Author Topic: Douglas Dragonfly make a Switch contact tab  (Read 122 times)

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Offline BrmBrm

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Douglas Dragonfly make a Switch contact tab
« on: 10 Jan 2019 at 19:20 »
Next phase of the Dragonfly switch replacement. A contact tab.

I need to make the contact tab that goes onto the switch mounting stud.
That is the one that would be contact number 9.
On the circular central switch area there are different contact bands.
Which of these should contact 9 bear against?
It presumably fits on the stud under the nut?
What shape should it be?
Like one of the other contact tabs?
Any help appreciated
Many thanks.
« Last Edit: 11 Jan 2019 at 08:09 by BrmBrm »

Offline andy1303

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Re: Douglas Dragonfly make a Switch contact tab
« Reply #1 on: 13 Jan 2019 at 19:33 »
I had a look on my bike today, and while it was obscured by the rest of the switch, it looked like there was a crimp ring terminal on the switch and I think it was on position 9. Mine was one of the awful blue insulated crimp variety, but I'll probably replace it with a proper brass ring terminal at some point. Would that be what you're looking for?

Andy

Offline Red

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Re: Douglas Dragonfly make a Switch contact tab
« Reply #2 on: Yesterday at 11:43 »
Hi Brm

Terminal 9 is connected to the resitor for the ignition warning light in the Miller ammeter. On my Dragonfly I don't have the Miller ammeter or the ignition warning light so I disregarded this connection. The stud for teminal 9 is also used for one of the small "L" clamps which secure the switch in the headlamp housing. Therefore if you are going to run a wire from terminal 9 to the ignition warning light resitor you will need to make sure the "L" clamp is well insulated from the inside of the headlamp housing otherwise when you switch on the igntion you are likely to get a short to earth.

Roy

Offline BrmBrm

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Re: Douglas Dragonfly make a Switch contact tab
« Reply #3 on: Yesterday at 16:20 »
Thanks Andy 1303 and Red.
Sorry but that's not the info I need.
Stud number 9 should have a brass springy contact of some kind that bears against some  brass rings that wrap around the central shaft of the switch. That's what I am trying to replicate, but don't know what it looks like, or which of the brass rings it contacts.  I don't have one so can't describe it to you. But presumably it's similar but not identical to the ones on the other  terminals.
It's what I need to make, but don't have one to copy. And I don't know how many of the brass rings it should contact.
But thanks any-way.
« Last Edit: Yesterday at 16:31 by BrmBrm »