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From: ForthNet@willett.UUCP (ForthNet articles from GEnie)
Newsgroups: comp.lang.forth
Subject: Forth Engines / Harris
Message-ID: <1318.UUL1.3#5129@willett.UUCP>
Date: 12 Jul 90 02:56:27 GMT
Organization: String, Scotch tape, and Paperclips.  (in Pgh, PA)
Lines: 26


 Date: 07-09-90 (15:12)              Number: 652 (Echo)
   To: JAN HOFLAND                   Refer#: NONE
 From: JOHN SOMERVILLE                 Read: NO
 Subj: HZ TIL IT HURTS               Status: PUBLIC MESSAGE

 I don't think you misrepresented anything. The systems I worked on about
 ten years ago were capable of 1-3 KHz providing one didn't mess with the
 amplitude. If you did mess with the frequency and the amplitude you got 
 into a awful non-linear mess due to the feedback system (LVDTs, Load 
 Cells), throw in the hydraulic system and it was time to go home. With 
 your system you can enlarge the table from 2 to 3 dimensions and have
 linearity over the whole system, the 3rd dimension would handle the
 different displacements. Providing nothing went through the roof ( wall 
 or floor ), the system should make it to the limitation of the RTX 
 board.

 Or am I full of it?

 Thanks for the info. No doubt I will be asking you more questions as I 
 get into the project.

 NET/Mail : British Columbia Forth Board - Burnaby BC - (604)434-5886   
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