Adjustment Of Axial Direction And Pulse Equivalent; Axial Direction Adjustment; Pulse Equivalent Adjustment - WEIHONG NK280 Manufacturer's Manual

3.2

Adjustment of Axial Direction and Pulse Equivalent

3.2.1

Axial Direction Adjustment

Firstly confirm the positive direction of each axis in terms of right-hand rule during the process of
machine debugging. The coordinate system of the right-hand rule is shown in Fig. 3-2.
The axial directions of machine are decided by both the type of machine tool and the layout of each
component. The basic coordinate axes of engraving machine/ router are X-, Y-, and Z-axis:
——Z-axis is coincidental with spindle axis and the direction of cutter moving away from workpiece
is the positive direction of Z-axis (+Z).
——X-axis is perpendicular to Z-axis and parallel to the clamped surface of workpiece. For the
single column vertical milling machine, if users face the spindle and look in the column direction, right
moving direction is the positive direction of X-axis (+X).
——The positive direction of Y-axis (+Y) is the direction cutter moves away from the operator.
 Related Parameters
Parameter Name
X-axis Output Direction
Y-axis Output Direction
Z-axis Output Direction
A-axis Output Direction
3.2.2

Pulse Equivalent Adjustment

Pulse equivalent (p): the moving distance of workbench or rotation degree of rotary axis
corresponding to one pulse sent by CNC device, the minimum available distance controlled by CNC
system as well.
The smaller the pulse equivalent is, the higher the machining precision and surface quality will be.
The larger, the faster feedrate will be. Therefore, lower pulse equivalent should be set under the
condition of meeting the demand of feedrate. The relationship between Max. feedrate and pulse
equivalent is as following:
Max. Feedrate= pulse equivalent X 60 X frequency
For example, the hardware frequency of NK280 is 320 KHz and provided the pulse equivalent is
0.001 mm/p, then:
Max. feedrate=0.001 X 60 X 320000= 19.2m/min
Mechanical deceleration (m/n): the ratio of reducer input speed to output speed, equal to the ratio of
- 30 -
+Y
+X
+C
+Z
+Z
Fig. 3-2 The coordinate system of the right hand principle
Definition
It specifies the motion direction of
each axis.
Weihong Electronic Technology Co., Ltd.
+Y
+Z
+B
+X
+A
+Y
+X
上海维宏电子科技股份有限公司
+X+Y+Z
+A+B
+C
Setting Range
―1‖, ―-1‖ represents the two
motion directions of each axis,
1 for positive direction and -1
for negative direction.
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