In a previous video we went over all the components in the rear chassis of a 435X or 535AWD Automower and gave a bit of an explanation of how they worked. In this video we go into more detail about how the front and rear chassis of 435X and 535AWD Automowers communicate to each other and know which direction the other is heading. The 435X and 535AWD Automowers have a magnet at the bottom of the shaft that connects the rear chassis to the spine (Or bridge) of the mower which is a part of the mower's front chassis. The orientation of this shaft is locked in place in the mowers spine via keyways in the shaft, a key molded into the casting of the mower's spine, and the tapered shaft being tightened into the tapered hole in the mower's spine and secured with a flange nut. The magnet in the bottom of this shaft works with a magnetic sensor board directly underneath it inside the mower's rear chassis. Whenever the front chassis of the mower turns this causes the shaft with the magnet in it to rotate above the sensor which will tell the wheel motor control board in the rear chassis that it needs to compensate and follow along. When the rear chassis turns then the magnetic sensor board is moving under the magnet which the sensor board will relay to the wheel motor control board in the rear chassis and front chassis. It is important that the front and rear chassis work together so that the mower is able to turn properly and drive straight. This is why whenever any of the parts used within this alignment system are disassembled it is recommended that the alignment is calibrated to ensure the best tracking performance. We have seen many instances where both dealers and consumers have disassembled parts of this system to make repairs or simply clean up the mower and once reassembled and restarted the rear chassis and front chassis start fighting against each other because they are no longer properly aligned. The typical answer to solve this issue is take the mower to an authorized Automower dealer and have them connect the mower to Autocheck and calibrate the alignment. But, now that you better understand how this system works you might be able to easily solve this issue on your own with out a trip to the dealer or the use of Autocheck. When the mower's alignment is calibrated it is setting the magnetic sensors reading of what angle the magnet is at in relationship to the board at 0 degrees. If the rear chassis is not properly lined up with the front chassis and the mower is calibrated in this position then this is now 0 degrees despite the fact that it is not properly lined up with the front chassis and when the mower tries to drive straight the rear chassis will be out of line with the front chassis because it now THINKS that it is straight because it was calibrated at that position. The reason why this is important to understand is because this is why people have the issue with the rear chassis and front chassis fighting each other after these parts are disassembled and reassembled. When the alignment is calibrated the board isn't just saying "Ok there is definitely a magnet above me" and just moving on. The board senses the location of BOTH sides of the magnet because there is a difference in polarity between the 2 ends of the barrel shaped magnet. When the alignment is calibrated it knows which side the board the positive polarity of the magnet is on and which side the negative polarity is on. If you disassemble the rear chassis from the front chassis and the shaft containing the magnet gets rotated and then reassembled there is a possibility of the magnet being 180 degrees off from where it was when you disassembled the mower. Because the sensor board is reading the positive and negative polarity of the magnet it will now think that the rear chassis is rotated 180 degrees from it's original 0 point and try to compensate for that. Because the rear chassis is only able to rotate 90 degrees from center the rear chassis will continue trying to rotate around to the correct orientation based on the polarity of the magnet and THIS is why and how you end up with the rear chassis fighting the front chassis of a 435X or 535AWD Automower.
If you are looking to purchase an Automower, looking for Automower parts & accessories, or in need of tech support, please visit www.roboticmowerservices.com or send us an email at RoboticMowerServices@gmail.com
#Automower #RoboticMowerServices #435X #535AWD