CNC Setup Utility Manual
P/N 70000490C - Machine Constants
All rights reserved. Subject to change without notice.
10-December-04
2-17
Table 2-2, Machine Constants Setup
(Continued)
Machine Constant
Parameter
Function Settings
MC_2010:
X Ballscrew Pitch
Pitch is the linear distance traveled per
revolution of the X-axis ballscrew.
NOTE:
This parameter applies only to
rotary encoders. Do not use if the axis
is using a linear encoder for feedback.
Range (0.00000–30.00000)
0.47244 (inch) [Default]
MC_2011:
X Number of Teeth
Motor
Gearing on the X-axis motor side. Set
at 1 if there is no gear train.
Range (1–200000)
1 [Default]
MC_2012:
X Number of Teeth
Ballscrew
Gearing on the X-axis spindle side. Set
at 1 if there is no gear train.
Range (1–200000)
1 (no gear train) [Default]
MC_2013:
X Motor Encoder
Phase
Invert X-axis motor and encoder count
direction.
Invert
[Default]
Not invert
MC_2014:
X DC Bus Voltage
Standard X-axis value 560 (VDC). This
value can be changed is the supply
voltage deviates from the standard
voltage 3*400 (VAC).
Range (100–800)
560 (VDC) [Default]
MC_2015:
X I2t Guarding
The square of the actual current is
integrated to monitor the actual power.
The integration lasts for 10 seconds
with feed motors and 150 seconds for
main spindle motors.
For the limit value, the nominal motor
current is used, multiplied by the factor
from MC_2015. Standard value is
100%.
Range (0–800)
0 Off [Default]
MC_2016:
X Commutation Offset
Speed (rpm)
The X-axis field angle offset (MC_2017)
operates from this speed.
Range (0–40000)
0 (rev/min) [Default]
MC_2017:
X Commutation Offset
Angle (deg)
The X-axis field angle offset is
interpolated between the value zero at
MC_2016 speed and the MC_2017
value at Nmax (maximum) speed
(velocity).
Range (0–360)
0 (degrees) [Default]
MC_2018:
X Velocity Filter
The X-axis velocity filter is suitable for
damping high-frequency spurious
oscillations (>600 Hz).
0
No filter [Default]
1 1
st
order filter (spurious
oscillations less than (<)
approximately 700 Hz)
2 2
nd
order filter (spurious
oscillations greater than (>)
approximately 700 Hz)
(Continued…)
