[GreenKeys] Model 15 troubleshooting

[John Nagle]

    OK, I have my model 15 oiled, powered, and connected with
keyboard and printer in series.  It runs, but won't type correctly.
Not even close.

    First, this is a "clean" model 15; there's no sign of damage
or nonstandard modifications.  It was just in storage for a long
time, and the lubricants had gunked up.  I've cleaned it by
immersion in Simple Green, and oiled it per the manual, using
5W-20 Valvoline synthetic, with lithium grease on the gears and
big sliding parts.  Small oiling points were oiled with a one-drop
precision oiler.  Everything runs, and reasonably quietly.

    Loop power is 120VDC regulated, through a resistor just under 2K.
The selector magnet has a 55 ohm resistance, and loop current was
measured at 60.4 mA.  The selector magnet ("pulling" type)
seems to be pulling in correctly.

    But the selector magnet seems to be "slow", like it can't keep
up with the incoming bit stream.  RYRYRY doesn't bring up alternating
code bars.  It's as if the selector magnet can only keep up with
about half the bit rate.  (The machine seems to be running at standard
speed; it's not like somebody put in 100WPM gears or something.)

    The selector magnet faces are clean of oil, the selector magnet
moves freely, and all the obvious stuff seems OK.  The swords
and everything downstream from there seems fine.   I've de-gunked
and carefully oiled everything in that area, and it doesn't help.
Adjusting the range finder has little effect.

    Am I missing anything obvious?

				John Nagle