[GreenKeys] Model 15 printing impact adjustment

[John Nagle]

     I've had problems for some time with my Model 15 wearing out
ribbons too fast.  The keys were hitting the paper too hard.

     There's an adjustment for this, as it turns out.  See
"Printing Bail Spring Tension Adjustment" in the Adjustments
manual.  If you crank the screw out, reducing the spring tension,
the keys don't hit as hard.  Mine seemed to have been set to
a level suitable for pounding through multi-part carbon paper.
After turning it down, I'm still getting good print quality,
the ribbon isn't being chewed up, and the letters can't
be felt on the back side of the paper. (Except for "-", which
is still punching through.  Even "." doesn't do that.)
The adjusting screw has a lock nut and lock washer, like most
of the other adjustments.

     Ribbons, as I mention occasionally, are easy to get;
they're Nukote B76 Underwood typewriter ribbons, available
from Amazon.com.  They're nylon; the original ribbons
were cotton, and heavier duty.

				John Nagle