LNC-M600 Leading Numerical Controller Maintenance Manual

LNC-M600
Parameter
1072 WIDTH OF PULSE RISING
Range: 1 ~ 50
Active: Active After Reboot
Level: Machinery Builder
Default 20
value:
Unit: us
Description In PULSE COMMAND type, this parameter is to set the pulse wid, as shown in
:
the below figure. The pulse cycle can be expressed in the below formula. (linear
axis)
Pulse Upper
Period: T
1 feedrate
= × GR × Pulse/rev
T pitch
×
1
60000
, unit:ms
Example: X-axis pitch = 10mm, gear ratio is 2(deceleratin ratio, motor rotates
2 times and ball screw rotates one time). In the condition when it takes 10000
Pulses for the motor to complete a rotation, if the feedrate is set as
2000mm/min, then the pulse amount per 1ms should be:
Pulses =
2000
10
× 2 × 10000 ×
Commanding Pulse Rush Period is:
T
=
1000
67
1
60000
≈ 15us
≈ 67pulses/ms
Under this condition and the condition of maintaining pulse rush is 50% of
DURATION (High/Low Standard Position Time), the raising width shoue be set
as 7us.
If the setting value of this parameter is too big, it is possible to cause the raising
width of the pulse rush over the period in high speed motion. This will further
cause the commanding pulse rush to double with each other. At this time, motor
DRIVER will not able to do the determination correctly, which will make the
servo motor not able to rotate normally.
But, if the setting value is too small, the motor DRIVER still not able to do the
determination. So, the maximum setting value of this parameter should be
under the max motion speed (G00). Also the upper limit is the width of the
non-double commanding pulse rush rows. The smallest value should be the
smallest width value that the motor DRIVER is able to determine.
1100 JOG SPEED FOR X AXIS
LNC Technology Co., Ltd. 169