Solved! Dolphin XP007 can't Remove Back and Forth

Dolphin XP007 couldn't move back and forth and it could only rotate.
cant move
cant move
How to Solve:
1.Turn XP007 around, and check if something is stuck at the bottom and remove it.
turn around
2.Adjust the 2 screws and move the machine back and forth.
When it moves smoothly, fix the 8 screws marked
fix screws
fix screws
3.Slightly loosen the 2 screws
loosen screw
Then XP007 Machine should move and work fine.