Here is a great write up from
These are the installation photos on my Harbor Freight Milling Machine.
Installation is complete. I mounted the scale and reader on the front of the table as rear mounting limits the table in the Y axis.
X axis front mounting required the shield to be cut down on the bottom to have access to the table tightening screws.
X axis scale and reader mounting with shield removed. Both units are mounted directly to machine.
Y axis installation with shield removed. Scale is mounted on a cut down piece of aluminum angle that has been notched to clear table hand wheel assembly. Reader is mounted on a cut down piece of aluminum angle as well. Hand wheel was removed for photo.
Photo shows mounting of reader onto machine base.
Y axis scale and reader with shield installed.
Mounting of DRO unit and cables.