Scooba 390 vs 450

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Scooba 390 vs 450

Postby Viroos » March 17th, 2014, 5:56 am

So, which one is better?
One shortcoming I paid attention in the new Scooba is the brush which is placed in the middle between the wheels, unlike the 390 model where the brush is coming up to the robot's edge, i.e. it won't clean along the walls.
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Re: Scooba 390 vs 450

Postby third_deg » March 17th, 2014, 8:23 am

450 is a very robust, and well made robot. But to make an updated scooba, they needed new compromises. So in some cases that does not mean better.

The brush is in the middle so the wheels can be in the middle like roomba (390 has them back a bit). Roomba style improves how the robot moves, but at the expense of a rotating brush that goes to the edge.

390 is also slightly smaller, so will have an easier time around chair legs, and under toe kicks. 390 has a larger tank and battery, so can clean a larger area, allowing you to refill the tank and do another run. I also think the 390 is a better pre sweeper.

The 450 is quieter, faster, moves better, will leave the floor drier, has a soft touch bumper like Roomba, and is easier to fill and drain.
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Re: Scooba 390 vs 450

Postby Viroos » March 17th, 2014, 8:42 am

Yes, I definitely like how the robot is moving, and the tank redesign too.
Does it really matter that the brush is in the middle?
How the new Scooba manages with pet hair (Of course, I'll run my Roomba before)?
What is its diameter, comparing to Roomba 650?
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Re: Scooba 390 vs 450

Postby piokrza » March 17th, 2014, 9:50 am

Scooba 450: diameter 14.4in (36.6cm) height 3.6in (9.14cm) weight 8.3lbs (3.76kg)
Roomba 650: diameter 13.39in (34cm) height 3.62in (9.19cm) weight 7.9lbs (3.58kg)

http://store.irobot.com/product/index.j ... age=family
http://store.irobot.com/product/index.j ... age=family
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Re: Scooba 390 vs 450

Postby Viroos » March 17th, 2014, 10:16 am

The brush in the middle-is it a big problem?
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Re: Scooba 390 vs 450

Postby vic7767 » March 17th, 2014, 10:24 am

There is no problem with the 450 and brush location. The squeegee still extends to the edge and cleaning is thorough.
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Re: Scooba 390 vs 450

Postby Viroos » March 17th, 2014, 10:28 am

Thanks,
if you had to choose between two Scoobas-which one would you take? :)
What are the decision making features?
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Re: Scooba 390 vs 450

Postby vic7767 » March 17th, 2014, 10:34 am

The 450 is faster, has a better designed tank as well as a better water pump. It also uses the same battery that the 500 through 800 Roombas use. Clean-up is a breeze and on a personal note, I stuck a 4400 mAH LI-ion battery in my 450 and it is working great.
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Re: Scooba 390 vs 450

Postby Viroos » March 17th, 2014, 10:36 am

By the way, can faster robot clean worse-just because it passes dirty spots faster?
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Re: Scooba 390 vs 450

Postby third_deg » March 17th, 2014, 11:17 am

the 450 puts down a layer of water to presoak the floor first while it pre-sweeps, then performs scrubbing and vacuuming cycles. This allows it to drive faster without impacting cleaning.
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Re: Scooba 390 vs 450

Postby djos » April 13th, 2014, 6:31 pm

I like the look of the brush on the 450, it looks far more aggressive and capable of scrubbing floors hard than the little brush on my 380 (which does struggle to remove stuff sometimes).
Current Robot's:
Neato BotVac 80 w/ Li-NMC Battery , 2x XV11 w/ Li-NMC Battery
iRobot Roomba 561 w/ NiMh Battery & Aerovac Bin, Scooba 380 w/ Li-NMC Battery

Previous Robots:
iRobot Roomba 562PE w/ Aerovac Bin & Sealed-bearing CHM
Evolution Mint 4200
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Re: Scooba 390 vs 450

Postby third_deg » April 13th, 2014, 10:56 pm

Bristles are much longer (less stiff) and spins at 800rpm for the 450, and 1200rpm for the 380. A lot less power is going into that scrub brush.
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Re: Scooba 390 vs 450

Postby djos » April 14th, 2014, 12:05 am

third_deg wrote:Bristles are much longer (less stiff) and spins at 800rpm for the 450, and 1200rpm for the 380. A lot less power is going into that scrub brush.


Do I have this correct:

Bristles are much longer (less stiff) and spins at 800rpm for the 450

1200rpm for the 380 but A lot less power is going into that scrub brush?
Current Robot's:
Neato BotVac 80 w/ Li-NMC Battery , 2x XV11 w/ Li-NMC Battery
iRobot Roomba 561 w/ NiMh Battery & Aerovac Bin, Scooba 380 w/ Li-NMC Battery

Previous Robots:
iRobot Roomba 562PE w/ Aerovac Bin & Sealed-bearing CHM
Evolution Mint 4200
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Re: Scooba 390 vs 450

Postby third_deg » April 14th, 2014, 11:09 am

the 450 uses less than half the power for the brush than the 380 does. The 380 has the largest motor used on any iRobot product for the brush. The motor used for the 450 is smaller than even a wheel drive motor.
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Re: Scooba 390 vs 450

Postby piokrza » April 14th, 2014, 11:25 am

wasn't 600rpm???
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Scooba 390 vs 450

Postby djos » April 14th, 2014, 6:45 pm

third_deg wrote:the 450 uses less than half the power for the brush than the 380 does. The 380 has the largest motor used on any iRobot product for the brush. The motor used for the 450 is smaller than even a wheel drive motor.


Thanks, I'll be sticking with my 380 for a long time to come then :)
Current Robot's:
Neato BotVac 80 w/ Li-NMC Battery , 2x XV11 w/ Li-NMC Battery
iRobot Roomba 561 w/ NiMh Battery & Aerovac Bin, Scooba 380 w/ Li-NMC Battery

Previous Robots:
iRobot Roomba 562PE w/ Aerovac Bin & Sealed-bearing CHM
Evolution Mint 4200
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Re: Scooba 390 vs 450

Postby mastercb » April 17th, 2014, 5:08 pm

My 450 put up no dirty water (after finishing, the dirty water tank was empty). So i investigated the issue and found the following: The bottom of the fixed part of the squeegee - lid (The one that is not at the flap holding the rotating brush) nearly covered the whole vacuum slot (which is only 1mm wide). To fix the problem, I compressed the "lid / fixed brush - unit a little bit with the fingers an now the vacuum slot is visible. Tomorrow, I will try, if this really solves the "pick up no dirty water" - problem.
Hint: On the same floor, my 390 always picks up about 200ml of dirty water.

If someone has a 450, too: Could you please check, if you can see the (complete ?) sqeegee-vacuum-slot, when you open the rotating-brush flap ?
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Re: Scooba 390 vs 450

Postby vic7767 » April 17th, 2014, 5:48 pm

mastercb Have you removed and cleaned the debris filter located behind the square black part on the upper main body ? It is held in by a single phillips head screw.
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Re: Scooba 390 vs 450

Postby mastercb » April 18th, 2014, 3:50 am

Yes, vic, the filter is clean (and the scooba is new). Can you see the small vacuum slot free, when you open your cleaning head flap?
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Re: Scooba 390 vs 450

Postby vic7767 » April 18th, 2014, 10:42 am

Not quite sure of your question but here is a picture of the open brush assembly on a 450 here.
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002.JPG
Scooba 450
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