Manual, F/T Sensor, Ethernet Axia
Document #9620-05-C-Ethernet Axia-02
Pinnacle Park • 1031 Goodworth Drive • Apex, NC 27539 • Tel:+1 919.772.0115 • Fax:+1 919.772.8259 •
C-92
13.6
Reducing Noise
13.6.1 Mechanical Vibration
In many cases, perceived noise is actually a real fluctuation of force and/or torque, caused by
vibrations in the tooling or the robot arm. The Axia sensor offers digital low-pass filters that can
dampen frequencies above a certain threshold. If digital low-pass filters are insufficient, a digital
filter may be added to the application software.
13.6.2 Electrical Interference
To reduce the effects of electrical noise on the sensor, do the following:
•
If interference by motors or other noise-generating equipment is observed, check the sensor’s
ground connections.
•
If sufficient grounding is not possible or does not reduce noise, consider using the sensor’s
digital low-pass filters.
•
Verify the power supply is Class 1 which has an earth ground connection.
13.7
Improving Ethernet Throughput
In an optimum network setup, the sensor’s RDT data arrives at the host computer with no loss of data. If
data samples are lost, consider the following:
13.7.1
Direct Connection between Axia Ethernet and Host
To achieve the best Ethernet performance (and avoid the loss of data packages), connect the sensor
directly to the host computer. If using a switch, then try to use only one switch between sensor
system and host. Avoid going through several switches or going through a hub.
13.7.2
Choice of Operating System
The Windows
®
operating system periodically performs housekeeping processes that can require a
significant amount of processing power over a short amount of time. During these intervals, a loss
of data can occur because Windows does not treat UDP data with a high enough priority. If a loss of
data is not acceptable for the application, then use a real-time operating system.
13.7.3
Increasing Operating System Performance
The following items may also help increase the performance of a computer system so that it can
best respond to the Ethernet Axia’s fast data rates:
•
Disable software firewall.
One way to improve the Ethernet performance is to not have any
software firewall activated. In some cases, this may require help from IT personnel.
•
Disable file and printer sharing
. File and printer sharing can slow down an operating system’s
response to Ethernet data and may lead to lost data.
•
Disable unnecessary network services.
Unnecessary network services and protocols can slow
down an operating system’s response to Ethernet data and may lead to lost data.
•
Use an Ethernet traffic snooper.
An Ethernet traffic snooper can detect that there are processes
using up Ethernet bandwidth and potentially slowing down the response of a computer’s
operating system. This is an advanced technique that your IT department may need to perform.
The free software program Wireshark (
) is commonly used for this type
of investigation.
•
Use a dedicated computer
. A dedicated measurement computer isolated from the company
network is not burdened by the company network processes.
