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In Reply to: RE: Teres : "Direct Coupling ... a quantum leap in speed stability" .... tech link posted by J.D. on August 1, 2007 at 11:55:12:
Claiming that by adding a lot of constant drag force, adding a little more doesn't make any difference is strange reasoning. What counts is how much that extra drag force is compared to the driving force or torque available to overcome it. They use up a lot of the original torque working against the constant drag force they introduce. If they didn't have that drag force, the affect of the drag force of the stylus would be be vastly less important. If somehow the effect of the brake is to increase the effective inertial mass of the platter, then it could be a benefit, but that's not what they say. This could be achieved in some sense if the breaking scheme somehow resists all changes in speed, both increases and decreases. Am I missing something?
Joe
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Follow Ups
- That's a strange way to go.. - jsm 12:38:08 08/01/07 (30)
- You are missing something - Mark Kelly 16:20:13 08/01/07 (0)
- RE: That's a strange way to go.. - cbrady 14:52:51 08/01/07 (17)
- Wrong! - jsm 15:02:58 08/01/07 (16)
- How so? - cbrady 15:32:04 08/01/07 (15)
- i wonder.... - mikel 16:29:33 08/01/07 (14)
- RE: i wonder.... - John Elison 21:26:03 08/04/07 (12)
- RE: i wonder.... - cbrady 17:02:16 08/05/07 (11)
- RE: i wonder.... - John Elison 22:37:54 08/05/07 (10)
- Digital Jitter - Dave Garretson 16:56:46 08/06/07 (6)
- RE: Digital Jitter - John Elison 19:10:54 08/06/07 (5)
- RE: Digital Jitter - Dave Garretson 20:45:22 08/06/07 (4)
- RE: Digital Jitter - John Elison 05:55:27 08/07/07 (3)
- Your shootout & jitter - Dave Garretson 08:50:24 08/07/07 (2)
- RE: Your shootout & jitter - John Elison 09:50:06 08/07/07 (1)
- RE: Your shootout & jitter - Dave Garretson 11:24:29 08/07/07 (0)
- RE: i wonder.... - cbrady 07:19:48 08/06/07 (1)
- Well, I guess we'll just have to disagree.... - John Elison 08:01:21 08/06/07 (0)
- The point I'm making ................ - bornin50s 02:51:12 08/06/07 (0)
- Entirely different method of speed control - Mark Kelly 16:34:37 08/01/07 (0)
- not at all - J.D. 13:30:42 08/01/07 (4)
- Ummm, well no. - Mark Kelly 16:30:18 08/01/07 (1)
- RE: Ummm, well no. - J.D. 14:30:16 08/02/07 (0)
- Some comments. - jsm 15:11:08 08/01/07 (1)
- RE: comments. - J.D. 15:19:06 08/01/07 (0)
- RE: That's a strange way to go.. - gariepyf 12:46:57 08/01/07 (5)
- Hmmmm.... - bjh 12:50:08 08/02/07 (1)
- LOL1 ( NT )_ - unclestu52 02:29:44 08/05/07 (0)
- RE: That's a strange way to go.. - HW 12:33:46 08/02/07 (2)
- So if one were to claim that adding an SDS motor controller to a VPI table resulted in a Quantum Leap...... - Ivan303 16:17:36 08/02/07 (1)
- The astute manufacturer will blush at such positive reports, not dispute them! he-he nt - bjh 18:12:54 08/02/07 (0)