What causes parts to be knocked off or shift on the bed plate?

Normally this is caused by a combination of the following issues:

Infill patterns that cross already drawn infill lines (e.g. grid) are inconsistent with high print velocities. Use patterns like Cross Hatch, Gyroid or Honeycomb instead. Patterns like Cross Hatch offer a good balance of strength and speed along with requiring less infill density (%) than other patterns to achieve the same coverage.

see aligning the gantry

• Tune Extruder Rotational Distance
• Tune flow ratio
• Tune Pressure Advance

Properly set z-offset

• Retract between layers and enable z hop on retraction
• Avoid crossing perimeters