What is positive and negative drives?
Positive drive means the drive without slip during transmission.for example gears.You cannot find a slip in gear unless and until in rare case if there is a breakage of gear teeth,and chain drive also have only some negligible slip. But whereas in negative drive there will be slip in transmission.
What is a negative drive?
The negative driving torque is defined as torque applied to load in the reverse direction of the motor rotation. When the servomotor driver controls the motor to drive its load with negative driving torque, the effects of the negative driving torque may damage the servomotor driver.
What is positive and non-positive drive?
A positive drive is free from slippage and thus provides constant velocity ratio. Contrary to this, a non-positive drive cannot provide fixed velocity ratio due to slippage or other similar issues. Each drive has unique advantages over the other one and thus is used in various applications.
Is chain drive a positive drive?
Chain drive is one engagement drive. It is one non-positive drive because of frequent slip and creep.
Why gear drives are positive drives?
Why are gear drives called positively driven? 1. There can be no slip between each gear ie two gears 10 teeth each will rotate together so that if you were to number the teeth and mesh the two gears with 1 adjacent on both (1 on one gear will be between teeth 1 and 10 on one of the gears).
Is V belt positive drive?
Although V-belt drive eliminates slippage, both of them are categorized under non-positive drive because of creep motion. In fact, V-belt can also slip when load on driven shaft exceeds a certain limit.
Why a gear drive is called positive drive?
The gears are used when the shafts are very close with each other. This type of drive is also called positive drive because there is no slip. If the distance is slightly larger, chain drive can be used for making it a positive drive.
Is fiber rope drive a positive drive?
The drive is positive, because the slip between the belt and the pulley groove is negligible. 3. Since the V-belts are made endless and there is no joint trouble, therefore the drive is smooth.
Is belt drive a negative drive?
In belt drive, driver and driven shafts are connected by intermediate flexible element (belt). It is a positive drive; so velocity ratio remains constant. It is non-positive drive as slip and creep occur frequently.
Why a gear drive is called a positive drive?
Is V-belt positive drive?
Is V-belt drive a positive drive?