Apparatus for dispensing a substance onto a crop material at a controlled rate

In a baler for picking up crop material and forming it into bales, apparatus for dispensing a substance from a container onto said crop material at a controlled rate, said apparatus comprising:

• means for sensing the moisture content of said crop material to develop a first signal;
• control circuit means responsive to said first signal for producing a pulse width modulated signal;
• and,
• dispensing means including an electric motor responsive to said pulse width modulated signal for dispensing said substance onto the crop material at a rate determined by said pulse width modulated signal.

In a baler for picking up crop material and forming it into round bales, apparatus for dispensing a substance from a container onto said crop material at a controlled rate, said apparatus comprising:

• means for sensing the size of a bale being formed in said baler to produce a first signal;
• control circuit means responsive to said first signal for determining the rate of bale size increase and from said rate producing a control signal representing the bulk rate of crop flow into said baler;
• and,
• dispensing means responsive to said control signal for dispensing said substance onto the crop material at a rate determined by said control signal.

In a baler for picking up crop material and forming it into bales, apparatus for dispensing a substance from a container onto said crop material at a controlled rate, said apparatus comprising:

• means for sensing the bulk rate at which crop material is passing through the baler to develop a first signal;
• control circuit means responsive to said first signal for producing a pulse width modulated signal;
• and,
• dispensing means including an electric motor responsive to said pulse width modulated signal for dispensing said substance onto the crop material at a rate determined by said pulse width modulated signal.