One of the main reasons the STIGA autonomous robot mower can work in as little as 2 mowing cycles a day is related to lawn health... and also to your time on the lawn!
By scheduling the 2 daily cutting sessions in two specific time frames, the lawn will have the time to recover and stand up again.
The autonomous robot mowers leave a minimum of 5 hours between mows.
By doing that, the grass has plenty of time to seal in the moisture and heal from the 'injury' of cut, before the next mow. Then, with just 2 mowing cycles a day the autonomous robot mower leaves more than enough time between the mows for the grass blades to properly recover, stand up proud again, and continue to grow healthy.