| ??? 09/20/05 12:19 Read: times |
#101255 - That is not the big risk Responding to: ???'s previous message |
You could use a time duration with a little experementing but this will need a really tolerant motor else you may burn the winding if you continue driving it beyond end position of the valve.
That is not the big risk, it is fairly easy to shut down before the motor burns. The big risk is that if anything makes the motor work harder, you will see the same current increase and the motor will not be at the endpoint of the valve. When I was doing stuff in the chemical industry a customer related to me that he had a case of losing 100s of gallons of a costly chemical because the motot stopped before the valve was closed. The cause was that it was cold enough to increase the viscosity of the chemical. Just a "little" thing, but as so often "who would have thought of that" Erik |
| Topic | Author | Date |
| Sensing Stop Point of a DC Motor! | 01/01/70 00:00 | |
| I doubt that, the time it takes a motor | 01/01/70 00:00 | |
| More! | 01/01/70 00:00 | |
| You can sense the stops by measuring the | 01/01/70 00:00 | |
| I to V? But | 01/01/70 00:00 | |
| SHUNT | 01/01/70 00:00 | |
| You missed the important point! | 01/01/70 00:00 | |
| Listen to Erik & Andy | 01/01/70 00:00 | |
| Another Approach! | 01/01/70 00:00 | |
| Not reliable | 01/01/70 00:00 | |
| you don't get it, do you | 01/01/70 00:00 | |
| Stop sensing for DC motor | 01/01/70 00:00 | |
| Please Say Sensing stop ....Please | 01/01/70 00:00 | |
| Sensing Stop -:) | 01/01/70 00:00 | |
| no........ | 01/01/70 00:00 | |
| That is not the big risk | 01/01/70 00:00 | |
| I've seen it all before! | 01/01/70 00:00 | |
| Thanks Russel And Erik | 01/01/70 00:00 | |
| CYA | 01/01/70 00:00 | |
| Why did the original driver fail? | 01/01/70 00:00 | |
It Works proper but.. | 01/01/70 00:00 |