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A-11
Appendices
Rack and Pinion
In a system with a rack and pinion, the following must be considered:
The weight or mass of the pinion
The weight or mass of the rack
The friction and/or preload between the pinion and the rack
Any friction in the guidance of the rack
The weight or mass of the object the rack is moving
Conveyor Belt
In a system with a conveyor belt, the following must be considered:
The weight and size of the cylindrical driving pulley or roller
The weight of the belt
The weight or mass and size of the idler roller or pulley on the opposite end
The angle or elevation of the belt
Any load the belt may be carrying
Weight of
pinion and shaft
Preload or friction
between pinion and rack
Load on
rack
Weight of
rack
Friction of
rack in guide
Gearbox
Motor
Weight and size
of drive roller
Weight and size
of idler roller
Weight of
conveyor belt
Weight of
parts
Friction
of belt
Elevation
Motor
Gearbox
Figure B.3: Rack and Pinion System Inertia Considerations
Figure B.4: Conveyor System Inertia Considerations