Two Trees TTC450 Pro CNC

About the Machine

The TTC450 Pro CNC is Two Trees' 460 x 460 x 80mm (18.1 x 18.1 x 3.14 in) desktop router. The base kit ships with a 775 brushed spindle motor, stated to run 8,000 to 30,000 RPM depending on installation, and a T8 4mm lead screw drive; higher-wattage spindle bundles are also sold as variants of this same product.

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.

Two Trees states the TTC450 Pro's 775 spindle runs 8,000 to 30,000 RPM depending on installation, without a single fixed maximum, so check the plate on the spindle you actually have before you start. Small brushed spindles lose most of their torque at the top of that range, so if you are unsure, dial the speed back rather than running flat out, and control the cut with feed rate instead. Depth per pass is where the machine's build matters. 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. This lead-screw desktop machine falls short of that bar, so take shallower passes: 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. Two Trees states this spindle's range as 8,000 to 30,000 RPM depending on installation rather than one fixed maximum, so check the plate on yours; the example below keeps the generic 16,000 RPM chart value. With the bit maker's 0.025mm per tooth (0.0010 in): 16,000 x 0.025 x 2 = 800 mm/min (31 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.