Two Trees TTC6050 CNC

About the Machine

The TTC6050 CNC is Two Trees' largest desktop router, with a 600 x 500 x 100mm (23.6 x 19.6 x 3.9 in) working area. It runs a 500W spindle motor at up to 12,000 RPM, driven by linear guides and ball screws on all three axes.

Cut Settings on this Machine

Every cut starts with one formula: Feed Rate = Spindle Speed (RPM) x Chip Load x Number of Cutting Edges (flutes). Chip load is the thickness of material each cutting edge removes in one revolution of the bit. This number comes from the manufacturer of the bit, which publishes a chip-load chart for each bit diameter and material. Look up your exact bit and material, start from the middle of the published range, and you have the third number in the formula. The chart below shows the recommended spindle speed for each material and bit type.

The TTC6050's 500W spindle tops out at 12,000 RPM, in range for most of the chart. Ball screws and linear guides on all three axes make this a stiffer machine than a lead-screw desktop router, so it holds a cut better and can push a bit more feed rate before it chatters. Depth per pass is still where the machine's build sets the limit: a truly rigid machine with a powerful spindle can cut as deep as the bit is wide in a single pass, but that takes real spindle torque, a drive train and clamps that hold firm, a gantry that will not flex, and enough mass to soak up vibration. Work up to deeper passes gradually rather than assuming the machine can take a full-diameter cut right away. Push too deep and the bit deflects and chatters, leaving scalloped edges, or it rubs instead of cutting and burns the material. The fastest way to dial in a cut is to see what has already worked for other people.

Worked example for feed rate: 1/8in (3.175mm) two-flute solid carbide end mill in hard wood. The chart says 16,000 RPM, but this spindle tops out at 12,000 RPM, so run 12,000. With the bit maker's 0.025mm per tooth (0.0010 in): 12,000 x 0.025 x 2 = 600 mm/min (24 in/min) feed. For depth per pass, start shallow and check Community Cut Settings in Easel for what works on this machine. If the cut sounds strained, reduce the depth, not the feed. Slowing the feed below the chip load makes the bit rub instead of cut.

Community Cut Settings shows the spindle speed, feed rate, and depth per pass other makers actually run for your machine, material, and bit.