Metal Mill

Metal Mill

The metal mill is a Precision Matthews PM25-MV mill with a CNC conversion kit from Arizona Video and a Centroid Acorn controller.

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    PM25-MV Mill Features:

    • 1 HP DC Brushless Motor and Belt Drive - very quiet
    • Max. Drilling Capacity 1″
    • Max. End Milling Capacity 3/4″
    • Max. Face Milling Capacity 2/1/2″
    • Table Size 27-1/2″ x 7-1/8″
    • Cross Travel (Y Axis) 7″
    • Longitudinal Travel (X Axis) 19″
    • Table Leadscrew Pitch 10 TPI (.100″ Per Turn)
    • Table Dial Graduations .001″
    • Vertical Travel (Z Axis) 13″
    • Max Distance Spindle to Table 13″
    • Taper of Spindle R-8, w/7/16-20 Drawbar Thread
    • Spindle Travel 2″
    • T Slot Size Actual size 12mm, our 1/2″ kit listed is sized for this machine
    • Range of Spindle Speeds 50-2500rpm, 2 Steps

    Centroid Acorn Controller Features:

    • Up to 4 axis Step and Direction, Open Loop
    • 8 inputs and 8 Outputs
    • One Encoder input
    • 1 analog output (0-10 vdc for VFD control)
    • On board Motion Control CPU
    • Ethernet communication to CNCPC


    Important safety information.

    • Keep fingers clear when operating !
    • Safety Glasses must be worn when operating the mill

    Getting Started

    The process for creating a part using the mill is:

    • Design/create the part using a CAD program like OnShape, SolidWorks, FreeCAD, or Fusion360.
    • Generate instructions to tell the mill how to move to create the part. These instructions are called G-code because many of the instructions start with the letter 'G'.
    • Load the G-code onto the PC by the mill
    • Install the cutting tool into the mill. This must be the same one you specified when you created the G-code.
    • Turn on the mill using the power strip next to it labelled "Mill"
    • Start the CNC12 mill program on the PC
    • Clear the reset button in CNC12 by clicking it
    • Move the mill to the starting location on the part
    • Click the "Home" button in CNC12
    • Load the G-code file into CNC12
    • Start the spindle and set the RPM
    • Click "Cycle Start" to have CNC12 execute your G-code.

    Fox.Build keeps the following endmills in stock for your use:

    • Flat center cutting 2 Flute endmills:
      • 1/8, 3/16, 1/4, 3/8, 1/2, 5/8, 3/4 inch diameter
      • 2mm diameter
    • Flat center cutting 4 flute endmills:
      • 1/8, 3/16, 1/4, 3/8, 1/2, 5/8, 3/4 inch diameter
    • Ball endmills, 2 flute:
      •  1/8 inch
    • V-cut endmills:
      • 20 degrees
      • 60 degrees

    If you need a cutter not listed you may supply your own or ask us about it. Depending on the particular cutter we may be able to supply it for you.



    Metals (including steel, aluminum, and brass), plastics

    Power and Speeds

    Feeds and Speeds should be calculated by the CAM program that generates the G-code to operate the mill.

    Tips and Tricks


    Owner Fox.Build
    Precision Matthews
    Model PM25-MV
    Serial #
    Instructions centroid-cnc12-mill-manual-v4.14
    19x7x13 Milling area