Difference between revisions of "Salvage Challenge - Make Me Spin"
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== Answers == | == Answers == | ||
| − | + | [[User:WestfW|WestfW]] 18:41, 7 February 2009 (PST)<br> | |
| + | Hmmph. Way to post photos with no chip numbers readable...<br> | ||
| + | I've investigated similar "modules" from CD and floppy drives in the past. All the logic is typically contained in that single big chip, but finding data for those chips can be very difficult. There seems to be a lot of churn in the marketplace as vendors try to reduce costs, and even if the chip is from an identifiable company, and that happens to be a company nice enough to have downloadable datasheets, by the time the product hits the scrap heap the particular chip it uses is likely to be obsolete and no longer listed.<br> | ||
| + | Here is a representative chip from Sanyo: http://www.datasheetcatalog.org/datasheet/sanyo/ds_pdf_e/LB1987.pdf<br> | ||
| + | I also don't have any faith in the board-level signals being consistent from one vendor (or even one model) to another. Sigh. Reverse engineering a particular motor board is likely to be largely useless, since the next VCR motor board may have a different pinout, different chips, and different behavior. One of the fine points of "salvage" is to pick a product that was released with a consistent design, in volume, so that if you figure it all out, you can get more, and so other people can use your data for ''their'' scrounging... | ||
== And the Judges Say == | == And the Judges Say == | ||
Revision as of 18:41, 7 February 2009
The Challange
These are multiphase motors from video cassette recorders. Think they may be called Spindle Motors. Lots moving to dumps now. There are some uses for these, see: Motors: Brushless at: Salvage Parts and Sources. The challange here is to power them up as motors using the drive electronics they alreay have. Typically they have 3 to 6 connections. It seems like applying the right signals to these would be all that it would take. But what are the signals?
Answers
WestfW 18:41, 7 February 2009 (PST)
Hmmph. Way to post photos with no chip numbers readable...
I've investigated similar "modules" from CD and floppy drives in the past. All the logic is typically contained in that single big chip, but finding data for those chips can be very difficult. There seems to be a lot of churn in the marketplace as vendors try to reduce costs, and even if the chip is from an identifiable company, and that happens to be a company nice enough to have downloadable datasheets, by the time the product hits the scrap heap the particular chip it uses is likely to be obsolete and no longer listed.
Here is a representative chip from Sanyo: http://www.datasheetcatalog.org/datasheet/sanyo/ds_pdf_e/LB1987.pdf
I also don't have any faith in the board-level signals being consistent from one vendor (or even one model) to another. Sigh. Reverse engineering a particular motor board is likely to be largely useless, since the next VCR motor board may have a different pinout, different chips, and different behavior. One of the fine points of "salvage" is to pick a product that was released with a consistent design, in volume, so that if you figure it all out, you can get more, and so other people can use your data for their scrounging...
And the Judges Say
Lets wait for some answers
The Prize
What should the winner get, who will provide it.
