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Taig Micro Mill Digital Read-Out (DRO)

This DRO modification has been removed for the CNC conversion but this information has been retained for reference.

Taig Micro Mill X Y Z Axes ScalesTaig Micro Mill Tachometer & SFMTaig Micro Mill CNC

RF-25 Mill 
RF-25 Mill DRO & X Y Z Axes Scales. RF-25 Mill Tachometer & SFM
9x20 Lathe, 9x20 Lathe DRO X & Z1 Axes Scales.  9x20 Lathe Tachometer & SFM  Taig Micro Lathe DRO
ShumaTech DRO


Completed DRO system for the Taig manual mill, adapted from my Rong Fu RF-25 modifications.
The L-channel serves as scale mounts while protecting them from impact, fluid & debris.
All L-channel bracket corners have been rounded to increase safety.


Pre-DRO Taig mill with 18" table having 12" of travel.
Note the table lock cap-head screw & the pre-mod long, ⅜" dowel pin hard stop in the center.


The Taig uses one, 12" scale for the X-Axis plus two, 6" scales for the Y & Z-Axes.
The smaller, horizontal-type scale fits best for the space-restricted, X & Y-Axis applications.
The SPC receptacle has been improved over that shown for the Taig Z-Axis;
it now fully encloses the plug when inserted.


Used Function 5 to define & Function 6 to select tool diameter offsets for milling the enclosure.
The two-flute, end mill is ⅛" in diameter. This setup is on my RF-25 mill.


Inside view of the enclosure's bottom-mounted, aluminum bracket.
This type of enclosure still flexes a little.


Adding a deep red filter really enhances the LED display contrast.
I punched five holes that fit over the status LEDs to hold the filter in place.
The holes should be loose so the filter floats in place & does not warp when the display heats it up.
The five LED indicators have circular (punched) red filters that are placed into the front enclosure holes.


An upper bracket that both swivels & tilts. U-bracket was cut from an extrusion.


Bottom bracket detail using an 80/20 extrusion.


The DRO is mounted directly onto the table for rigidity & serves to isolate it from the mill's column.

The cables run up through holes in the base & inside the back channels of the 80/20 extrusion.
Black plastic (80/20) inserts are snapped into the channels to hold the cables in place.


SPC cables are from LMS. All cable plugs are held in place with a spot of hot glue.
A 100μf, 10v tantalum capacitor was soldered into each of the battery compartments.
I have the DRO plugged into a surge protector.

Taig Micro Mill X Y Z Axes Scales    Taig Micro Mill Tachometer & SFM