| ??? 02/02/09 14:35 Read: times |
#161943 - Perhaps you're looking at the wrong motor Responding to: ???'s previous message |
What determines the speed of the system? What is its exact speed? Which motor is the governing factor? How stabile (how much short-term and long-term variation is there, e.g. in femtoradians/second per terafortnight) is its speed over time? How precise must the relationship be (30%, 3%,, 20 ppm 3 ppb, 1/10^50)? How much loop delay can the system tolerate, i.e. must the second motor track within a microsecond or two, or can it wait, say two minutes before settling? ... how about half an hour?
It's often easier to divide a frequency rather than to multiply. Moreover, if the two motors must remain in precise synchronization, perhaps it's easier to control them from a common frequency reference. RE |
| Topic | Author | Date |
| Frequency Multiplication | 01/01/70 00:00 | |
| what is the wave form shape of the original signal? | 01/01/70 00:00 | |
| Yes, PLL is the most promising solution | 01/01/70 00:00 | |
| Easy integer approximation | 01/01/70 00:00 | |
| Yes, but | 01/01/70 00:00 | |
| Wave Shape | 01/01/70 00:00 | |
| Constant speed? | 01/01/70 00:00 | |
| Constant speed? | 01/01/70 00:00 | |
| Constant speed? | 01/01/70 00:00 | |
| Constant speed? | 01/01/70 00:00 | |
| Still some outstanding questions | 01/01/70 00:00 | |
| Perhaps you're looking at the wrong motor | 01/01/70 00:00 | |
| Rate Multiplier | 01/01/70 00:00 | |
| That might work ... but ... | 01/01/70 00:00 | |
| Frequency multiplier | 01/01/70 00:00 | |
| How about some numbers? | 01/01/70 00:00 | |
| Frequency Multiplier | 01/01/70 00:00 | |
| I was afraid that was the case ... | 01/01/70 00:00 | |
| Frequency Multipllication | 01/01/70 00:00 | |
| What about that logic card? | 01/01/70 00:00 | |
| Frequency Multipiler | 01/01/70 00:00 | |
| Why no further relevant information? | 01/01/70 00:00 | |
I have been following this | 01/01/70 00:00 |