Question

[xavierdemoura]

Guys,

I do an software in PLC of an vertical center that has an FANUC 18IMB. These software do the torque control of an tool. To activate i use M400 and to deactivate i use M401. Before an G01 in the program i use another M code to specify the torque that i need control, for example, 4% of the loading spindle motor, so i program M304. When the tool is machining, the tool use 2% of loading. With the time, the tool will be consume, and the torque will increase. When the torque that the tool need to machining for equal the torque that i use (M304), the machine will stop all axis and turn off the spindle. I do these to prevent an broken tool, or to said to the operator to change the tool. So, these is the infomations to these software works. I would like to know if these is usual to work, or in these way, if it´s very complicated to work. I need informations or what you think about.
Thanks for attention. If any one wnats that, it´s possible i send by e-mail.

Daniel

[psevin]

Daniel,

As you're aware, we've sold and installed a variety of tool monitoring & adaptive control systems over the years. If I understand you correctly, what you have designed sounds like a very easy solution to use in the program.

The one thing I would like you to clarify is the limit setting method. In your example you said, "4% of the loading spindle motor, so i program M304". Does this mean that 15% of the loading would be M315, 23% of the loading would be M323, and so on?

If that is the case, I think you've got a very good solution. The only other question is how does the user determine how much of a % increase is acceptable before stopping the machine?

And, of course, I'd love a copy of that portion the ladder when you have a chance.

[jamesweed]

We just took delievery of a custom built 4 axis mill and I had talked to the machine builder about trying to monitor the torque of a axis to maybe shutdown if I lose inserts. I would very much like to check out your ladder work. Anyway these M codes can be set with a part program or macro and not though the ladder??? Silly question Im sure but I gotta ask.

[JIMMYZ]

Check out Montronics, have used them on Mission Critical Cuts.

jz

[xavierdemoura]

Jamesweed,

I never try make an macro, but i think that´s possible. Like i said, these ladder program do the monitoring of the load in spindle and not in the axis. But if interest to you, send me an e-mail that i explain the ladder to you.

Daniel

xavierdemoura@ig.com.br