New Generation Of HMCs

The EC-400 HMC from Haas is a T-base horizontal machining center with a work cube of 20" x 20" x 20", a dual pallet changer with 400-mm pallets and a built-in rotary indexer. The HMC comes standard with an 8,000-rpm, 40-taper spindle powered by a 20-hp vector dual drive system. Also standard is a side-mount tool changer (24+1 tools), 1,000-ipm rapids and a high-volume coolant system.

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The EC-400 HMC from Haas is a T-base horizontal machining center with a work cube of 20" x 20" x 20", a dual pallet changer with 400-mm pallets and a built-in rotary indexer. The HMC comes standard with an 8,000-rpm, 40-taper spindle powered by a 20-hp vector dual drive system. Also standard is a side-mount tool changer (24+1 tools), 1,000-ipm rapids and a high-volume coolant system. To eliminate downtime associated with manual chip removal, the EC-400 is equipped with a triple-auger chip conveyor system that removes chips from the enclosure quickly and efficiently, according to the company. A belt-style chip conveyor is also available.

A 12,000-rpm spindle powered by a 30-hp vector dual drive system is available as an option. This spindle provides additional horsepower for heavy cuts, as well as 50 percent more speed for high speed machining operations, the company says. Both spindles feature an inline, direct-drive system that couples the motor directly to the spindle rather than using belts or gears. This results in less vibration, less heat and less noise than other drive systems, providing better surface finishes, extreme thermal stability and quiet operation. On-the-fly wye-delta switching provides low-end torque and a wide constant horsepower band, without having to stop the spindle to change windings.

The HMC comes standard with a pallet indexer that provides 45-degree incremental indexing for multi-sided tombstones. For accurate positioning of multi-faceted parts, a high-precision face-gear indexer with 1-degree indexing is available as an option. A fourth-axis rotary table is also available for shops requiring simultaneous four-axis motion, and a fifth axis can be added for complex work.

The servo-driven pallet changer swaps pallets in just 8 seconds, and each 400-mm pallet has a load capacity of 1,000 lb (660 lb with fourth axis). A separate load station allows the operator to safely load/unload parts or change fixtures on one pallet while parts are being machined on the other, keeping spindle run time at a maximum.

The machine also comes standard with a side-mount tool changer that holds 24 tools plus one in the spindle. A double-arm gripper swaps tools in just 2.8 seconds, the company says. To further reduce cycle times and increase tool capacity, a servo-driven 40-pocket SMTC is available that is said to reduce tool-to-tool times to 1.6 seconds.