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Chapter 3 Cam Function; Control Details For Cam Function - Mitsubishi Electric RD77MS2 User Manual

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3
CAM FUNCTION
The details on cam data and operation for cam function in output axis (cam axis) are explained in this chapter.
The cam function controls output axis by creating cam data that corresponds to the operation.
The functions to operate cam data include "Cam data operation function", "Cam auto-generation function", and "Cam position
calculation function".
Refer to the following for the setting of the output axis.
Page 61 SYNCHRONOUS CONTROL
Refer to the following for the cam position calculation function.
Page 120 Cam Position Calculation Function
3.1

Control Details for Cam Function

The output axis for synchronous control is operated with a cam.
The following operations can be performed with cam functions.
• Two-way operation: Reciprocating operation with a constant cam strokes range.
• Feed operation: Cam reference position is updated every cycle.
• Linear operation: Linear operation (cam No.0) in the cycle as the stroke ratio is 100%.
The output axis is controlled by a value (feed current value), which is converted from the input value (cam axis current value
per cycle) by cam data.
Two-way operation
Cam data
(User created cam)
Feed operation
Cam data
(User created cam)
Linear operation
Cam data
Feed current value
(Linear cam: Cam No.0)
3 CAM FUNCTION
3.1 Control Details for Cam Function
Cam axis current
value per cycle
Cam
conversion
processing
Feed current value
Cam axis current
value per cycle
Cam
conversion
processing
Cam reference
Feed current value
position
(At 1st cycle)
Cam axis current
value per cycle
Cam
conversion
processing
Cam reference
position
(At 1st cycle)
Cam reference
Cam reference
position
position
(At 3rd cycle)
(At 2nd cycle)
Cam reference
Cam reference
position
position
(At 3rd cycle)
(At 2nd cycle)
Stroke amount × 100%
t
t
t
t
t
t

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