This document primarily discusses how to manually adjust the encoder's position.
When should you adjust the encoder's position? If the motor correction process fails to improve the VFA , adjusting the position of the encoder can resolve this issue.
¶ 1. Preparation
¶ Introduction to the Y-axis Motor Structure
The Y-axis motor mainly includes four parts:
- Magnet rail section
- Y-axis mover
- Magnetic grating ruler
- Magnetic encoder
Their respective positions are as follows:
The magnetic grating ruler is used to measure the motor's position. With specialized tools, we can see a distribution of equidistant magnets on the grating ruler:
¶ 2. Main Steps:
Step 1. Loosen the two fixing screws of the Y-axis encoder.
Please note that you only need to loosen the screws; do not remove them.
Step 2. Press the encoder inward with one finger, while sliding the Y-axis back and forth with the other hand.
If you feel friction between the encoder and the grating ruler while sliding the Y-axis, reduce the pressure on the encoder slightly.
For specific details on steps 1 and 2, please refer to this video:
https://www.youtube.com/watch?v=8O__bI-4Wdw
Step 3. Find the appropriate pressure and position, then tighten the fixing screws. Be careful not to tighten them completely; just ensure that the encoder does not slide.
Step 4. Slide the Y-axis again; if there is a position where the friction is noticeable, stop there and slightly move the encoder outward. After adjusting the encoder, move the Y-axis back and forth in this position to check for any friction. If there is no friction, fix the two screws tightly.
For the procedures of steps 3 and 4, please refer to the demonstration in this video:
https://www.youtube.com/watch?v=GhuoR2zC1S4
Step 5. After completing the above encoder adjustments, please recalibrate the Y-axis encoder by referring to this link:
https://wiki.peopoly.net/en/magneto/magneto-x/linear-motor-calibration-guide