![]() ![]() Each axis can exert over 135 pounds of cutting force that is reacted by 1” thick steel bearing mounts. Pushing the spindle around are precision 1205 ball screws driven by NEMA 23 waterproof stepper motors. The ISO-ER20 taper of each is precision ground in-house to ensure runout is less than 0.0003”.ĭon't have 220V power in your shop? Consider picking up a transformer to run our spindle motor on any ordinary 110V outlet. The spindle itself is custom made from high grade alloy steel and through-hardened for wear resistance. All without violating the SFM specs provided by the cutting tool manufacturers for carbide and high speed steel. Our Spindle can run fly cutters, drills, boring heads, and large end mills. Trim routers and low torque VFD driven spindle motors don’t belong on a machine designed for milling metal, especially steel. When it comes to machining metals, torque is king and this beast of a spindle motor has plenty to give. The built-in encoder means that the motor can maintain its programmed speed even under heavy loads. The 1:2 overdrive transmission allows the user to pick any cutting speed in software up to 8000 RPM. The 220 V AC servo motor packs a whopping 3.4 horsepower and nearly constant torque from 0 to 4000 RPM. The spindle motor is the heart of the machine, and we did not skimp here. An additional 2” of static Z-axis travel is available by adjusting the vertical spindle mounting position. Cast iron was chosen for its superior stiffness and vibration damping. The working surfaces are precision machined and 100% inspected to ensure that our quality requirements are met. Keeping with the ‘aluminum has no place on the frame of a CNC mill’ theme, the X axis and Y axis carriages are made out of gray cast iron. It is machined and 100% inspected to exacting standards to hold a pair of 20mm linear guideways right where they need to be for supreme accuracy. The heavy duty gantry is constructed from 5/16” steel plate all the way around for maximum bending and torsional stiffness. There are no aluminum extrusions found here. Riding on the Y axis rails is the beefy X Axis gantry. The direct connection to the concrete base structure keeps deflections to a bare minimum while providing a direct path for vibration damping. To these mount the 1” thick steel Y axis rails containing the 20mm linear guideways. The legs come pre-drilled for attaching accessories such as leveling feet, computer stand, or touch screen controller (all available for purchase).Īlso encased in the concrete base structure are the steel Y axis rail supports. This means you don’t need to buy or build a workbench like most hobby machines. The base is designed to be skim cut flat by the user to produce a laser flat surface that is exactly parallel to the XY plane of the machine.įour steel legs support the machine making it a freestanding unit. The table is rigidly encased in 300 pounds of high strength interlocking concrete to promote excellent rigidity and stability. ![]() MR-1’s table is a nearly ¾” thick plate of 6061-T6 aluminum that is drilled and tapped for ¼-20 tooling holes in a 2”x2” grid pattern making workholding a breeze. MR-1 is not a toy it is a machine that you can rely on to make real metal parts that require excellent finishes, precision, and accuracy. The MR-1 Gantry Mill stands alone as the only machine in its price class that is capable of productively machining aluminum, steel, titanium, and stainless steel. Co-Planarity Check Gage - now standard on MR-1.To learn more about the concrete reinforced base design and more information on this assembly step, please visit MR-1 Base Design. Seven 50lb bags of concrete must be purchased separately from a local home improvement store. Note: Does not include concrete required for the base. All miscellaneous parts and hardware required to assemble a ready-to-run machine.⅛ and ¼ Precision ER20 Collets and 2 Collet Wrenches.3.4hp 220V AC Servo spindle with 0-8000 RPM speed range - adjustable in software.Motion Electronics package including the following: Waterproof NEMA 23 stepper drive motors, Limit switch kit for each axis, Touch Probe and Tool Setter ports, Expansion ports for future add-ons, E-stop Switch, and High Speed USB Connectivity (Windows or Mac Compatible).
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