Delta DVP-15MC Series - Page 435

Chapter 9 Introduction of Axis Parameters
9-3
9_
Serial No Parameter Name Function Data Type
Default
Value
4
Modulo
The cycle used for equally dividing the
actual position of the terminal actuator.
LREAL 360
5
Software Limitation
Enables software limitation;
If the item is not selected, the maximum/
minimum position of the axis which
software limits is invalid.
If the item is selected, the maximum/
minimum position of the axis limited by
software is valid.
BOOL 0
6
Maximum Position
The maximum position of the axis limited
by software
LREAL -
7
Minimum Position
The minimum position of the axis limited
by software
LREAL -
8
Maximum
Resolution
Maximum resolution for the number of
servo pulses
UDINT 1280000
9
Unit Numerator
To set the number of pulses needed when
the motor runs one rotation by adjusting
the parameter and Unit Denominator.
UINT 128
10
Unit Denominator
To set the number of pulses needed when
the motor runs one rotation by adjusting
Unit Numerator and the parameter.
UINT 1
11 Pulses/rotation
How many pulses are needed when the
servo motor runs one rotation.
UINT 10000
Unit Numerator and Unit Denominator jointly set the electronic gear ratio of the servo drive. The
electronic gear ratio is used to set how many pulses the servo drive receives for one rotation that the
servo motor runs.
The resolution of the servo motor is 1,280,000 pulses/rotation. Suppose the value of parameter 11
(Pulses/rotation) is N. So N*(Unit Numerator / Unit Denominator) = 1,280,000.
12 InputRotation
This parameter and OutputRotation
decide the mechanical gear ratio.
UINT 1
13 OutputRotation
InputRotation and this parameter decide
the mechanical gear ratio.
UINT 1
14 UnitsPerRotation
The number of units which the terminal
actuator moves while output end of the
gear rotates for one circle.
UINT 10000
As illustrated below, InputRotation =1, OutputRotation =2, it means the input mechanism of gear box
rotates for one circle and the output mechanism of gear box rotates for 2 circles. UnitsPerRotation
represents the corresponding position (units) that ball screw moves while the output mechanism of gear
box rotates for one circle.
E.g. If output mechanism of gear rotates for one circle and ball screw moves 1mm and
UnitsPerRotation is set to 1, through the relative position motion instruction the ball screw will move 1
unit, i.e. the ball screw will move 1mm;
If UnitsPerRotation is set to 1000, the ball screw will move 1 unit through the MC_MoveRelative motion
instruction, i.e. 1/1000mm actually. The unit of the position in the motion control instruction, G codes and
electronic cam is Unit.