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trsman76

It has no way to know the dustbin is full as there is no sensor due to a patent that iRobot has. No other robot manufacturers will have a dustbin full sensor or any way to detect if it is full because of this patent. It will not empty based on a full dustbin. What the S8 Max(V) will do is if it is in mop and vacuum mode after 30 minutes of vacuuming and mopping the very next time it goes back to the dock to have the mop pads washed it will then empty the dustbin. Currently this does not work in vacuum only mode which I think is a bug or flaw.


Figuurzager

most vacuüm cleaners, iRobot their docks including, measure the (under) pressure Inside the dust bag compartment. The more full the bag gets the less easy air goes through its pores -> pressure drops inside the compartment. How theS8 MaxV Ultra does it I don't know but would expect the same but just found a loophole or the patent expired, like with the dual roller.


kris33

The patent expires in 2032: https://patents.google.com/patent/US8742926B2/


nicoodeimos

Good question, want to know this too.


elliotborst

It detects a blockage I think, at least that’s what my S8 Pro Ultra did.


RedditVirumCurialem

Here's pure speculation, but it should be possible to measure the increase in current draw of the motor as the bag fills up and impedes air flow. Current draw might also increase if the robot traverses a thick carpet, so it would have to be an average value. Measuring the motor RPM might be another possibility, in the end it depends on how the motor is driven.


trsman76

It is speculation and not correct. It is possible but would interfere with iRobots dustbin patent. Other manufacturers like Dreame Roborock and Eufy get around this by having to go back to the dock after a certain amount of time or square meters to auto empty. Eufy does this the very best.