Hello Folks,
I was having a problem with my machine measuring incorrectly. I read a few posts and found some of you are having a problem with this also. If you are sure it's not the encoder roller wheel, tracking on a bad board edge, your encoder is probably dirty. Have no fear, it's fairly easy to fix.
Please read this step by step and if you don't feel comfortable doing it call LHR Tech. support for assistance. This may violate your warranty. I am not responsible for any damage to your machine or any thing else that may happen during this process.
Y Axis Encoder R&R:
1. Remove the two small screws at each end of the Squaring Plate. See Fig.
2. Lift Squaring Plate up and gently unplug connector plug from back of encoder.
3. Clean any saw dust you might find on Squaring Plate and Encoder Assembly.
NOTE:
Find a clean place to do the next step. Encoders discs are delicate and don't like dust, hair or scratches. Also, using any liguid or solvent may remove or damage the radial bars on the disc, requiring replacement of th encoder.
4. Remove the two screws on the encoder back cover, clean and set aside.
5. Gently blow out any dust or debris on the encoder disc. Don't touch it as you may scratch it.
6. When you have cleaned it thoroughly, put a thin bead of RTV silicone sealant around the mating edge of the cover.
7 Replace cover and screws. Don't over tighten the screws or you may crack the cover.
8. Reconnect the encoder plug and use some electrical tape to seal the gaps around the plug and wires.
9. Reinstall the assembly into the machine.
10. Put a board in and have the machine measure the length several times to be sure it's working as it should.
11. Be sure to make an end cut and check for square before running a project.
Good luck and happy carving.
Rick