| ??? 02/27/07 12:48 Modified: 02/27/07 12:50 Read: times |
#133791 - Step to Encoder Ratio Responding to: ???'s previous message |
In an ideal situation the stepper motor to encoder pulse ratio will have some ratio but there is no reason specific to expect that the ratio would be 1::1.
Your stepper motor may be say 1024 steps per revolution and the encoder may be 1000 lines per revolution. So there would be some type of ratio that you have to work out. You mentioned also that you coupled via a timing belt. There may also be an additional ratio component introduced in the belt coupling if the belt pullys are not exactly the same number of teeth around the circumference of each pully. --------------- On an XY table I have found it to be far more accurate to measure the table position directly with linear slide type encoders instead of using the encoder on the motors. - 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 |