Makino SLIM3n APC

The Makino SLIM3n APC is the pallet-changer version of Makino's SLIM3n production vertical. An integral pallet changer lets the operator set up a part on one pallet while the machine cuts on the other, and each pallet measures 550 mm x 300 mm (21.6 in x 11.8 in). Travels are 500 mm (19.7 in) in X and 400 mm (15.7 in) in Y and Z.

The reason to choose it is spindle time. On short cycles, loading and unloading can take as long as the cutting, and moving that work outside the machine is where the throughput comes from. The trade is pallet size: the fixed-table SLIM3n offers 600 mm x 400 mm (23.6 in x 15.7 in), so fixtures for this machine have to be designed for the smaller pallet. Workpiece weight is 400 kg (881 lb). Makino gives the size limit as ⌀1,200 mm x 475 mm (with limitations), which reads as a swing diameter and height inside the enclosure; with a pallet this small, ask Makino what the limitations are before planning a large part.

The HSK-A50 spindle comes in two specifications, 16,000 rpm as standard and 8,000 rpm as the alternative. Rapids reach 50,000 mm/min (1969 ipm), and cutting feed is 1 - 20,000 mm/min (0.04 - 787 ipm). The closed frame with twin long columns was laid out using finite element analysis.

A 26-tool ATC magazine with an armless, direct tool pick is standard, behind an integral door that needs no separate actuators. Nozzle and flush coolant are standard, the structure slopes for chip evacuation, and a lift-up chip conveyor can be added at the rear.