Checks / troubleshooting:
1. Check error history from "Test7: Record" of self-
diagnosis function.
2. Move carriage in both directions while the printer is
turned off, and check if there is any position where
carriage does not move smoothly.
3. Set the number of endurance running cycles to 50 or
more from "Life 1: CR motor" of self-diagnosis function,
and check if "Y encoder error" occurs.
4. Check if T fence is contaminated or worn out.
5. Check "Encoder: CR" from "Check: Test” -"Test5:
Encoder" of self-diagnosis function.