The other week I wrote about the John Deere 7760 and how it has changed cotton picking in Australia, while I mentioned some of its features and its advantages I didn’t mention how it worked. While the 7760 is large machine with many moving parts how it works is pretty simple at a basic level, lets start by looking at some of the main parts.
I believe that their are four main parts that are essential to the piking process; they are the heads, suction (chutes and fan), the basket and the round baler. All of these parts need to work together in order to take the cotton off the plant and build it into a durable round bale (sometimes called eggs) that can be transported to the gin for processing into bales.
The process for making a round bale starts in the heads where the spindles rip the cotton from the plants as they pass though the heads, the spindles are like of long metal fingers that stick out horizontally and sit on top of one another. While the picker is working they spin at high speeds inside the heads removing the cotton from the plant and delivering it to the back of the heads where they are sucked up by the chutes. The chutes use airflow created by a large fan to suck the cotton from the back of heads and into the basket, while the cotton goes through the chutes it will pass the “Cotton Mass Flow Sensor” that detects the amount of cotton flowing through the picker and will use it help make a yield map of the crop.
Once through the chutes the cotton will accumulate in the basket until it is full, then once the basket is full a alarm will sound in the cab and the operator will use their foot to press a button on the floor of the cab, this starts the belts that feed the cotton from the basket and into the round baler where it starts to form a egg. After repeating this process a few of times a full egg is formed and ready to wrapped. The wrapping process starts with a specially designed non-stick section of the wrapping plastic being fed through rollers to make the initial wrap, this prevents the cotton becoming stuck to the plastic. After the non stick plastic section has made the first wrap a second wrap is made with a sticky section to hold it all together before a third wrap is made with another non stick section to cover the outside. The picker can hold four roles of wrap in storage while using one working wrap, they are easy to load and can be done with only the push of the button.
A couple of other interesting features about the 7760 is that unlike most other farm machinery it’s auto-steer doesn’t run off GPS, instead sensors in the heads detect to the rows of the cotton plant and follow them instead. How ever it still will use GPS to detect where it is in the field and will create a yield map of the field with the data collect from the “Cotton Mass Flow Sensor”.
I hope this helps to explain how the John Deere 7760 actually works to pick the cotton and create a egg, as always if you have any questions or want to leave a comment feel free to do so below. Also be sure to check out some of the new photos on Farming Photo’s including one which recently won a prize at the Moree Show, and make sure you also check out this weeks Cotton Career.