How to Plan a Multi-Station Vise Layout on One CNC Table

The short answer: count usable stations, not empty table area

A multi-station layout is useful only when every station can be loaded, cleaned, machined and checked without blocking the others. Do not divide table length by vise width and call the result complete. The open jaws, the largest blank, part overhang, toolholder sweep, probe, door and handling route all use space too.

Begin with a scaled drawing of the machine's usable table area. Place the exact vise, jaw and mounting drawings on it. Add the largest part assigned to each station. Draw the path used to bring the blank in and take the finished part out. Reserve routes where chips and coolant can leave. The count that survives those checks is the first workable count.

Next, decide whether every station runs the same part or whether the table carries a controlled mix. Give each active station an identity, setup sheet and inspection plan. Prove one agreed first piece from every station after installation and after any change that can affect location or clearance.

1. Draw the usable table before choosing station count

The machine table drawing is the starting point, but the full table outline is not always usable. Bolts, locating keys, tombstones, probes, tool-setting devices and travel limits can remove areas from the plan. Doors and guarding can also limit where a person or approved handling device can reach.

Ask the machine builder or your engineering team for the current table drawing, allowed mounting zones and load limits. Mark areas that must remain clear. If the table already has a plate, include its holes, keys, clamps and edges. Do not assume a drawing for another machine or another plate is close enough.

Now place one complete station. A station includes more than the vise body. Show its mounting hardware, jaw travel, the blank, the finished part and anything that locates the part. If a part projects beyond the jaw, draw that overhang at its largest point. Copy the complete station only after the first one has a real envelope.

2. Set station pitch from the largest working envelope

Station pitch is the center-to-center distance between neighboring stations. It is not the small visible gap between two vise bodies. Choose it from the largest space each station will use during loading, clamping and cutting.

Start with the selected model drawing. For example, the catalog lists the NT-S52P210V2 at 77 × 210 × 87 mm and 4.4 kg, with a 0–200 mm clamping range. It lists the NT-S96P210V2 at 125 × 210 × 111 mm and 10.8 kg, also with a 0–200 mm range. These are model-specific planning inputs. They do not prove the mounting pattern, jaw envelope or fit of another model.

Add the chosen jaws in their fully open position. Add the largest blank and any stop or locator. Then add clearance for the real toolholder, not just the cutting edge. A short tool near one station may pass while a larger holder hits the next part. Check the actual program path and every tool that enters the shared space.

Leave access to seat the part and confirm that it is against the datum. The person doing the work should be able to see or verify the locating surfaces named in the setup sheet. If the part uses a crane or lifting aid, draw the suspended load and the hardware that remains attached during placement.

There is no standard gap that is safe for every layout. Record the final pitch on the setup drawing. If jaw size, part overhang or loading method changes, review the pitch again rather than relying on the previous station count.

3. Prove the loading and unloading path

A clear station can still be hard to load. Walk through the task from the moment the machine door opens. Where is the blank picked up? How is it held? Which jaw opens first? Which surface must contact the datum? Where do hands, lifting hardware or an approved loader pass?

Draw that route from a useful side view as well as from above. The path must clear the door, enclosure, neighboring parts, jaws, tools and probes. It must also work when the nearest station is already loaded. If an operator cannot reach the inner station without leaning over a sharp part or another setup, the row needs a different order or more space.

For manual handling, follow the shop's lifting and machine-safety rules. For powered or automatic loading, the complete cell needs its own controls and safety review. A vise layout alone does not prove safe robot reach, sensing or recovery after a fault.

4. Reserve space for chips, coolant and cleaning

Stations placed too closely can form pockets where chips collect. The problem is not only a messy table. Chips on a locating or seating surface can change how a part sits. A hidden pile can also block a jaw, cover a fastener or make the next load hard to inspect.

Show how chips and coolant can leave each station area. Keep the locating faces and seating surfaces visible enough to inspect and clean by the approved method. Leave access around bolts, keys and part stops. Do not create a narrow channel that cannot be reached once all stations are installed.

Chip behavior depends on the material, cutter, toolpath, coolant and part shape. A fixture drawing cannot prove it. Run a representative cycle, stop under safe conditions and inspect the gaps, jaw pockets and table surface. Repeat the check after enough parts to reveal buildup, not only after one clean demonstration.

Record what must be cleaned at every load and what needs a planned inspection. If a neighboring station traps chips, change the spacing, shields, sequence or process before release. Do not solve the issue with an unsupported claim that any vise layout is self-cleaning.

5. Make mixed-part flow deliberate

A table can carry the same part at every station or a controlled mix of parts. The mixed option is not simply any open station taking any job. Each position needs a defined part, jaw set, datum, program step and inspection requirement.

Give the stations stable names such as A, B and C. Put the same names on the layout, setup sheet and program notes. If a jaw or stop belongs only at station B, identify it there. Use clear part identification so a blank cannot be loaded into a station with a similar-looking but different setup.

Check the full cycle with all planned parts present. One tall part can change access to a short part beside it. A long tool used at station C can enter the space above station B. The safe result depends on the combined layout, not on each station passing a separate check while the others are empty.

Do not promise higher output from station count alone. More parts per cycle may reduce door openings, but it can also lengthen loading, inspection and the machining cycle. Compare the complete approved process with the current one using shop data. Keep the article's layout decision separate from any payback claim.

6. Check table load after the layout fits

A row that fits by area may still exceed the machine's allowed load. Add the mass of every vise, jaw set, mounting plate, fastener, locator and maximum blank. Use the exact selected models. The 4.4 kg and 10.8 kg examples above belong only to NT-S52P210V2 and NT-S96P210V2.

Compare the complete setup with the machine builder's rules. Include any limit that applies to the table position or motion. Do not compare one vise weight with the total table limit and assume the full row is accepted. Record the calculation with the layout so a later station or heavier blank cannot be added without review.

7. Release every active station with a first piece

Turn the approved layout into a setup sheet. List the station identity, vise and jaw set, part, datum, loading order, clamp method, program and inspection features. Add the final pitch and any keep-out dimensions that an operator can verify.

Install the hardware on clean surfaces and check it against the drawing. Confirm fasteners and operating steps by the manufacturer's instructions and the shop's process. Load representative blanks. Before cutting, prove the program under safe conditions and verify that tools, holders and probes clear all active stations.

Cut one agreed first piece from every active station. A good part from station A does not prove station B. Inspect the features that can reveal wrong seating, station location or setup error. The drawing owner and process owner should agree on the method and limits before the run.

Record the result by station. Release the batch only when the named owner accepts it. Repeat the relevant checks after moving a vise, changing jaws or stops, revising the program, assigning a new part, or changing anything that can affect the layout.

What to send for a useful layout review

Send the machine model, table drawing, allowed mounting and load information, and any existing plate drawing. Add the selected vise model and drawing, jaw details, largest blank and finished-part models, part weight, and the part assigned to each station.

Include the tool list and holders, probe or tool setter, loading method, door or enclosure limits, chip and coolant method, and the planned station sequence. Mark the critical first-piece features and who can approve them. These inputs let an engineer discuss a real layout instead of guessing from table size.

NEXTAS can review self-centering vise options against those inputs and identify questions that still need machine-builder or process-owner approval. The review is not a substitute for the machine manual, risk assessment, program proof or first-piece inspection.