Xinje DS5E Series User Manual

48
Set the actual length per command pulse for precise positioning. For example: the object moves 1um
per command pulse. The command pulses of load rotating one circle = 6mm / 1um = 6000. In the case
of deceleration ratio is 1:1, set pulse per rotation P0-11=6000, P0-12=0. Then if the PLC outputs 6000
pulses, the object will move 6mm.
Encoder: 131072（17-bit） ball screw pitch: 6mm
Not use electronic gear ratio Use electronic gear
1. Calculation of Pulse Number per Rotation and Electronic Gear Ratio
Calculate the electronic gear ratio or pulse numbers per rotation using the following steps:
Steps
Content
Description
1
Confirm the machine
specification
Confirm the deceleration ratio, ball screw distance, pulley
diameter
2
Confirm the encoder pulse
Confirm the servo motor encoder accuracy
3
Set the command unit
Set the actual distance or angle corresponding to 1 pulse of
the controller
4
Calculate the command pulses
the load shaft rotates 1 circle
Calculate the command pulses per rotation f based on the
command unit
5
Calculate the pulses per
rotation (P0-11/P0-12)
For example, the mechanical reduction ratio of motor shaft
and load shaft is m/n (servo motor run m circles while load
shaft run n circles), P0-11/P0-12=(f×m)/n
6
Calculate the electronic gear
For example, the mechanical reduction ratio of motor shaft
Max speed
1200rpm
Two circle radius ratio: 2:1
Big circle run one rotation
(need 10000 pulses), small
circle run two rotations.
Without changing the ratio of the
electronic gear to the motor, the
rotating cycle is 131072 pulses (P
0-11=0, P 0-12=0).
If the workpiece is moved 6 mm in
one turn, the number of pulses
needed is 131072. If the workpiece is
moved 10 mm, it will need
10/6*131072=218453.333 pulses.
When the decimal number is omitted,
the error will occur.
By changing the electronic gear ratio,
the motor needs 6000 pulses to rotate
one circle.
If the workpiece moves 6 mm in one
turn, the number of pulses needed is 6
000. If the workpiece is moved 10 mm,
it needs 10/6*6000 = 10000 pulses.
When the pulse is sent, the decimal
number will not be produced and the
error will not be produced.

Xinje DS5E Series Specifications

General

Brand	Xinje
Model	DS5E Series
Category	Servo Drives
Language	English