as I've (finally) gotten around to repairing my TG16 CDs.

I've just swapped my middle gear with an ebay special (totally forgot about Keith's replacement gear here - doh!). Googled the procedure. All methods that I found said just to pull off the middle gear. But, found reference on Console5 about a washer on the middle gear but couldn't get removed and stupidly just snatched off along with the old gear. DOH!

So is that washer really necessary? And if so, what are my options to replace it?

Also, after replacement, my drive is stuck at zero and doesn't spin. Moving the laser assembly doesn't help. I suspect that I need to clean and lube my worm gear and will be doing that next. Anything else that I should be on the look-out for?

[Keith Courage]

yes that little washer is needed if you are replacing the gear with the original style. unfortunately I do not have any spares. maybe someone else here will chime in and set you up with one.

if your drive is not working double check that the large ribbon cable is inserted the correct way. It should be put back in with the contacts facing out away from the center of the drive.

I don't use my two gear solution for repairs on these much anymore. I generally use the original type replacements. I only use the two gear solution for any drives that are missing said washer because that is not needed.

[grache]

Regarding the losing little black ring, I had been suffered for this a long while. Evetually, I am able to find the good replacement.  What I found is Highland Barley paper 0.2mm is able to subsitute the black ring. What I did is cut the paper into circle shape, the use cutter to cut a very small hole in the center. Also, cut circle from the boundry toward to the hole to make the cicrle opened.
 Then try to put the circle back to the axis to see if it fits. If the hole is too small,  you can adjust a little bit until it fits.

For those of you suffer the same issue, and unable to find 0.2 mm or thinner highland barley paper, I can give some to you for free (yes, even you don't buy gears from me )

Just want to share the solution / happiness for finding the replacement.

Thanks
Jimmy

It's hard to find outside of Asia, maybe you could try thick paper?

[maverick1978]

Thanks for the input, guys. Thick paper isn't a bad idea... Perhaps I could get away with some thin cardstock. I tried a small dab of Krazy Glue on a gear, but ended up freezing the whole works. Scratch one of my 3 gears (for 2 drives)

Curious - does the middle gear have to be free-moving? i.e. it's not "glued" to the spindle as the other two gears are?

Mention of using paper as a washer has me wondering if I could get away with setting up a dab of rubber cement or even hot-glue on the spindle without touching the gear, using it to constrain lateral movement of the middle gear along the spindle to a minimum... hmm.

I'll see what I can come up with and report back - thanks again for the input

[Valkyrie]

I've been wondering if I could 3D print replacements with my Makerbot...
Mine's already been replaced with one of Keith's gears (thanks to BlueBMW for that one!), so I don't need it myself.  But I might be able to help people out if I can design one that works well.

[SignOfZeta]

You could, it would probably even work, but I wouldn't count on it lasting very long. 3D printed stuff is hella weak and when the gear is that small the limited resolution of any remotely affordable 3D printer is going to really hurt longevity.

I've been away from the Forum a long time so I have no clue what the state of the art is when it comes to CDROM2 gears. I've heard that the same companies that make hobby resins and such now make cold cast acrylics that might work pretty well. Has anyone tried this? If I had a suitable gear I'd easily be able to make a mold.

[Valkyrie]

I'm not talking about printing a new gear, just the little retaining ring.  FDM printers have nowhere near the resolution needed to print gears that small.

I actually did try making a mold of a new replacement gear a while back.  But the silicone mold rubber I use reacted badly with whatever plastic the gear is made of, and it never cured.  Maybe I could seal it somehow or find a compatible mold rubber, but I never got around to trying either of them.

[choijimmy]

Hi,

 Just pm me your address, I can give free Barley paper 0.2mm for free 

Thanks!
Jimmy

[choijimmy]

Thanks for the input, guys. Thick paper isn't a bad idea... Perhaps I could get away with some thin cardstock. I tried a small dab of Krazy Glue on a gear, but ended up freezing the whole works. Scratch one of my 3 gears (for 2 drives)

Curious - does the middle gear have to be free-moving? i.e. it's not "glued" to the spindle as the other two gears are?

Mention of using paper as a washer has me wondering if I could get away with setting up a dab of rubber cement or even hot-glue on the spindle without touching the gear, using it to constrain lateral movement of the middle gear along the spindle to a minimum... hmm.

I'll see what I can come up with and report back - thanks again for the input

The middle gear must be free moving ( eg, don't glue it with the spindle )

[SignOfZeta]

I'm not talking about printing a new gear, just the little retaining ring.  FDM printers have nowhere near the resolution needed to print gears that small.

I actually did try making a mold of a new replacement gear a while back.  But the silicone mold rubber I use reacted badly with whatever plastic the gear is made of, and it never cured.  Maybe I could seal it somehow or find a compatible mold rubber, but I never got around to trying either of them.

Try shooting some primer over the gear first, I'd recommend Tamiya Ultra Fine. Anything can be cast, even Bigfoot tracks, and Bigfoot doesn't even exist!