Original Operating Instructions
Construction and function
Version 1.0.3
Cylinder Cam Rotary Indexing Table RT and TT
Page 21
4.5
Operating modes
The Cylinder Cam Rotary Indexing Table Type RT and TT has the following operating modes:
Normal operation
o
Intermittent operation
o
Continuous operation
o
Reversing operation (Oscilating operation)
Inching mode
Emergency-Stop
NOTE
Do not operate in inching mode without an appropriate rotary table controller.
4.5.1
Normal operation
Normal operation is regarded as the movement of the drive flange in a direction from one dwell
position to the next. The rotational direction of the drive flange is determined by the rotational
direction of the drive. With a three-phase motor this can easily be reversed by swapping two
phases of the supply voltage.
4.5.2
Intermittent operation
The drive shaft stops in the dwell phase. The step time is fixed. The dwell period is variable.
This mode of operation is used in plants with much longer processing times than times and is
the most common mode of operation.
4.5.3
Continuous operation
The rotary table runs continuously without the motor stopping. Step and dwell times are fixed
and are run through continuously. The drive motor has only one rotational direction. This mode
of operation is frequently used in fast-running plants with short processing times. The rotary
indexing table is mechanically synchronized to the rest of the plant by the free drive shaft. The
ratio of dwell to step time can be adjusted within certain limits by TAKTOMAT when producing
the cam.
4.5.4
Reversing operation (reciprocating operation)
The drive of the rotary indexing table is always reversed in the dwell phase. In this mode of
operation, the drive flange shuttles back and forth between two positions. With rotation angles
of less than 90° on the drive flange, the cam can be constructed in such a way that continuous
reversing operation is possible without the direction of the drive being reversed.
4.5.5
Inching mode
In inching operation, the drive flange moves in small increments between two dwell positions.
The cylinder cam cannot gently accelerate and decelerate the accumulated load. This puts the
hardware under stress, since any acceleration that occurs during the inching operation exceeds
that of normal operation many times over. No inching operation is permitted if there are no suit-
able rotary indexing table controls that allow gentle acceleration and braking of the load outside
the dwell phase.
4.5.6
Emergency-Stop
Emergency stop is comparable with the stopping in inching operation. Here, too, the stopping
and re-starting of the accumulated load occurs outside the dwell phase. Frequent emergency-
stop situations should be avoided or should take place by using the rotary indexing table control
TIC in such a way that there is no danger to the mechanism.
