Automatic Pallet Changer (APC) for CNC

An APC automates pallet exchange at a CNC machine so the next fixture can be prepared off-machine. Unattended operation depends on material supply, tool life, guarding, interlocks, fault recovery and acceptance of the complete cell; pallet exchange alone does not establish those conditions.

Pallet size, payload, controller and exchange time depend on the selected layout. The catalog lists 200 kg for front-loading, 350 kg for side-loading or four-station, and 1,500 kg for the gantry configuration. The layout table lists manual dual-station and front-loading at 60,000 N and 600 kg lift, side-loading and four-station at 90,000 N and 900 kg lift, and gantry at 120,000 N and 2,000 kg lift. Conveying speed printed with the four-station spread is 300 mm/s. The layout table lists an air-tightness testing range of ±0.01 mm, separate from the 0.005 mm datum repeatability. Confirm exchange time from the loaded pallet, travel, guarding, PLC handshake and machine interlocks during acceptance. The catalog publishes no single loaded exchange-time figure. Use the layout table for transport and lift. Banner and takt-comparison pages are catalog marketing — measure exchange on the selected cell. The takt comparison prints workpiece changeover 15–45 min to 0.5–2 min, effective machining 4–4.5 h to 7–7.5 h per shift, and setup 2–4 h to 10–20 min. A banner states clamping force up to 60,000 N and automatic lifting force up to 1,350 kg. The four-station spread prints 300% efficiency, 40% yield, and utilization over 95%.

Controller, I/O, PLC, protocol, firmware, and handshake compatibility must be confirmed for the exact machine and project signal list. Compatibility is the signal list for that machine. There is no single list for every controller brand.

The catalog shows light curtains, guarding and sensing on specific APC layouts. The project risk assessment must define the required protection, safe stop, energy isolation and fault recovery. Seating and clamping sensors provide process confirmations unless their safety function is specifically designed and validated; confirm the complete cell through FAT/SAT or equivalent acceptance.

An external loading station lets an operator prepare the next pallet while the machine processes the current job, subject to the approved guarding and work procedure. The actual reduction in stopped-spindle time depends on part mix, cycle time, pallet count and staffing and must be measured on the selected layout.

Integration starts with the site layout, mechanical mounting, controller signals and safety assessment. Confirm commissioning, acceptance tests, operator and maintenance training, and the required records in the project quotation; the scope varies with the machine and configuration.

Model payback from this shop’s baseline: part mix, batch size, shift pattern, available unattended hours, integration scope, and total implementation cost. The 2026 automation catalog prints machine utilization 50%–90%, capacity gain 60%–200%, and a payback period of 6–18 months on the pallet-changer takt comparison. Calculate yours from measured setup and cut time. Catalog Case 1 on that page, a vertical machining center with a dual-pallet system, reports monthly productivity up 66.7% and a 6-month payback. Catalog Case 2, high-mix, low-volume production of large precision parts, uses the same equipment, a vertical machining center with a dual-pallet system, and reports monthly productivity up 84% and an annual cost reduction of RMB 456,000. Later spreads print utilization over 90%.

Send the machine brand/model and table size, intended pallet size, part-plus-fixture mass, whether the route is manual exchange, automatic APC or still undecided, controller or I/O notes, and the target changeover or queue. These details help us recommend a model and review the interface. We will confirm which drawings and CAD are available for the selected configuration.