Adjustment of the knotter in big baler part2 Result of all modifications

A.Reduced driveline torque

Advantages :

•Better overal performance

•Less wear on components

•Smooth driveline = less noise when knotting

•Increased reliability

B.More consistent and longer pigtails

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•Double knotting results in twines around the bale with two knots

–One to join top and bottom twine when tie-ing off a bale (knot I)

–One to join top and bottom twine of the new bale (knot II)

•Past weakness of NH knotter was knot II which tended to have short tails which could unroll. High density and silage baling (some grass in the knots) are conditions which worsen the problem.

•NH knotters have changed (patent!) to overcome this weakness. Competitive knotters still have this weakness.

B.More consistent and longer pigtails – Summary of the test

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•NH knots do have tail lengths of around 20mm. There’s no difference between knot I & II anymore, all knots have good length knot tails.

•Competitive double knotter clearly had problems with short tails  with knot II. Several borderline tails (5mm). All nr. I knots were OK: all longer than 10mm and of approximately the same length as NH knots.

•Unfortunately one poor knot is enough to cause a bale to explode.

  NH BB9080 rotor cutter vs comparable competitive unit 

Oat straw. Spain 24/6/2008. 10.00-12.00

C.Improved serviceability

Easy and quick removing of the shielding to access the knotter.

This simplifies threading, adjusting and maintenance