Effects of Side Load Chains of a Combine Harvester on Unbalanced Dynamic Vibrations of Its Threshing Drum

Table 6

Unbalanced amount before and after the test.

	30 degrees		270 degrees
	Amplitude (mm/s)	Phase (°)	Amplitude (mm/s)	Phase (°)
Before balancing
Hole 1	1.587	286	1.264	148
Hole 2	1.487	283	0.943	150
Prediction
Holes 1, 2	1.24	270	1.4	120
Error
Hole 1	21.87%	5.6%	9.7%	18.9%
Hole 2	16.6%	4.6%	32.64%	20%
After balancing
Hole 1	0.731	329	0.59	157
Hole 2	0.682	335	0.453	152