CD-ROM Steppers for X-Y beds February 06, 2010 08:17AM |
Registered: 14 years ago Posts: 94 |
Re: CD-ROM Steppers for X-Y beds February 06, 2010 08:40AM |
Registered: 15 years ago Posts: 289 |
Re: CD-ROM Steppers for X-Y beds February 06, 2010 06:08PM |
Registered: 14 years ago Posts: 41 |
Quote
Now. DVD ROM motors. The average DVD drive yields three motors. There is usually a DC motor for moving the tray. There is a DC or stepper motor for moving the optical head. And there is usually a three-phase spindle motor for spinning the disk. It's the last one that people are usually interested in, since they tend to be pretty powerful, and ... unusual. There is a lot of information on using such spindle motors, either as-is or "modified" in the RC plane community, but they tend to rely on commercial speed controllers (or dedicate entire arduino-class electronics to just running the motor.) This isn't out of the question; you can get such speed controllers for less than $15, and you control them pretty much like RC servos.) In THEORY, you can also drive them like stepper motors with one-too-many or one-too-few coils, and I've always thought that there ought to be a pretty simple circuit that would let a microcontroller drive them in a rather slow and jerky fashion, but I don't think I've even seen one (Another problems is that such motors tend to be pretty power-hungry, even if you're just trying to make them hold a position...)
Re: CD-ROM Steppers for X-Y beds February 06, 2010 08:18PM |
Registered: 16 years ago Posts: 1,094 |
Re: CD-ROM Steppers for X-Y beds February 07, 2010 09:02PM |
Re: CD-ROM Steppers for X-Y beds February 08, 2010 01:24AM |
Registered: 14 years ago Posts: 94 |
Re: CD-ROM Steppers for X-Y beds February 08, 2010 01:43AM |
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Re: CD-ROM Steppers for X-Y beds February 08, 2010 03:33AM |
Registered: 16 years ago Posts: 1,094 |
Re: CD-ROM Steppers for X-Y beds February 09, 2010 01:57AM |
Registered: 14 years ago Posts: 28 |
Re: CD-ROM Steppers for X-Y beds February 11, 2010 07:33AM |
Registered: 15 years ago Posts: 478 |
Ianmcmill
Re: CD-ROM Steppers for X-Y beds November 07, 2012 07:37AM |