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General Baler Questions

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Jim H.

07-21-2000 09:36:57




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Hello Esteemed Experts:
Questions: Why are square balers designed such that the needles interfere with the plunger? Why isn't the whole knotter/needle assembly just moved farther down the bale chamber? What's the system that keeps them from hitting each other (how does the knotter assembly "know" where the plunger is)?
Thanks in advance.




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duke

07-21-2000 22:14:17




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 Re: General Baler Questions in reply to Jim H., 07-21-2000 09:36:57  
There is a plunger stop that is supposed to raise up into the chamber any time the needles are out of the home position. If the plunger hits the stop it shears the pin on the baler drive, Shear pins are lots cheaper than needles or as i have seen needles, knotter frames, needle frames and tucker finger all turned to scrap iron.



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Dan from PA

07-21-2000 19:48:49




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 Re: General Baler Questions in reply to Jim H., 07-21-2000 09:36:57  
I would say a few factors that make it necessary for the needles and plunger to be so close are:
1) The further you go down the bale chamber, the tighter the hay is packed. So in order to have needles that can penetrate the tightly packed hay would require a much beefier drive mechanism.
2) My baler (with kicker) is pretty long already, and the hitch for the wagon is also quite long. The extra length would cause terrain clearance problems, and the length of that wagon hitch already makes me nervous turning downhill.
3) However will the manufacturer be able to sell new needles for an arm and leg? :)

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Burrhead

07-21-2000 15:28:31




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 Re: General Baler Questions in reply to Jim H., 07-21-2000 09:36:57  
The needles don't interfere with the plunger if the baler is in time on the mechanisms. The only time the needles are hit by the plunger is when the bale mechanism has jumped time or a drive chain broken.

No matter where the needles could be located, they would still have to operate the same as they do where they are now due to the tie has to occur while the plunger has the grass in a compression stroke, then the plunger moves back releasing the grass and the strings bind the bale.

The baler is timed by the chains and cogs in the drive system. Kinda like an engine piston knows where the vales are in their cycle.

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