Changeover Adjustment
Use this guide after a die or material change to bring the feeder back to a controlled starting condition. It separates physical adjustment from commissioning and final acceptance, so operators do not try to solve every problem by changing one setting.
- AdjustmentChanges the physical or recipe starting state.
- CommissioningProves the line works in staged operating modes.
- AcceptanceCompares measured evidence with approved criteria.
- Stop conditionUnknown model, document, authority or safe state.
Freeze the job before changing an adjustment
Record the feeder model or project identity, press, die, material specification, width, thickness, feed direction, target pitch, passline reference, release or pilot requirement and last accepted setup. The machine manual, project drawing and approved setup sheet control the actual adjustment points and limits.
| Record group | Minimum useful information | Do not assume |
|---|---|---|
| Machine | Feeder, press, die and installed release method | Two similar-looking feeders use the same mechanism. |
| Material | Grade or specification, width, thickness and surface sensitivity | A previous pressure or guide setting transfers safely. |
| Job | Released pitch, strip layout, passline and operating condition | A remembered value is the approved value. |
| Authority | Authorized person, safe-work method and document revision | An internet procedure replaces the machine instructions. |
Adjust the strip path and passline first
A strip that climbs, dives or pulls sideways between support equipment, feeder and die can imitate feed-length error, slipping or misalignment. Establish the approved die entry reference, support the strip and confirm that the feeder is level and square to the intended travel path before changing grip or electronic values.
Passline height
Use the identified mounting and height-adjustment method for the exact machine. Keep the feeder supported, preserve parallelism and secure the mounting interface to the specified requirement before any powered trial.
Loop and support
Confirm that the upstream loop can move without pulling the feeder and that the strip is not rubbing a stand, guard, die edge or guide. A feeder should not be used to overcome continuous upstream tension.
Set guide width without steering the strip
Entry guides or stop wheels should keep the material referenced without pinching it or forcing it toward one side. Center the strip on the working roller area where required by the machine documentation, then check free movement manually or in an authorized jog condition. A guide that is too tight can create scratches, edge curl and apparent feeder skew; a guide that is too loose may allow lateral wander.
- Before adjustment: clean the contact area and identify burr direction, coil set and any surface protection requirement.
- After adjustment: confirm that both edges remain free and the strip does not bind through the intended loop movement.
Set roller gap or grip for the actual material
The objective is stable traction without permanent marks, buckling or side pull. Use the exact machine’s approved thickness, pressure, spring or cylinder procedure. Increase or decrease only in controlled increments, then inspect both the strip and the roller contact pattern.
| Observed result | Adjustment area to verify | Related diagnosis |
|---|---|---|
| Pitch shortens under load | Roller grip, contamination, upstream pull | Slipping and material retreat |
| Strip walks sideways | Guide force, passline, loop direction, unequal contact | Material skewing |
| Surface marks or distortion | Excess grip, roller condition, trapped debris | Stop and preserve the material and contact evidence. |
| Pitch is stable but wrong | Released target, recipe entry, reference and measurement method | Verify the job record before applying compensation. |
Enter feed length and job parameters from released data
Use the die progression or approved job record as the source of the target feed length. Do not calculate a new production value from one defective part. Confirm units, decimal position, recipe identity, feed count, direction and any job-specific sequence before saving a change.
For a mechanical roller feeder, feed length is set and verified by a different mechanism. Keep that long-tail procedure separate: adjusting feed length on a roller feeder.
Route timing and release work to commissioning
Feed-start, press-permissive and release or pilot behavior are not safe generic angles. Their meanings, sources and windows belong to the press, die, feeder and interface documents for the named line. After physical and recipe adjustments are complete, verify these functions during staged commissioning rather than guessing from a diagram or another machine.
CommissioningJog, single-stroke, signal and speed-ramp verification.
AcceptanceMeasured evidence, interface checks and handover.
Use a controlled handoff checklist
- Secured: mounting, guards, guide locks and identified adjustment locks are returned to the approved state.
- Recorded: changed values, reason, old value, new value, operator and job identity are retained.
- Unproven: the setup is marked ready for commissioning, not automatically accepted for production.
Frequently asked questions
Is adjustment the same as commissioning?
No. Adjustment establishes a starting configuration. Commissioning proves operation in controlled stages. Acceptance compares the resulting evidence with approved criteria.
Should the same settings be reused for a different material?
Not automatically. Confirm the named job and machine documentation, then treat material width, thickness, surface and strength as change inputs.
Can a feed error always be fixed by changing feed length?
No. Slip, side pull, release conflict, wrong job data and interface interruption can all create a feed error while the programmed length remains correct.
Need a reviewable feeder changeover?
Send the feeder model, press and die identity, material data, target pitch, current symptom and the approved setup or interface documents. HENLI can help identify which evidence is needed before a controlled trial.
