Net Wrap Troubleshooting

General Advice To achieve the best results from your baler at the beginning of the season or when starting work with a new baler, spend time checking over the machine and setting it up correctly. A couple of hours spent at this point will save hours of lost productivity in season.

Net Wrap Tips

Problem: Net Splitting

Cause:

1. Netwrap damaged whilst in packaging,
2. Net being snagged or damaged in baler, causing laddering,
3. Insufficient net applied to the bale.

Bales being damaged by chamber rollers during bale ejection, as bale does not eject immediately. Very obvious in some fixed chamber balers, when making heavy or very dense bales. At the point of ejection, the bale remains static whilst the rollers are rotating, scuffing bale across entire width, leaving a very obvious straight-line damage on bale surface. This will, eventually, damage the net and cause it to break. Solution:

1. Unroll net wrap until identified damage has disappeared. Always handle net wrap with care whilst transporting.
2. Check net path through baler for sharp edges, rust, weld spots or paint drips on fixed bars. Check net is not being damaged on end, within the net box space. On fixed chamber roller balers, check the condition of chamber rollers for damage which could disrupt the net during application to the bale. On Variable belt balers check the condition of the belt joiners. Worn or damaged units will tear net.
3. Bales should always have a minimum of 2 turns of net per bale.
4. Reduce baler rpm. Check that baler to tractor coupling angle is correct. Try not to eject bale on “up” incline. Investigate possibility of fitting a kit to assist bale ejection.

Problem: Net wrapping around feed rollers

Cause:

1. Uneven net cutting leaving Long tails of net catching on feed rollers.
2. Feed rollers worn or damaged, catching net when running.
3. Feed rollers wet or sticky from damp or crop residue.
4. Rollers left under tension from braking mechanism, embedding net into rubber roll surface, causing net to roll onto feed rollers instead of feeding freely.
5. Netwrap feed guide behind feed rollers damp or dirty from crop residue.

Solution:

1. Adjust brake tension to give a cleaner cut on the net and look at the cutting action and ensure the knife is clean and undamaged.
2. Check feed rollers are smooth and free from anything that may interfere with the net wrap.
3. Clean rollers and apply talc (chalk) or anti-static spray.
4. Reduce tension between feed rollers when not baling.
5. Clean net feed guide plate.

Problem: Net not spreading to edge of bale

Cause:

1. Netwrap not tensioned sufficiently.
2. Uneven bale density.
3. Crop residue jammed in baler.
4. Feed rollers miss aligned

Solution:

1. Check and adjust net wrap tension in baler. More tension will help net to spread better.
2. Bales with less dense edges will cause the net to “neck down” on the bale and go to the edge.
3. Crop jammed between chamber belts and drive rollers will restrict the net from being applied evenly to the bale.
4. Check and correct feed roller alignment. Bad adjustment will lead to uneven feeding and therefore application to the bale.

Problem: Net snapping in baler

Cause:

1. Roll of net jammed tight in bale box.
2. Excessive friction on the net.

Solution:

1. Check core is not swollen and out of shape, restricting its operation in baler. Check net wrap box is not restricting roll running freely. Check there is not too much brake tension being applied to the roll.
2. Ensure baler’s fixed tension bars are clean, free from dirt and rust and that the net is threaded correctly. Incorrect installation can lead to broken net, feeding and cutting problems.

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This material is for troubleshooting purposes only. We bear no responsibility for any loss of service due to technical or operational difficulties arising from using this material. See your Bale Manufacturer for more information on your baler if needed.