My robot shows an error on the left wheel

[Holy Hathaway]

Hello, my Irobot 7 shows an error on the left wheel, but the wheel module works because I tested it on another I7, could you explain the full procedures to identify which mosfet is damaged and how to remove it from the board and install the new components reflux? thanks.

[HarryA]

If it works in another unit why do you think it is damaged? Perhaps the fault lies with the error sensing circuit.  A  fault that arises with vacuum cleaner power heads is that a string, etc.  gets wound around the wheel axis impeding the wheel. There are videos related to this type of problem on youtube: for example see: https://www.youtube.com/watch?v=kqq6Ezilky4

In regard to the mosfet; if there is a voltage at the gate of 3 to 4 volts or more the voltage across the mosfet should be less the supply voltage. If not that may mean the mosfet is opened - not conduction current.

If I were to build a robot I would buy one to use as a base;

https://shopgoodwill.com/categories/listing?st=robotic cleaner&sg=&c=&s=&lp=0&hp=999999&sbn=&spo=false&snpo=false&socs=false&sd=false&sca=false&caed=11%2F17%2F2021&cadb=7&scs=false&sis=false&col=1&p=1&ps=40&desc=false&ss=0&UseBuyerPrefs=true&sus=false&cln=1&catIds=&pn=&wc=false&mci=false&hmt=false

 

 

 

[Sekemiat KE]

Can you share some photos of the board so that i can try to understand what you really want.

[Norman Theroux]

Contact a specialist:)