Problem with floppy drives

[Tesla]

Hi all.
I have a problem with my floppies drives.
They are connected by a twistled cable (thank Derek) to a Tetroid SGC. Time ago the flp2_ began to work badly and finally, inserting the disk it makes immediately a rustling noise. So I replaced the drive with an other.
Now the new drive works perfectly but the old drive makes a rustling noise soon as I insert a floppy, and obviously doesn't work.
Can someone help me?
Thank you all.
Greetings, Marco

[Cristian]

Still unsolved?

[Derek_Stewart]

Hi,

Maybe try cleaning the insides of the floppy drives, maybe there is dust on the mechanism.

Either take the top cover from the drive and use a Cotton Bub with Isopropyl alcohol (IPA) on read/write heads and gearing that moves the drive head.

[Tesla]

Hi Cristian and Derek.
Thank for your interest.
In the end I discovered that the problem was the SGC to which the floppies were connected .

Best regards.
Marco

[Dave]

If it's just the floppy section that is problematic, the first place to check is the cable. The SGC may use a different cable to a normal Shugart interface on other QL floppy drives.

If you suspect it's the IC, replacement DP8473V are available.