A knotter requires some fairly precise machining, gear cutting and the making of some odd shaped pieces which have some more precise machining on them. Do try to find someone square baling next spring and observe the baler in operation.
However, don't despair. Minature balers have been made, perhaps some with knotters. Generally small balers are made like the old stationary balers which were pulled by horses or tractors to piles of hay. Hay was forked by hand into the top of the bale chamber. The baler had a packer arm which came down and pushed the hay forcefully toward the bottom of the bale chamber. A plunger attached to a crankshaft forced the hay back into the bale case which had a hinged top which was tightened against springs. There was a device at the top of the bale case which held a wooden form which was dumped into the bale case. When hay was pushed back the desired length of the bale, another wooden form was inserted at the front again. After a little more hay was fed in, the bale was tied. The wooden form had 2 slots. Wire was inserted into the slots on one side of the baler, pulled through on the other side, and inserted into the slots on the other end of the bale. Then the wire was pulled tight as possible by hand and tied by inserting one end of the wire into a premade loop and twisting the end back on itself. I've seen minature balers made on this design which is a lot simpler than making a knotter. If someone has made one with an automatic knotter I don't remember seeing it.
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Today's Featured Article - Tractor Hydraulics - The Basics - by Curtis Von Fange. Hydraulics was one of the greatest inventions for helping man compound the work he can do. It’s amazing how a little floor jack can lift tons and tons of weight with just the flick of a handle. What’s even more amazing is that all the principals of hydraulic theory can be wrapped up in such a small package. This same package applies to any hydraulic system from the largest bulldozer to the oldest and smallest tractor. This short series will take a look at the basic layout of a simple hydraul
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