Please see if the machine needs to be lubricated.
This is a bit complex for a Nomad 3 since there are multiple systems/lubricants.
For the Z-axis linear rails and blocks, use Mobil Vactra No. 2:
Shapeoko 5 Pro and HDM Maintenance Kit - Carbide 3D
For X- and Y-axes, use Superlube:
Care and Cleaning for Nomad 3