Author Topic: Anatomy of a CX500 Cdi unit  (Read 5416 times)

Online AshimotoK0

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Re: Anatomy of a CX500 Cdi unit
« Reply #15 on: October 10, 2017, 02:17:36 PM »
Best get to grips with single sided boards first.  Double sided boards are more involved in that to make contact between the two sides, you either need PTH (plated through holes), which are beyond the scope of most hobbyists,  or solder short pieces of wire between the layers.

+1 (there are also some little rivet things you can get to do through hole) Philips used to use them a lot. If you are serious look out for a second hand UV light box on eBay. There are some cheopo ones with UV LED's nowadays ... not tried them but that's not to say they don't work fine.

Mike is right that double sided are a bit more complicated but if you have access to a decent laser printer I can talk you through a fairly painless way of making them. Surprisingly, the double sided photo-etch board isn't that much more expensive relatively than single sided. I also use a dip tinning solution to 'tin' the copper after etching to give much better solderability and corrosion resistance.
« Last Edit: October 10, 2017, 02:30:27 PM by AshimotoK0 »
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Online AshimotoK0

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Re: Anatomy of a CX500 Cdi unit
« Reply #16 on: November 12, 2017, 04:51:16 PM »
Just a couple of components to still arrive & fit but essentially rebuilt with 2017 spec parts and vastly superior spec. CDi capacitors. only bits retained were the Thyristors and thermistors but these were full tested in a separate jig and were fine. Once it's working though, I will investigate alternatives just in case anyone reads this in the future and wants to replace them in their unit.

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« Last Edit: November 12, 2017, 04:53:17 PM by AshimotoK0 »
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline RGP750

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Re: Anatomy of a CX500 Cdi unit
« Reply #17 on: November 12, 2017, 07:09:09 PM »
That is really impressive Ash i'm in awe. :) :)
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Offline Woodside

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Re: Anatomy of a CX500 Cdi unit
« Reply #18 on: November 12, 2017, 07:37:08 PM »
im loving that you are doing this too ash...
are they on side with you over on the cx forum...
i bet they will be when it all works and still looks stock..

Online AshimotoK0

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Re: Anatomy of a CX500 Cdi unit
« Reply #19 on: November 12, 2017, 07:54:04 PM »
im loving that you are doing this too ash...
are they on side with you over on the cx forum...
i bet they will be when it all works and still looks stock..

Mixed blessings Jason  ;D ;D

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« Last Edit: November 12, 2017, 08:03:11 PM by AshimotoK0 »
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline Woodside

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Re: Anatomy of a CX500 Cdi unit
« Reply #20 on: November 12, 2017, 08:07:08 PM »
charming i did read that comment when you first put the link up..i will pop back over and read up see when they eat humble pie
at least you will have another 49700 trouble free miles..
keep going its a worthwhile pursuit...and i for one admire your efforts

Offline SteveD CB500K0

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Re: Anatomy of a CX500 Cdi unit
« Reply #21 on: November 12, 2017, 08:27:17 PM »
21k posts. Should know better.


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Offline Trigger

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Re: Anatomy of a CX500 Cdi unit
« Reply #22 on: November 12, 2017, 09:08:55 PM »
Fail from age.... So why was I fitting new ones to bikes that were less than 2 years old and low mileage units.

Offline K2-K6

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Re: Anatomy of a CX500 Cdi unit
« Reply #23 on: November 12, 2017, 09:14:28 PM »
That is quite a sniffy reply from murrayf. Also appears that he's commenting from habit rather than any real experience.

He quotes age,  then states mileage at 50k when yours has completed 300 miles. Really doesn't seem like a very reasoned view.

Well worth going through it I think and we get the benefit of your skills in this area to inform us too.

All good to me.

Offline mike the bike

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Re: Anatomy of a CX500 Cdi unit
« Reply #24 on: November 12, 2017, 09:38:19 PM »
The potting, as previously discussed,  wasn't always 100% which affects the solder joints due to atmospheric exposure and, over time, capacitors go leaky so it was always going be pot luck if a CDI lasts 50k or 500k.  Upgrading with modern capacitors,  metal film resistors etc, and re potting the pcb properly will make the CDI outlast the bike.
Where's that 10mm socket got to?

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Re: Anatomy of a CX500 Cdi unit
« Reply #25 on: November 13, 2017, 12:38:37 AM »
 ;D ;D ;D ;D ;D

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“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline Woodside

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Re: Anatomy of a CX500 Cdi unit
« Reply #26 on: November 13, 2017, 07:23:14 AM »
as to the potting what will you use to reseal the cdi

Online AshimotoK0

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Re: Anatomy of a CX500 Cdi unit
« Reply #27 on: November 13, 2017, 01:42:32 PM »
as to the potting what will you use to reseal the cdi

Not sure Jason..possibly silicone dielectric gel. I still need to come up with a test rig setup and enclosure. Engine looking really good though so definitely worth all of the effort.
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline Woodside

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Re: Anatomy of a CX500 Cdi unit
« Reply #28 on: November 13, 2017, 01:55:07 PM »
sound good is it this stuff

http://www.google.co.uk/shopping/product/5009981323735501408?lsf=seller:87981,store:8414587908041704960&prds=oid:5468991119695532258&q=magic+gel&hl=en&ei=kaMJWo_yC-KNgAaW6qCoBw&lsft=gclid:EAIaIQobChMI4NvdoNm71wIVypTtCh2uxQDjEAQYASABEgLCn_D_BwE


anyway we use this and can submerge 230v joints pretty much underwater ...
i took apart an underground joint filled with this after 3 years to add some more circuits and it was as good as new...and it was pretty much in a bog

Online AshimotoK0

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Re: Anatomy of a CX500 Cdi unit
« Reply #29 on: November 13, 2017, 04:22:27 PM »
sound good is it this stuff

http://www.google.co.uk/shopping/product/5009981323735501408?lsf=seller:87981,store:8414587908041704960&prds=oid:5468991119695532258&q=magic+gel&hl=en&ei=kaMJWo_yC-KNgAaW6qCoBw&lsft=gclid:EAIaIQobChMI4NvdoNm71wIVypTtCh2uxQDjEAQYASABEgLCn_D_BwE


anyway we use this and can submerge 230v joints pretty much underwater ...
i took apart an underground joint filled with this after 3 years to add some more circuits and it was as good as new...and it was pretty much in a bog

Yes similar but the stuff I have used in the past was made by  Dow Corning.
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

 

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