1541 Alignment disk

Azimuth was often not adjustable either. The drive service manual tells you to check it, and if it's incorrect, to replace the head assembly. Given that replacement heads re now totally unobtainable, the only reason for needign to chec kit is to porve that's why the drive isn't working proprely. It's also not likely to change after manufacuter, unless the head carriage is damaged in some way. I think some of the drives wit hthe positioner aas a separate unit did allowyou to move the positioner slightly and change the azimuth (and as a by-product, also slightly change the track pitch). Perhaps I've been lucky, but simply settign the posiitoner so that the head movement is as near radial as I can get it has always worked for me. Incidentally, if you want a shoick, try buying a new 3.5" no-name drive (they do still exist) and put an alignment disk in it (the read amplifier testpoitns are not hard to spot, even on drives with everything in one ASIC). I've had new drives which are not correctly aligned. -tony