Openbuilds WorkBee 1510

About the Machine

Openbuilds has shut down and no longer sells this model, but it remains fully supported in Easel for existing owners. The WorkBee 1510 has an 824 x 1280 x 76 mm (32 x 50 x 3 in) working area and GT3 timing belt drive on the X and Y axes with a lead-screw driven Z axis (8mm acme lead screw), based on the open-source WorkBee design by Ooznest's Ryan Lock. It was sold as a bundle: motors, the BlackBox controller, and a spindle (RoutER11 or DeWalt DWP611) were order-time add-ons, not included by default.

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 WorkBee 1510 was sold as a bundle: motors, the controller, and a spindle were all order-time options rather than included parts, so its actual RPM and rigidity depend entirely on what the original builder chose. GT3 timing belts drive the X and Y axes while the Z axis runs on a lead screw, rather than ball screws throughout, which trades some rigidity for speed, and OpenBuilds' own accuracy spec for this model is looser than its lead-screw siblings. 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 belt-driven, largest-footprint machine in the lineup falls well short of that bar unless heavily built out, 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: since this machine was sold without a spindle included, check your router's plate or speed dial for its actual RPM and use that number instead. 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.