1 Define the length error before adjusting the machine

Choose one drawing revision and one measurement method. Support long blanks consistently, use an instrument suitable for the tolerance, and agree whether burrs are included in the measurement. Record programmed length and actual length separately. A repeatable offset points toward a different investigation from a wide scatter of long and short pieces. Recheck several samples with a second measurement to rule out inconsistent inspection.

2 Check the wire coil and payoff tension

Record when the error occurs: near a full coil, after a stop, during acceleration or near the end of a coil. Observe payoff behavior from the designated safe position. Snagging, intermittent release or an unsuitable payoff setting can change the load on the feed system. Compare the same program before and after resolving a confirmed feed obstruction; do not compensate for unstable payoff by increasing roller pressure blindly.

3 Inspect straightening pressure and roller alignment

Look at straightness and surface marks as well as cut length. Excessive resistance in the straightener may disturb feeding, while insufficient correction can leave curvature that changes how a blank sits against the gauge. Stop and isolate the machine before inspecting the wire path. Follow the machine instructions for roller alignment and adjustment sequence, and retain the previous settings for comparison.

4 Check feed rollers for slip and wear

A stop-to-cut machine must coordinate feed stopping with cutting. A moving-cut system must coordinate the cutter with wire motion. Names such as flying shear and tracking shear can describe different mechanisms across suppliers. Read the fixed cut flying shear and tracking shear comparison for the process differences, then ask which event triggers the cut on your actual machine. A speed-related error is useful evidence, not proof of a particular faulty component.

6 Verify encoder measurement and compensation

Confirm whether length is measured at a drive axis or through a separate measuring wheel. Check the configured units and measuring arrangement against the manual. A loose coupling, worn contact surface or intermittent signal needs a different remedy from a stable scale error. A qualified technician should verify calibration using the manufacturer procedure. Record the original compensation value, each change and the resulting samples.

7 Separate machine error from material variation

Record grade, nominal diameter, measured diameter and coil identification. Keep the same batch while investigating one setting. A material change can alter drag, straightening response and feed contact. If a stable setup becomes inconsistent immediately after a coil change, compare the incoming wire and payoff conditions before treating the controller as the cause. Measure blanks in a consistent supported condition.

8 Run a controlled ten piece test

Collect ten consecutive pieces after the agreed startup condition. Number them in order and record length error as actual length minus target length. Calculate the mean error and the range between longest and shortest pieces. A small range with an offset suggests a different next check from a large range. Ten pieces are a diagnostic screen, not a process capability study or a complete acceptance sample.

9 Decide whether components need replacement

Replacement is justified when inspection identifies damage, unacceptable wear or a failed component check. Repeated adjustment without a stable result may also require supplier diagnosis. Preserve photographs and before-and-after measurements. Following replacement, verify length, straightness and cut condition together; a change that corrects length but damages the surface has not resolved the production requirement.

10 Send a complete fault record to the supplier

Send the machine identification, program, wire data, target tolerance, ten-piece results and the conditions that trigger the fault. Include a video taken safely from outside the working area. For a new line, browse the wire straightening machine range. The 6–12 mm tracking shear machine is a specific product reference for a configuration discussion; its suitability and acceptance tolerance must be confirmed on your material.

FAQ