上海维宏电子科技股份有限公司
Weihong Electronic Technology Co., Ltd.
- 56 - Specialized, Concentrated, Focused
Parameter
Definition
Setting Range
Parameter confirmation method: set a lower value at first, and repeatedly make the machine
execute typical motion & multi-axis synchronization motion, gradually increase this value until fix the
max. startup speed. The actual setting value of this parameter is half of the max. startup speed, with
general setting range ―300 ~ 400‖.
Reasonable selection of this parameter will improve the machining efficiency, and avoid the low
speed segment with bad motion feature of motor. ―Startup frequency‖ is generally included in the
motor ex-factory parameters, but after installation, its value will vary especially in loading motion,
thus, it should be set based on the actual measurement of motor power and inertia of machine tool.
Related Parameters of Acceleration
Parameter
Definition
Setting Range
Single Axis Acc
The max. acceleration of each axis in
machining.
0.001~100000 (mm/s
2
)
Single axis acceleration includes
―Axis Acceleration‖ and ―Dry Run Acceleration‖, used to describe
the acceleration/ decel
eration capability of each feed axis, with unit ―mm/s
2
‖, depending on the
physical feature of machine, such as the quality of motion part, torque, cutting load and resistance
of the feed motor. The larger the value of the parameter is, the less time the machine will spend in
acceleration/ deceleration during motion process, the higher the efficiency is. Generally, for servo
motor system, it should be within ―600 ~ 3500‖. Set a smaller value at first, and then repeatedly
execute typical motion for a period of time. If there is no abnormal situation, gradually increase the
value. If abnormal condition occurs, reduce the value, with ―50% ~ 100%‖ insurance allowance.
Related Parameters of Reference Circle, Circular Speed Limit
Parameter
Definition
Setting Range
Reference
Circle
Speed
The max. velocity when machining a circle
10mm in diameter.
5~99999(mm/min)
After installation of machine, users can make the machine process an arc, in which vibration will
occur due to centrifugal force. The higher the speed is, the stronger the vibration will be. Gradually
increase the feed speed to see the state of vibration of machine tool until the max. circular speed is
achieved, i.e. the max. allowable speed of machine tool without strong vibration. This arc is
regarded as the reference circle, and its max. allowable speed is the max. speed of reference circle.
Max. centripetal acceleration ―a‖ can be calculated in terms of the reference circle radius and its
max speed. The formula is as follows: V
0
and R
0
are the speed and radius of reference circle
respectively, while V
x
and R
x
are the speed and radius of the arc to be processed. After R
x
is
confirmed, when the arc processing speed is larger than V
x
calculated, the system will limit the arc
processing speed automatically to ensure it is within the debugging value, i.e. the vibration will not
be stronger than that during ex-factory debugging.
2
0
x
x
V
V
a
R
R
2
0
Related Parameters of Interpolation Algorithm
Parameter
Definition
Setting Range
Whether to use type S
algorithm
Whether to enable the type S algorithm or not
in interpolation.
Yes: enable;
No: not enable
Currently, the system supports velocity triangle algorithm and velocity S-type algorithm. When
S-type algorithm is adopted, the system max. acceleration will reach the twice of the single axis
acceleration set in the system. At this time, setting a s
maller value for parameter ―Single Axis Acc‖ is
recommended.
