Finally getting the chance to pull out my atari stuff, and I wanted to focus on my 1050 drive first, as I know my 800xl works just fine.
From a previous thread, I was told that this drive has a homebrew US Doubler mod of some kind in it. Last time I tried using it, I had written notes that maybe the drive mechanism was bad or something.
I don't have my 800xl out to plug in and test, and I don't have floppies of any kind to try and load DOS or something from the drive. If anyone has any suggestions on how to test the drive from cart basic, that would be helpful.
So, here are my checks.
First, a few of pics of the internals for an overview:
You can see in this last pic, the spring for the drive inject/eject is fine, but the little plastic ring it connects to has broken. I temporarily moved the spring to the plastic in front of it and it works ok for testing. I dunno if I want to leave the spring as is with the cover on and in normal use. Springs flying around moving parts and electronics are bad juju.
I'm not sure what this plug is for. I'm guessing it has to do with the stepper motor or something. Looks like it matches up to J15. In fact, there is another cable connector hanging out of the back of the mechanism that look like it was supposed to connect to J15. I tried both (yes I know, unknown shit fries shit). With the original brown connector, everything spins as it should, but it's really loud. With the blue connector on J15, all the same motions happen, but it's MUCH quieter and buttery smooth compared.
Since I don't have the computer itself out of the closet to plug into and test, I made a couple of quick little videos to show what it does when powered on:
Both of these were taken with the red connector on J15 as above.
From the video, you can see the seeker carriage moves. I tried the jumping the first two pins on J10 trick to see if it returns to the back of the carousel, and it does and seems to be seeking just fine.
Is there anything I'm missing here? Is there any way to test this thing without functional software of any kind?
The disk I used to test the motor and such is a DOS formatted HD disk. Not usable in this drive, but it was a physical boilerplate just to test the mechanics.