Grinding device
AssigneeDeere & Company
InventorHelmut Wolf
Life of this patent
Estimating the term…
Abstract
An automatic grinding device for sharpening the knives of a forage harvester chopper drum includes a controller including a counter for counting the number of times the grindstone is adjusted toward the chopper drum during sharpening operation. The controller includes a microprocessor having a non-volatile memory in which may be stored a threshold value, determined by the type of grindstone, to which the count of the counter may be compared for generating a signal indicating the degree of wear of the grindstone so that it may be replaced when worn out.
Claims9
In a grinding arrangement including a grindstone for sharpening a knife, a device for adjusting the grindstone toward the knife, and a control unit, the improvement comprising:
- said control unit including a counter registering a count that is changed in accordance with a number of adjustment processes that have been carried out;
- said control unit including a stored, preselected threshold value;
- and said count of the counter being compared to said threshold value in order to generate a signal value.
Dependencies are inferred from the claim text.