On 8/16/2015 11:19 AM, Chuck Guzis wrote: > On 08/16/2015 08:24 AM, dwight wrote: >> I left a note there about using CRCs to do data correction. It is a >> simpler method for software than normally use. > > I posted a link on VCF about using GNU CRC RevEng--a great little > utility to aid in determining polynomials and initial conditions for > CRCs. Not too different from figuring oddball floppy encodings. > > What I'd like to see is a QIC mechanical solution that treats DC carts > as a reel-to-teel drive--no tension band worries. I imagine this could > be done by motorizing the takeup and supply reels and putting in a > driven capstan with suitable RPM control. Head positioning, of course, > could be handled the normal way. Perhaps an old top-of-the-line audio > cassette transport could be adapted. > > --Chuck >
More likely, apply the technology used on some 9 Track drives: a little tension arm and then use servos to drive the supply and takeup reels, and an encoder (*not* driven) that measures speed (in place of the capstan on older drives).
