Set Pulse Equivalent - WEIHONG LS1500 Manual

Follow the steps below to set speed parameters:
1. In the menu bar, click System > System Parameters.
2. In the System Parameters window, click Speed Accuracy category in the left list
to adjust corresponding parameters on the right.

3.7 Set Pulse Equivalent

During debugging, you need to adjust the pulse equivalent and electronic gear ratio before
starting to control the machine movement.
Use one of the following methods to set pulse equivalent:
 In the menu bar, click System > System Parameters to set Pulse Equivalent for
each axis.
 In the menu bar, click System > Drive Parameters to set the electronic gear ratio
numerator and denominator parameters.
For details, see the user manual of the drive brand.
Calculation methods are shown below.
Equation
The equation varies based on the type of motor axis.
 Linear axis
o Stepping motor:
Pulse equivalent = screw pitch / (360/stepping angle × subdivision ×
mechanical reduction ratio)
o Servo motor:
Electronic gear ratio = (encoder resolution × pulse equivalent) / screw pitch ×
mechanical reduction ratio
 Rotary axis
o Stepping motor:
Pulse equivalent = 360 / (360/stepping angle × subdivision × mechanical
reduction ratio)
o Servo motor:
Electronic gear ratio = (encoder resolution × pulse equivalent) / 360 ×
mechanical reduction ratio
Parameter definition
The parameter definitions vary based on the control system type.
Parameters in bus systems
 Lead screw pitch: Pitch is the distance from the crest of one thread to the next, or
the distance travelled by the lead screw rotating by one turn.
 Encoder type: Set it to the type of the axis motor encoder.
o 0: incremental encoder
o 1: absolute encoder
 Encoder digits: Set it to the digit number of the axis motor encoder.
 Electronic gear ratio: Determines how much the servo drive enlarges or shrinks
the pulse frequency received. Set it to the drive electronic gear ratio. The default
value is 1:1.
 Mechanical reduction ratio: Equals speed reducer deceleration input/speed
reducer rotational speed output, slave gear number/master gear number, or motor
axis rotation speed/lead screw rotation speed.
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