Pretty sure most MDs mini-systems (HiFi not walkman-style) I've had are direct-drive stepper motors with gears for eject - may be wrong but there's a lot of mechanical force involved during disc eject, more than I would have thought a belt could be relied on to apply, and the noise of soft-touch eject always sounds like a stepper to me.
Believe it or not more systems use a belt than don’t. Nearly every Minidisc system I’ve ever repaired used one. Even a relatively high end £500 Sony MDS JB980, that I sold the other week, had a belt that needed replacing. I actually have an another video on my channel showing me changing out one on a Sony Deck if your interested!
@@Blitterbug A stepper is a precision device and needs a lot of electronics to power it. A DC motor needs none of that, perfect to drive the eject pinion. I mean feel free to point me to a service manual that shows a stepper motor used to drive the eject. For example, the Sony floppy drive with motorized eject used on Macs uses a DC motor. I see no reason for a stepper in this application. And a floppy is bigger than a MD.
Pretty sure most MDs mini-systems (HiFi not walkman-style) I've had are direct-drive stepper motors with gears for eject - may be wrong but there's a lot of mechanical force involved during disc eject, more than I would have thought a belt could be relied on to apply, and the noise of soft-touch eject always sounds like a stepper to me.
Believe it or not more systems use a belt than don’t. Nearly every Minidisc system I’ve ever repaired used one. Even a relatively high end £500 Sony MDS JB980, that I sold the other week, had a belt that needed replacing. I actually have an another video on my channel showing me changing out one on a Sony Deck if your interested!
@@SonicSalvagex Wowsers!
Not sure why you'd need a stepper for that, just a regular brushed DC motor is all you need.
@@8BitNaptime Cheap as chips, accurate and the logic is simple.
@@Blitterbug A stepper is a precision device and needs a lot of electronics to power it. A DC motor needs none of that, perfect to drive the eject pinion. I mean feel free to point me to a service manual that shows a stepper motor used to drive the eject. For example, the Sony floppy drive with motorized eject used on Macs uses a DC motor. I see no reason for a stepper in this application. And a floppy is bigger than a MD.