How Much Time Does NC Servo Feeder Commissioning Take?
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- David Park - Senior Stamping Engineer, FANTY Machinery
- Issue Time
- Oct 7,2026
Summary
A single-speed NC servo feeder takes three to four days to commission properly, and a high-speed line with servo pilot release takes five to six. This article walks the eight steps in order with a time budget for each, from levelling the base at 0.05 mm per metre through feed length calibration to a twenty-part capability trial at full speed. It names the three checks that decide long-term accuracy and the four ways a completed commissioning checklist still proves nothing.
The machine arrives on a Tuesday and the production plan assumes it will be running by Friday. That assumption is where most commissioning arguments start.
A single-speed NC servo feeder takes three to four days to commission properly. A high-speed line with servo pilot release takes five or six.
This article sets out the eight steps in order, the time each one should take, and the three checks that decide whether the line will still hold accuracy six months later.
It also names the parts of commissioning that prove nothing, which is the more useful half of the schedule.
Commissioning is not installation. Installation puts the machine in the building. Commissioning makes it repeatable.
Those are different jobs with different durations, and conflating them is why schedules slip.
Budget the Commissioning Before the Machine Lands
Build the time budget into the purchase order rather than the production plan. A line that is scheduled to run on day three of a five-day commissioning will be run badly.
Three inputs decide the duration, and all three should be known before shipment.
Line speed. Below 100 strokes per minute, the feed roll gap and pilot release can be set by trial. Above 200 strokes per minute, both need measuring rather than feeling.
Material thickness range. A line that runs one thickness commissions faster than one that must switch between 0.8 mm and 3.0 mm every week.
Who owns the die. If the die is late or unproven, the last two commissioning steps cannot be completed, and the schedule stops regardless of how well the machine was installed.
Who Should Be in the Room
Commissioning runs faster with four people and slower with a crowd. The four that matter are easy to name.
The commissioning engineer from the machine builder, who owns the alignment and calibration sequence.
A maintenance fitter from your plant, who will own the machine after handover and should see every setting being made.
A setter or line operator, who needs to learn what a correct feed sounds and looks like while the engineer is still on site.
The tooling engineer, present for the last two steps only. If the die is not there, the feed length can still be calibrated, but pilot release timing cannot be proved.
Nobody else needs to be in the aisle. Extra observers slow down alignment work and create noise around the measurements.
Steps 1 to 4: Getting the Machine Into the Line
The first half of commissioning is mechanical and electrical. Get it wrong here and every later step inherits the error.
- One. Mount and level the base. Anchor bolts torqued, base level to about 0.05 mm per metre, and no shim stacks left loose under the feet. Four to six hours including grout cure.
- Two. Set the pass line to the die shoe. This is the step that gets rushed. The strip must enter the die at the height the die was designed for, typically within 0.1 mm.
- Three. Set the feed roll gap and pressure. Gap clearance is normally 0.02-0.05 mm below strip thickness, set with the material in the rolls rather than against a gauge block.
- Four. Wire the drive and encoder, then home the axis. Confirm rotation direction under jog before enabling full speed, and check the encoder count moves in the expected direction.
Steps one and two carry most of the risk. A machine levelled to a sloppy tolerance will feed acceptably at low speed and drift at 200 strokes per minute.
Steps 5 to 8: Making It Repeat
The second half turns a machine that moves into a machine that repeats. This is where accuracy is actually created.
- Five. Calibrate feed length against a measured strip. Command 10 feeds of 100 mm, measure the total with a steel rule or caliper, and correct the pulse-per-millimetre constant. Never calibrate against the display.
- Six. Set pilot release timing. Release early enough that the pilot pins can pull the strip, late enough that the feed rolls still hold it. On a 200 SPM press this window can be under 40 milliseconds.
- Seven. Set loop control with the upstream equipment. Slack loop depth and sensor position have to allow the coil to unwind without tugging the strip. Two hours is realistic, less if the sensor was pre-set at the factory.
- Eight. Run a capability trial. At 25%, 50% and 100% of line speed, take twenty consecutive parts per speed and measure the feed dimension. That is the record that proves the line.
Steps five and eight are the two that buyers actually care about, and they are the two most often cut short when the schedule slips.
What Each Step Should Take
The times below are for a line with one material and a proven die. Add roughly 40% if the die is new or the material range is wide.
| Step | Time Budget | Where It Costs You If Skipped |
|---|---|---|
| 1. Mount and level | 4-6 hours | Vibration and drift at speed; correcting it later means re-anchoring under production pressure |
| 2. Pass line to die shoe | 2-3 hours | Die wear on one side, and a feed error that no calibration constant will remove |
| 3. Roll gap and pressure | 1-2 hours | Marked strip or slip, depending on which way you guess, and both show up as scrap |
| 4. Drive and encoder | 3-4 hours | Inverted direction at first start, which is cheap to fix now and expensive at 200 SPM |
| 5. Feed length calibration | 2-3 hours | Every part made afterwards is offset by the same error until someone re-measures |
| 6. Pilot release timing | 2-4 hours | Bent pilot pins, torn strip, and a die repair that costs far more than the setup time |
| 7. Loop control | 1-2 hours | Strip tugging at the coil, which adds a variable error that comes and goes with coil weight |
| 8. Capability trial | 4-6 hours | No baseline. Six months later nobody can say whether accuracy has degraded or was never there |
Add the numbers up and a single-material line lands between 19 and 30 hours of actual work. That is three to four working days once you allow for breaks and a die that arrives late.
The Three Checks That Decide Accuracy
If you only document three things from the whole commissioning, document these.
Feed length measured on the strip. Ten commanded feeds of 100 mm should measure 1,000 mm within about 0.2 mm total. Record the correction constant and the material it was set on.
Pilot release measured at the press. Use a proximity sensor and a scope or a high-speed input on the control. The manual figure is a starting point, not a setting.
Twenty consecutive parts at full speed. Feed dimension spread across twenty parts is the number that predicts next year's scrap rate.
A machine that holds ±0.05 mm on the first five parts and ±0.2 mm on the next fifteen is not commissioned.
FANTY holds ±0.05 mm on these lines and runs them to 200 strokes per minute in test, but that figure belongs to a specific material and die combination. Your commissioning record is what makes it yours.
Where a Commissioning Checklist Fails
A completed checklist is evidence that a sequence happened. It is not evidence that the line will hold accuracy, and it is worth being direct about the gap.
It proves the machine at commissioning speed, on commissioning material. A coil that is 0.03 mm thinner than the sample will change the roll gap behaviour, and nothing in the checklist will have recorded that.
It cannot prove the die. A perfectly commissioned feeder pushing a die with a worn pilot will still tear strip, and the record will not show why.
It expires. Roll wear, encoder drift and hydraulic pressure loss all move the numbers over months. A commissioning record from two years ago describes a machine that no longer exists.
It measures the machine, not the process. Two plants can hold identical commissioning records and very different scrap rates, because the difference sits in coil handling, lubrication and operator practice.
The honest use of a commissioning record is as a baseline for the next measurement, not as a certificate.
Handover: What to Sign and What to Record
Handover is a documentation exercise, and it is the part most plants do worst.
Record the settings, not the result. Feed length accuracy without the roll gap, pressure and pulse constant beside it cannot be reproduced after a roll change.
Photograph every gauge and display at the end of the capability trial. A photograph takes ten seconds and settles most disputes about what was agreed.
Sign against the trial data, not against the machine being present. Acceptance means twenty consecutive parts within tolerance at full speed.
Book the 30-day review before the engineer leaves site. It is the cheapest way to catch a setting that has drifted since commissioning.
The coil line guide library sets out the full error budget from the decoiler through to the die, which is where the remaining fraction of a millimetre usually hides.
Machine configurations are listed on our products index.
How many days should a 200 SPM NC servo feeder take to commission?
Plan five to six working days with a proven die, or seven to eight if the die is new. The capability trial alone accounts for one of those days.
What feed length tolerance should the trial run hold at 100 mm?
Within 0.2 mm total over ten feeds is a reasonable commissioning target, with the twenty-part spread at full speed inside 0.15 mm for a standard line.
Does commissioning time change if the die is not ready?
Yes, and it usually doubles the elapsed schedule. Steps one to five and seven can be completed, but pilot release timing and the capability trial have to wait for the die.
Where to go next
This article sits in the feed accuracy branch of the coil line guide library, one layer below the error budget pillar. It covers the sequence that creates accuracy at startup rather than the budget that predicts it.
Read the coil line error budget guide