Re: Twiggy Drives

Yes, the Twiggy spindle motor is variable speed. There are 8 different nominal speeds (a few tracks run at each speed like the 3.5" drives), with a provision for fine-adjustment of the speed in software (presumably for copy protection or data recovery).

I took those Twiggy pictures and made various precise measurements for someone else who was making a 3D CAD engineering model, I think with the hope of making a modern equivalent some day. I believe he got quite far along with the data entry, but has not had much time to work on it since.

I suspect that the complex parts could be made of plastic with current 3D printing technology, perhaps with some metal reinforcements here and there for stiffness or temperature stability.

I think the motors and electronics can be arranged without much fuss, but the heads and head alignment might be a big challenge. Perhaps a modification of the carriage could be designed that provided for adjustment/replacement of the heads after assembly.

>James those are some fantastic pictures. Maybe when 3D printing
>technology progresses the point where metal printing at a small
>scale is cost effective....someone will print up a new twiggy drive.

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