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.
| Material | Solid carbide bit (RPM) | HSS & carbide-tipped bit (RPM) |
|---|---|---|
| Plastic (hard & soft) | 18,000 | 8,000 |
| Soft woods (MDF, particleboard, etc.) | 22,000 | 10,000 |
| Hard wood (oak, maple, etc.) | 16,000 | 7,000 |
| Aluminum | 12,000-14,000 | 5,500 |
| Aluminum, softer grades (such as 3003) | 10,000 | 5,000 |
| Foam (harder foams; soft foams do not rout well) | 18,000 | 8,000 |
| Composites | 12,000 | 5,000 |
If this machine's spindle cannot reach the listed speed, run the spindle at its maximum and control the cut with feed rate. For 65mm trim routers, the DeWalt DW611 dial maps to: 1 = 16,000; 2 = 18,200; 3 = 20,400; 4 = 22,600; 5 = 24,800; 6 = 27,000 RPM.
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. 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 the Two Trees TTC450 Pro CNC. 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.
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Using this machine with Easel
The TTC450 Pro CNC runs GRBL_ESP32 on an MKS DLC32 board. Easel’s live control, the Easel Driver and Rapid Connect, works with classic GRBL and FluidNC over USB, so it does not carve this machine in real time. Use Easel to design and generate toolpaths, then export the G-code and run it from the machine’s own controller: its ESP3D web interface, or by USB, WiFi, or SD card. Because Easel’s G-code is standard GRBL, it runs as-is. Select TTC450 Pro CNC in Easel’s machine menu to size the canvas.
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