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Joe Gold
02/02/09 06:12
Read: 661 times

#161936 - Still some outstanding questions
Responding to: Satish S Munot's previous message
AND more questions.

1. Can you describe the engineering application why you need a multiplier?
Answer: Motor synchronization

2. Is the signal sine, square, rectangle or triangle or another shape?
Answer: Encoder digital pulses (square or rectangle)

3. What is the frequency output range of the encoders??? 100KHz to 100KHz + X?
===> Please advise

===> And please advise also advise the revolution speeds of motor1 and motor2

4. What is range of the multiplier factor? is it 1 to 10?
====> Please confirm the ration is fixed 3.27861

5. What is the resolution of the multiplier factor? is the resolution down to 1 millionth?
====> Please confirm the accuracy of the multiplier factor... can you accept for example 3.27?

6. Is this a one-off project or a volume production application?
====> Please advise

7. Please cfm revolution speed of motor2 = 3.27861 x motor2 ? Please confirm

8. Please confirm the ratio between the motors is 3.27861 is fixed?

9. Will both motor1 and motor2 have encoders fitted?

Research ... you may want to look at 80c51 micros with quadrature encoders/decoders and well as comprehensive PCA (Programmable timer capture Array and control). I think Analog Devices have micro's with these sorts of peripherals.

I have limited understanding of you servo motors... but isn't the drive speed a function of the PWM duty cycle or frequency? Hence the the micro/80c51 able to control the revolution speed directly?

If your encoder pulses are 100KHz....then you may need controllers that have PWM's, PCA's and encoders/decoders that can handle much much faster speeds... for accurate resolution and control.


List of 23 messages in thread
Frequency Multiplication      Satish S Munot      01/31/09 02:01      
   what is the wave form shape of the original signal?      Joe Gold      01/31/09 05:34      
   Yes, PLL is the most promising solution      Richard Erlacher      01/31/09 09:08      
   Easy integer approximation      Jerson Fernandes      01/31/09 19:02      
      Yes, but      Joe Gold      01/31/09 20:50      
         Wave Shape      Satish S Munot      02/01/09 20:25      
            Constant speed?      Per Westermark      02/01/09 22:49      
            Constant speed?      Per Westermark      02/01/09 22:50      
            Constant speed?      Per Westermark      02/01/09 22:51      
            Constant speed?      Per Westermark      02/01/09 22:51      
            Still some outstanding questions      Joe Gold      02/02/09 06:12      
            Perhaps you're looking at the wrong motor      Richard Erlacher      02/02/09 07:35      
   Rate Multiplier      Aubrey Kagan      02/02/09 13:17      
      That might work ... but ...      Richard Erlacher      02/02/09 13:26      
         Frequency multiplier      Satish S Munot      02/02/09 21:11      
            How about some numbers?      Richard Erlacher      02/02/09 21:39      
               Frequency Multiplier      Satish S Munot      02/03/09 01:21      
                  I was afraid that was the case ...      Richard Erlacher      02/03/09 08:56      
                     Frequency Multipllication      Satish S Munot      02/03/09 20:46      
                        What about that logic card?      Richard Erlacher      02/03/09 22:19      
                           Frequency Multipiler      Satish S Munot      02/03/09 22:24      
                              Why no further relevant information?      Richard Erlacher      02/03/09 22:28      
                                 I have been following this      Erik Malund      02/04/09 05:55      

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