Shaking/vibrating/jumpy movements on x-axis

About 2 months ago my x-carve started shaking / rattling when moving on the x-axis. It occurs more when moving from right to left. If you have any additional troubleshooting steps, please advise.

machine: 2016 model
controller: x-controller
OS: ubuntu

troubleshooting:

  • replaced the belt
  • readjusted the gear wheel
  • realigned all gantry wheels and squared
  • test with and without running the router, but same issue
  • reseated all wires to the green connector
  • reseated all wires to the gantry terminal
  • unplugged and plugged in both x & y green connectors to the x-controller
  • jogged the machine left and right and no issues
  • ran a line test at slow and fast feed rates and same problem

Link to video 1
Link to video 2