Troubleshooting guide
Wire Feeding Problems: Causes and Corrective Actions
Troubleshoot cable tension spikes, reel overrun, loops, jerking, twist, feed slip, encoder mismatch and downstream cut-length variation.
Engineering review: 2026-08-28
When a cutter or stripper shows unstable length, the fault may begin several metres upstream. The useful diagnostic boundary is not the machine cabinet; it is the complete path from reel inertia to the downstream measuring rollers.
Symptom and cause map
| Symptom | Possible sources | First observation |
|---|---|---|
| Tension spike at startup | Heavy reel, tight brake, small accumulation, aggressive demand | Reel motion and loop position at acceleration |
| Reel overrun after stop | Low braking, delayed feedback, excess speed command | Reel coast time after downstream stop |
| Repeating loops or tangles | Poor winding, guide misalignment, overfeeding | Cable path and flange clearance |
| Jerking or hunting | Controller gain, sticky dancer, intermittent drag | Feedback signal and dancer movement |
| Cable twist | Reel orientation, side pull, incorrect payoff direction | Printed lay line or conductor orientation |
| Feed slip or marks | Excess tension, dirty/worn rollers, wrong pressure | Roller contact and material surface |
| Downstream length drift | Tension variation, slip, encoder or compensation | Measured length versus reel fill and cycle phase |
Isolate the line in order
- Record full and near-empty reel behavior, reel dimensions and material lot.
- Inspect flange damage, winding quality, shaft alignment and bearing drag.
- Run the payoff or prefeeder independently and observe braking and feedback.
- Mark the cable before and after the accumulator to identify slip or stretch.
- Run the downstream machine from a low-drag controlled supply.
- Restore integration and test repeated short-length start-stop cycles.
- Verify emergency-stop recovery, material runout and alarm exchange.
Match correction to system scale. The WM-9105C tension-free coaxial prefeeder protects sensitive coax within its published range. The WM-9334 powered dereeler addresses reels up to its published 250 kg capacity, while the WM-9150 variable-speed pay-off serves a different reel and speed envelope.
The feeding path directly affects coaxial cable assembly and power-cord manufacturing. Use the case library for published evidence, or send a video of the fault, reel drawing, cable sample and line cycle data for diagnosis.
Questions engineers ask
How can reel drag cause cut-length variation?
Changing drag alters tension at the downstream feed rollers. Sensitive insulation can stretch, rollers can slip, and rapid starts can consume material faster than the reel accelerates, producing inconsistent measured feed.
What causes a pay-off reel to overrun?
Excess stored rotational energy, delayed braking, incorrect dancer or loop feedback, a speed command mismatch and abrupt downstream stops can all let the reel continue after demand ends.
How should a feeding problem be isolated?
Separate the reel, prefeeder and processing machine. Mark and measure material at each boundary, record tension or loop position through start-stop cycles, and change only one control or mechanical variable at a time.