| ??? 12/06/04 11:18 Read: times |
#82590 - low-speed Responding to: ???'s previous message |
My first suggestion is to use a motor( with or without a gearbox) with excess power so the variable load has minimal impact. This is not necesarily the most economical solution! But he only wants very low speed; 60-100 rpm! Very few electric motors (especially small DC motors) are designed to give continuous high torque at such low speed. For many small DC motors, I think 60-100 rpm would probably count as "stalled!" I think Steve is right - a gearbox is needed. Farnell (among others) do gearbox kits if you don't have any Meccano... Another though is to use a cheapy chinese made power drill - it may even have a speed control. But, again, I doubt this would go down to 60 rpm. A cheap electric screwdriver might be better - and they're very cheap these days! |
| Topic | Author | Date |
| rpm dc motor with variable load | 01/01/70 00:00 | |
| Most Accurate Control | 01/01/70 00:00 | |
| PID | 01/01/70 00:00 | |
| 20% speed tolerance | 01/01/70 00:00 | |
| tapping brushed motor is applicable | 01/01/70 00:00 | |
| brushed motor | 01/01/70 00:00 | |
| Wrong Approach | 01/01/70 00:00 | |
| Some suggestions | 01/01/70 00:00 | |
| low-speed | 01/01/70 00:00 | |
| Control | 01/01/70 00:00 | |
| Change the motor ! | 01/01/70 00:00 | |
| Continuously and discontinuously | 01/01/70 00:00 | |
| back-emf | 01/01/70 00:00 | |
| Or. | 01/01/70 00:00 | |
| give me some time | 01/01/70 00:00 | |
problem solved | 01/01/70 00:00 |