400k Floppy Drive Head Shaking

[jasonfortheworld]

I've got a Sony OA-D34V-22 400k floppy drive that suffers from 2 big issues right now. One is that the drive refuses to eject anything. The motor is dead silent when I try, but thats secondary to my main issue with the read head of the drive.

For some reason the head can't get past the roughly half way mark when reading across a whole disk. I've got an example video of the issue where the heard starts to rock back and fourth about half way into initializing a disk where it stops and return to the starting point.

I have a second video that shows the head is completely stuck and rattles in place if I manually set the head all the way forward and boot up the machine. It's supose to pull the head back to the starting point but it can't seem to do that.

I have relubed the drive which I'm surprised didn't fix the issue. Anyone ever deal with this before or know of a fix?

 

[bibilit]

Sounds like the worm screw is not driving properly the head.
The shaft on the side of the head can be stuck too.

 

[jasonfortheworld]

Sounds like the worm screw is not driving properly the head.
The shaft on the side of the head can be stuck too.

The head seems to glide just fine along the shaft if I slide the head manually. The worm screw may be the issue, but a visual inspection doesn't show anything. The screw was also cleaned and relubed too.

I did notice that since the head bounces up and down on the worm screw while it spins maybe there isn't enough downward force on the head to press it against the screw. I tried lightly applying pressure and sure enough the head catches a bit better, but the moment I stop it falls off the gears again.

Is there supose to be vertical play on the head at all? Right now it seems like the head has just enough play to slip over the gears.