HP97 The journey begins

[teenix]

Hi all,

I was having one of the sleepless nights where you lie there thinking of the most unlikely things.

I am no mechanical wizard and I was wondering how the eccentric cam works on the card reader drive roller shaft to set the 180mA motor current.

The shaft is inserted into two fixed holes on the card reader frame assembly. If the shaft is offset with respect to the larger end piece with the screw slot, wouldn't turning it do nothing for shaft eccentricity? I would have thought in this situation the larger end piece would experience the offset while turning.

I cannot see any offsets on the shaft itself, but if it did it would suggest that the shaft is oval shaped but that doesn't make sense for the drive roller.

It is definitely not bent to give an offset, so my mechanical aptitude has failed me :-)

cheers

Tony