Delta Electronics DVP15MC11T Operation Manual page 288

Serial No Parameter Name
4
Modulo
5 Software Limitation
6
Maximum Position
7
Minimum Position
Maximum
8
Resolution
9
Unit Numerator
10
Unit Denominator
11 Pulses/rotation
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
13 OutputRotation
14 UnitsPerRotation
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.
Function
The cycle used for equally dividing the
actual position of the terminal actuator.
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.
The maximum position of the axis limited
by software
The minimum position of the axis limited
by software
Maximum resolution for the number of
servo pulses
To set the number of pulses needed when
the motor runs one rotation by adjusting
the parameter and Unit Denominator.
To set the number of pulses needed when
the motor runs one rotation by adjusting
Unit Numerator and the parameter.
How many pulses are needed when the
servo motor runs one rotation.
This parameter and OutputRotation
decide the mechanical gear ratio.
InputRotation and this parameter decide
the mechanical gear ratio.
The number of units which the terminal
actuator moves while output end of the
gear rotates for one circle.
Chapter 9 Introduction of Axis Parameters
Data Type
LREAL
BOOL
LREAL
LREAL
UDINT
UINT
UINT
UINT
UINT
UINT
UINT
Default
Value
360
0
-
-
1280000
128
1
10000
1
1
10000
9_
9-3