What is the difference between Makeblock mBot and mBot ranger robot?

Contact Robot Coupe direct with a view to having it replaced under warranty.

https://www.robot-coupe.com/usa/en_US/contact

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Possible dry bearings, I would check with the manufacturer.

Obvious answer I'm sure, but you'll have to replace the speed controller

http://www.spareparts.usa.robot-coupe.com/index.php?idtf=419

Patent US4832502 - Agitation supporting and ... - Google

https://www.google.ch/patents/US4832502

GoogleMeans for supporting and driving agitators in commercial food mixers and the like ...Agitator means according to claim 1, wherein said drive belt has a tapered cross .... 1, 2 and 4) which is coupled to a bowl-tilt shaft 42 by a drive chain 44 and ...

Patent US4832502 - Agitation supporting and ... - Google

www.google.com/patents/US4832502 GoogleMay 23, 1989 - Agitation supporting and driving means for commercial food mixersand the like ... said agitator driving shaft, and wherein said drive belt extends between.... of the drive chain in the area adjacent the mixing bowl and agitators,

Robotic Mechanisms - PULLEYS and BELTS 51045 ...

www.robotpark.com/.../robotic-mechanisms-pulleys-and-belts-51045/

Jul 17, 2013 - A large drive pulley driving a smaller driven pulley by means of a belt or.... bikes, agricultural machinery, food mixers, washing machines, lawn mowers, etc. ...Chain Drive System: A system consisting of a chain and sprockets ...

the unit needs service, i mean oiled and greased, it rubbing metal to metal and you are going to burn up the unit

I can not see the machine if reset button broken? it can be replaced if it is a fuse-able button ,

take out the side grills, and then remove the 4 screws (torax) remove the rubber covers (4) 4 on the handle, and also remove the screws...two shell parts come apart, and voila, there is the swich...good luck

I think they are all the retaining nuts are reverse thread