On 12/17/2017 12:04 PM, Aaron Jackson via cctalk wrote: > Now that I have my RX02 drive working I have started to take a look at > the RL02 drives again. I hooked a scope up to the sector transducer and > sector timing test points, and they look nicely aligned. So I moved on. > > Then I hooked up the scope to the TP1, TP2 and the sector timing TP and > compared it to the output in the RL02 tech manual. S1 was fine but S2 > was offset in the wrong direction (probably need to see page 3-8 in the > manual to understand). I had a look at where the heads are connected to > at up was connected to down and down was connected to up. > > Without understanding the consequences I switched these and loaded a > pack. Unfortunately I heard a horrible sound and I now have a thin black > ring on the bottom side of my platter, which I am very upset about. :( I > unloaded very quickly but I think the damage is done. One turn thats all it takes.
> Why would the heads be installed this way? Error, accident. > and why did it destroy my > platter when they are connected "correctly"? Maybe the control finally got a signal and decided to load them. > Does anyone understand what might have happened? Simple the heads are designed to fly and have a shape suited for that. Flip them over and they are wrong shape, they don't fly, they dig in.... oops! Make sure the correct heads are in there correctly. Allison
