ASDA Series Application Note Chapter 4 Application Techniques
March, 2015 4-9
4.2.3 Servo System Configuration
4.2.3.1 The Conversion of Command and Compensation from Servo Drive
E-Cam system of ASDA-A2 can adjust the command resolution of the host controller and keep it
consistent with the moving distance of the mechanism. If tolerance of pitch exists, the system is
able to adjust the E-Cam curve according to the actual moving distance of the lead screw,
making every pulse correspond to the same amount of moving distance and eliminating the
impact brought from different tolerances. In this setting, values from command of the host
controller, E-Cam command from the servo drive have to correspond to each other, and actual
moving distance of the mechanism. See Figure 4.2.3.
Host
Controller
1
Command from the
host controller
2
E-Cam command
from the Servo drive
3
distance of the
mechanism
Figure 4.2.3 The Correlation of Command of Host Controller, E-Cam Curve, and Machine Moving Distance
If a host controller which pulse command resolution is 0.1 mm/pulse and the required moving
distance of mechanism is 20 mm, the required pulse number will be 20 mm / 0.1 mm = 200 pulse.
If there is no tolerance on lead screw and the servo does not modify the command, the
correlation is 1 pulse 1 PUU 0.1 mm. (See Figure 4.2.4) PUU is the unit of command from
Delta’s servo drive.
To Next Page
Loading...
Need help?
General
