FD400 drive troubleshooting

The "he" is me... I've swapped drives originally and this drive worked for a short time. I was originally looking for common failure modes for these drives. I've cleaned the heads using a disk but a more thorough and direct cleaning is warranted. The problem is that this is the second drive in the pair and to get to it means I have to disassemble half of the unit. I just haven't had the time in the last few days. I also want to check the drive RPM. I found a program for the Model 100 and bar code reader which turns it into a stroboscope, but I wanted to validate it on a working drive, so I have to pull out a TM100 drive. But, alas, I haven't had time for that in the last few days, either. I'm going to try to do that today. Rich On 11/27/07 12:08 AM, "dwight elvey" <dkelvey at hotmail.com> wrote: Rich -- Rich Cini Collector of Classic Computers Build Master and lead engineer, Altair32 Emulator http://www.altair32.com http://highgate.comm.sfu.ca/~rcini/classiccmp