Technical question for builders

[Anglepoise]

I am about to make up my first LE.
I have read everything I can find on this subject.

I have a question. I understand about grinding a groove in the ES-Can for the ground connection, but how is the ES-Can grounded to the E-Screw?. The potting ( non electrical conductive ) glues these two items together. So if the ground current comes up the body, enters the Aleph II head and then flows through the threads of the E-Screw, how does it get to the ES-can??

 

[wasabe64]

The lip of the EScan makes negative contact with the top edge of the Aleph or e-series body, the head itself is not part of the electrical path. An electrical path between the EScan and eScrew is not necessary.

 

[Anglepoise]

Well that makes sense.
So then the assembly would be as follows.
Screw together the body and head, snug up to the shoulder.
Screw down the E-Screw assembly, till it bottoms out on the 'top edge of the body'.
Insert reflector, 'o' ring and then lens and retaining ring.

 

[wasBlinded]

I think the procedure is to screw the LE into the head until the bottom of the LE is flush with the bottom of the head. Then put the reflector and O-ring in, and snug down the retaining ring. This will properly position the reflector to limit travel of the LE into the head on subsequent removal/reinstallations, allow proper contact of the body with the EScan, and proper position of the LED within the reflector.

 

[Chop]

The proper assembly procedure varies with the model of Aleph. The procedure also varies a bit by preference.

I've found that the Aleph I is pretty straight forward. Drop in the reflector, then the o-ring, followed by the lens and topped off with the bezel ring. The LE should screw in to the proper depth.

With the Aleph II, I typically epoxy the reflector into the head to make sure that the position of the reflector doesn't shift with use. After the epoxy sets, I then just add the o-ring, lens, and retaining ring.

With the Aleph III, I put the LE into the head and put the head on the body. When I get a proper gap between the head and the body, I then install the reflector and top it off with everything else.

Of all of the heads, the Aleph I is the most fool proof.

 

[Billson]

[ QUOTE ]
Chop said:
The proper assembly procedure varies with the model of Aleph. The procedure also varies a bit by preference.

I've found that the Aleph I is pretty straight forward. Drop in the reflector, then the o-ring, followed by the lens and topped off with the bezel ring. The LE should screw in to the proper depth.

With the Aleph II, I typically epoxy the reflector into the head to make sure that the position of the reflector doesn't shift with use. After the epoxy sets, I then just add the o-ring, lens, and retaining ring.

With the Aleph III, I put the LE into the head and put the head on the body. When I get a proper gap between the head and the body, I then install the reflector and top it off with everything else.

Of all of the heads, the Aleph I is the most fool proof.

[/ QUOTE ]

I thought I was the only one with the loose reflector in the Aleph 3 head. It never occured to me that this is actually common for all of them. Is it also the same case with the Aleph 2?

 

[Darell]

My procedure is identical with Chop's... that's what you get when you share notes. /ubbthreads/images/graemlins/smile.gif

The A-3 reflector should not be loose if you do as Chop posted. Just snug the ring down onto the stick of goodies. If it has been jarred hard, the reflector may pop past the o-ring. Just pull it apart and start over. Should be as good as new.

As for passing the current through the head - even if it DID use that technique - the current wouldn't pass through the anodize of the sink or head threads. Nope, the head is not needed. Pop just the LE onto a battery tube and hold it down. It'll light, because that's the design of the thing.

Good luck. It is fun to build your first!