You will experience some slight resistance presented by the stepper motor. By hand (and with power off), you should be able to freely move the head carriage along its rails. Deteriorated lubrication there results in the inability of the head carriage to move properly, or in extreme cases, not move at all.
This is commonly seen on the rails that the head carriage slides up and down on. It is often found that in 5.25" floppy drives that have not been used in many many years, that the lubrication in the drive has deteriorated to the point where it 'gums up' and stops the drive from functioning properly. In the first sentence of that section, ' standard PC floppy controller' should have instead been ' standard AT floppy controller' to avoid confusion.ĭeteriorated lubrication in floppy disk drive More information about this subject is in the 'Diskette Changeline' section on pages 781 and 782 (PDF pages 814 and 815) of the document here. Some connector adapters, such as those shown at here and here and here, have a jumper that controls whether or not pin 34 is connected. Some 360K drives have a jumper that can be removed to achieve that (e.g. If you intend to connect a 360K drive, the simple rule is, disconnect pin 34. A READY signal is a problem for the 5162. However, some 360K drives generate a READY signal on pin 34. Failure to observe the requirement can result in corrupted floppy disks.ģ60K floppy drives in an IBM 5162 are not required to generate a DISK CHANGED signal on pin 34, possibly because the BIOS authors knew that most 360K drives cannot generate such a signal. This is the same as what occurs in the IBM 5170.ġ.2M floppy drives in an IBM 5162 are required to generate a DISK CHANGED signal on pin 34, a requirement of the IBM 5162's BIOS. The controller supplied in the IBM 5162 monitors pin 34. However, in the IBM 5162, the pin 34 situation is much different. In the earlier IBM 5150, 51, the supplied IBM floppy controller ( photo) does not 'care' about pin 34 - because the controller does not monitor pin 34 of the cable connector. Some early 16-bit cards are too tall for the 5162's case.
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