Member Login
Search
Jump to a Date
Sponsored Communities
Cool stuff
Neat Stuff

Visit our shop for nerds in control lifestyle products.
Thermal Overload
The threads that wouldn't die...
- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
Fortune
"Might as well be frank, monsieur. It would take a miracle to get you
out of Casablanca and the Germans have outlawed miracles."
out of Casablanca and the Germans have outlawed miracles."
RSS Feed
www.control.com/rss/
To get a personalized feed, become a member at no cost.
Need help with MOOG Dual PWM Amplifier G123-814-001 controlling a Weing Moulder Speed via a Linde hydraulic pump and valve
Have just upgraded a Allen-Bradley Compactlogix PLC from L30 to L31 which is controlling a Weinig Moulder speed. We have an Analogue card sending a signal to a MOOG Dual PWM Amplifier G123-814-001 and this then drives a forward and reverse valve on a Linde pump. The feedback is via an 1000pulse encoder and the problem is that we can't control the speed properly, when you start the feed or change speed, the speed fluctuates for about 30-60 seconds before settling down to the required speed (ie: if speed set to 65m/m, when started it will jump to 100mpm, then go down to 20m/m then it will go to about 40-45m/m and then slowly work its way to 65m/m). Inside the program we are using a Speed PIDE to control this and have the "P" set to about 1 and the "I" set to about 12. This was done using tuning software and the figures seemed wrong to me as normally the "I" is about a tenth of "P".
Could anyone please give some advice as I have never worked with these before.
Have just upgraded a Allen-Bradley Compactlogix PLC from L30 to L31 which is controlling a Weinig Moulder speed. We have an Analogue card sending a signal to a MOOG Dual PWM Amplifier G123-814-001 and this then drives a forward and reverse valve on a Linde pump. The feedback is via an 1000pulse encoder and the problem is that we can't control the speed properly, when you start the feed or change speed, the speed fluctuates for about 30-60 seconds before settling down to the required speed (ie: if speed set to 65m/m, when started it will jump to 100mpm, then go down to 20m/m then it will go to about 40-45m/m and then slowly work its way to 65m/m). Inside the program we are using a Speed PIDE to control this and have the "P" set to about 1 and the "I" set to about 12. This was done using tuning software and the figures seemed wrong to me as normally the "I" is about a tenth of "P".
Could anyone please give some advice as I have never worked with these before.
From Control Engineering magazine...
Related articles from Control
Engineering magazine- Siemens announces motors, drives, and motion control advances
- Wurldtech Achilles cyber security testing
- OMAC guidelines ease design, programming, integration
- Webcast to examine best practices for adopting Microsoft Windows Vista
- Vision sensor inspects for defects at any part position, rotation
- Smart vision sensor features simple setup, high-speed inspection
- Cameras with DSP coprocessors offer multiple options
- GHS has EAL6+ operating system security certification; launches Integrity Global Security
Above articles copyright 2008 Reed Business Information.
Subject to its Terms of Use.
Your use of this site is subject to the terms and conditions set forth under Legal Notices and the Privacy Policy. Please read those terms and conditions carefully. Subject to the rights expressly reserved to others under Legal Notices, the content of this site and the compilation thereof is © 1999-2008 Control Technology Corporation. All rights reserved.
Our Advertisers
Help keep our servers running...
Patronize our advertisers!
Patronize our advertisers!




