Steve wrote: I chose to attach the X-axis glass scale to the rear of the compound slide and saddle of the Grizzly G4003G. This area will be clear of chips and oil. One problem . . . . 

. . .  is that the saddle area protruded out from the cross slide causing the scale to cover the oil ports on the saddle.

 This shows the saddle after milling. It will allow the scale to be mounted flush against the compound slide.

I also milled a slot for the reader cable to pass through shown with a blue arrow.

The X-axis is mounted flushed against the compound slide.

This shows how the notch allows the cable to pass under the scale.
I used a ball end mill to make the notch.

The instructions recommend a gap of  1.2mm to 1.5mm between the reading head and scale. I used a feeler gauge shown above to set the gap. I then used a transfer punch
to mark the reading head attaching bolts.

You will also notice a red dot on each end of each scale. There is also an arrow in the center of the reading head. Make sure when mounting the reading head that the area to be measured falls between the two red dots. The two scales provided allow more than enough room for this.

Note: You do not have to be concerned on which direction the reading head moves. The direction can be changed easily for either axis from the set up control panel.

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Please continue to read Mounting Z-axis linear scale on the Grizzly G4003G in Part C.

This guide is originally written by Steve and permission was given to use it here.