Hard Drive RPM Control?

[yapatel]

Trying to create a feedback system to read the hard drive RPM and then set the RPM to a specified value.

Any ideas on how to set the rpm of the drive?

 

[IRstuff]

for school?

TTFN
faq731-376

 

[yapatel]

Nope, trying to create a feedback system demo.

 

[IRstuff]

????

Wouldn't you compare the measured vs. desired and command the servo to increase or decrease the rate as appropriate?

TTFN
faq731-376

 

[MacGyverS2000]

Feedback system demo for what? A hard drive system is not something anyone needs to work with at that level unless they're working on, well, hard drives...

Dan - Owner

http://www.Hi-TecDesigns.com

 

[yapatel]

IRStuff - you're right but my question is how does one control the servo? I'm having a difficult time figuring that out.

 

[IRstuff]

Are you talking about trying to control the servo on an off-the-shelf HD? If so, then you're basically SOL, unless you know someone from the manufacturer. Even then, it's probably unlikely that the is a servo command, since there's generally no reason to change the speed.

TTFN
faq731-376

 

[krugtech]

there are programs available to modify the hard drive speed from some of the drive manufacturers under windows and there is SMART that gives info back.

Chris Krug

http://krugtech.com/

Maximum Up-time, Minimum BS