Success Re: ASR-33 more on spacing

From: Chuck McManis <cmcmanis_at_mcmanis.com>
Date: Sun Jun 20 19:58:09 1999

At 12:48 AM 6/21/99 +0100, you wrote:
>This I don't quite understand. The 185775 is at the rear of the machine,
>behind the 183098 link, right?

Yes.

>In the idle position, the link should be far forwards. The plastic tip
>should be pressing on 183056 contact, keeping the leaf switch open. The
>little 'step' on the underside of the link should be caught on the end of
>the 185775 armature extension.

Hmmm, ok, the small step is pretty small and it doesn't "hold". That is to
say if I push the lever forward and engage the step, it holds until a
character is printed and then the vibration causes the arm to move off the
step and we're off to the races again.

>When the solenoid is energised, it attracts the 180844 armature. This
>releases the link. It moves backwards, allowing the contacts to close
>(and thus energise the reader), and trips the clutch.

So the solenoid should pull the armature "down" correct? (thus freeing the
"latched" arm.)

>While the reader is running, the solenoid remains energised. The link
>moves forwards at the end of each character (opening the leaf switch, and
>thus stepping the reader), but the link does not latch. The armature
>extension does not contact the link.

Hmm, it always seems to contact it, just it isn't "holding" it as well.

This BTW was the linkage that was disconnected originally. The 183098 arm
wasn't even in contact with the 185775 armature extension. Now on my
extension there are a couple of "pips" that I assume are guides to keep the
183098 arm aligned with the armature extension. (which is adjustable with a
couple of screws)

>When the reader is stopped, the solenoid is de-energised. The armature
>moves upwards (spring 101386). This time, when the link moves forward,
>the 'step' catches on the end of the 185775 armature extension. The link
>is held in the forwards position. The leaf contacts are held open (reader
>deenergised). The clutch is disengaged.

The edge of the step is pretty smooth, I wonder if it has worn down from use?

The other tidbit is that when the 183098 arm moves backward and then
returns forward it often hits the plastic cover over the leaf spring
labelled "high voltage". Sometimes, it gets stuck in that position (just
leaving the leaf spring closed and the reader energized.

>My guess is that 187557 is too far forwards (towards the front of the
>machine) to allow the link to catch on it.

Very possibly. I'm locating the adjustment section for this linkage now to
see what the books say.

--Chuck
Received on Sun Jun 20 1999 - 19:58:09 BST