Created Date: April 12,2005

Created by: stimpsonjcat

The built in HSIO on the 06 (gotta be a DC out version) can certainly handle a run to position application. 1 axis. Profiles must be programmed in ladder logic. Lower speed (7kHz I think)

The CTRIO adds many different profile types and options to the mix. Some profiles can be set up in CTRIO workbench and simply called from the ladder. Some require more code than others. higher speed at 25kHz.

Get the manual for the 06 and check out chapter 3 mode 30 code, then get the CTRIO WB software and poke around in there and check out the program examples in chapter 8 of the CTRIO manual. The differences should jump out at you.

Created Date: April 14,2005

Created by: elevmike

"I wanted to use an analog input to dial in length of cut. "

It might be more approperate to use an HMI, or some type of digital input to set the cut length. Analog inputs are designed to provide motion, level, or pressure feedback that is constantly changing, and may not provide the stability to retain exact values to keep all cuts the same length. In otherwords the cut lenght may vary with the same dial position...

Created Date: April 14,2005

Created by: EricM

Thanks stimpsonjcat. I looked over it and the built in features of th DL06 would work.

Thanks elevmike, I was thinking of putting in a potentiometer as input to the analog card and using it to enter the length into a registry. Would putting in a load pushbutton work? I was going to use an anolog output to a digital display. the load pushbutton should lock in a value.

One problem I noticed was the resolution. The table can move 24 ". The resolution is 1/4095. Would that give me an accuracy of .006 "? Do you have any suggestions for digital input that is operator friendly. Also this saw is 20 years old. An HMI might be a little over budgit and it would look like I was trying to polish a t**d.

Created Date: April 14,2005

Created by: elevmike

Eric,

By HMI I mean possably somthing small like the DV100 or better yet the EZtext. Not too expensive and MUCH better for entering cut lenth data.

Link:

http://www.automationdirect.com/adc/Shopping/Catalog/Operator_Interfaces/EZText_Panels/EZText_Units/EZ-220P

I presuem what your talking about regarding resolution (1/4095) is an encoder rated at 4095 PPR??? You need to know how many times the encoder rotates per inches of table travel. So I cant anwswer that..due to lack of info.

Created Date: April 14,2005

Created by: elevmike

Eric,

It really sounds like your new to the automation game....

Let me suggest that you very carefully study the thread on the link below before going too much further with your project.. Simmiler application. (regarding hmi and entering cut lengths etc, and use of AC drive etc..... A few hours of reading and you'll have a much better idea of what you might need to do for your projcet..

http://www.plctalk.net/qanda/showthread.php?t=11015

Regards, Mike

Created Date: April 14,2005

Created by: EricM

thanks elevmike,

I'll look at more options. The 4095 was how many increments an analog module can interpet from say 0-5v. My concerns are accuracy and repeatability. If I don't have those I'm screwed.

What was on the saw was a small european brakemotor (IEC63), 480v, 1000rpm. They aren't cheap and they are hard to find. It used hardstops with limit switches. If I had to I could use the hardstops and limit switches. I thought it would be cooler to not have the operator set the adjustable, but instead put it a cut length.

I'm new to changing values in addresses, up until know all the inputs and outputs have been discrete.

Created Date: April 15,2005

Created by: elevmike

Eric,

For a positioning system you would be better off using a digital rather then analog device for both the input (what is the position), and setpoints (target positions).

If your using a stepper to move from here to there, you have no use for anything analog. An incremental encoder connected to x0, & x1 will provide position feed back. If your applicatiion requiires position feed back of a rotating table, then an absolute encoder might be better.

Your stepper drive will take a pulse train from either the built in highspeed outputs on the PLC or and HSC option module.

The EZ text would be used to set targets, and display same and current position etc..

Please read the thread "Learning By Doing " (the link I provide above), and you'll get the general idea.

Created Date: April 15,2005

Created by: elevmike

Eric,

For a positioning system you would be better off using a digital rather then analog device for both the input (what is the position), and setpoints (target positions).

If your using a stepper to move from here to there, you have no use for anything analog. An incremental encoder connected to x0, & x1 will provide position feed back. If your applicatiion requiires position feed back of a rotating table, then an absolute encoder might be better.

Your stepper drive will take a pulse train from either the built in highspeed outputs on the PLC or and HSC option module.

The EZ text would be used to set targets, and display same and current position etc..

Please read the thread "Learning By Doing " (the link I provide above), and you'll get the general idea.

Created Date: April 15,2005

Created by: EricM

elevmike,

I looked through the ez text manual and I like that much better.

I'll use the stepper drive from AD and a NEMA34 stepper motor w/encoder from AMCI. The 900oz-in one. That should closely resemble the .4KW IEC63 motor I had on it. I measured the torque and even with a high acceleration it didn't go over 200oz-in.