RE: [alfa] GTV-6 wipers: swept area

["Brian Shorey" <bshorey@xxxxxxxxx>]

> I got some wiper arms for my GTV-6 that aren't quite as worn as the
> original ones, so that the blades are more perpendicular to the glass
> now--wiping is much improved.  However, the swept area is now somewhat
> less!  The driver's side, at least, doesn't sweep out as far as it used
to.
> The obvious answer is that I installed them one spline off, but when they
> park they go to the exact same position that the old ones went to.  What's

> going on here?  Does the control circuitry have some sort of mechanism by
> which it can tell when they've hit the bottom of the windshield (increased

> current draw) and stop them in the same place every time?  If that were
the
> case, wouldn't they sweep out just as far every time, too?

It's a mechanical linkage, the motor rotates, it doesn't move in two
directions.

So bottom is bottom, and top is top.  If you put the arms on too 'low', then
the motor will attempt to drag them across the cowl.  If you put them on too
'high', then it will merrily wave them off the edge of the windshield.

If they're parking at the same spot on the bottom, but not at the top, it
doesn't make any sense.  My guess is that maybe the new arms have some slop
in the splines, so they're not being pushed all the way to the 'up'
position?

???

bs
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