| ??? 02/27/07 13:15 Read: times |
#133794 - Problem With Steppers Responding to: ???'s previous message |
One problem with stepper motors is that in a system they do not always take the step pulses given. And sometimes they may go extra steps.
Another problem is that if the PPR of both the stepper and encoder are meant to be the same there will certainly be strange phasing issues between the steps given and the encoder lines read. If you must keep the stepper I would suggest an encoder capable of at least 10X the resolution to be able to measure over this phasing problem. The linear slide on the table is a better way to go because it also permits the removal of backlash in the table X Y drive system as you change back and forth between directions. In applications I have implemented I almost always gave up on stepper motors and used servos in their place because of speed, smoother operation and finer control. The promise of lower cost with steppers is many times a myth from my experience. - Michael Karas |
| Topic | Author | Date |
| Rotary Encoder | 01/01/70 00:00 | |
| Step to Encoder Ratio | 01/01/70 00:00 | |
| Rotary Encoder | 01/01/70 00:00 | |
| Problem With Steppers | 01/01/70 00:00 | |
| this could be your problem | 01/01/70 00:00 | |
| Rotary encoder (3) | 01/01/70 00:00 | |
| I'd be really curious ... | 01/01/70 00:00 | |
| Reading Encoders | 01/01/70 00:00 | |
| That's IT | 01/01/70 00:00 | |
| What's it??? | 01/01/70 00:00 | |
| well it could very well be | 01/01/70 00:00 | |
| This sounds right... | 01/01/70 00:00 | |
| In that case maybe he is actually reading 'a' | 01/01/70 00:00 | |
| Still laughing over that post... | 01/01/70 00:00 | |
Positioning using an encoder as feedback | 01/01/70 00:00 |