| ??? 12/06/04 10:54 Read: times |
#82588 - Some suggestions 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!
Whilst it is instructive to use a microprocessor for your task, it is probably overkill. As mentioned by another respondant, using the back emf of the motor or tacho feedback is probably the most economical solution. The old Tandon tm500 5 1/4inch diskette drives had a nice little circuit for their speed regulation using a lm2917 tacho ic. An 'off the shelf' solution is to steal mum's mixmaster(we're talking about a cake mixer not a scratch desk for hip-hop) - they had plenty of torque. Another though is to use a cheapy chinese made power drill - it may even have a speed control. No mention of 8051 yet! |
| 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 |