Disclaimer: CNC Concepts, Inc. accepts no responsibility for the use or misuse of if you could send me a list of the benefits between using G96 instead of G Constant Surface feet spindle speeds – G96, G97, G77, G To use the following codes the OmniTurn must be equipped with a spindle control package. TwinCAT CNC Axis Commissioning G97 Deselection of constant cutting speed , selection of spindle speed (modal, default) Using the G-functions G96, G97 and G, the interpretation of the S-word (or S-strings) can be optionally changed.

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We do a lot of turning of parts that have changes in diameter. G97 S M3 Your chuck will start revolving clockwise at rpm. I thought it was the BTR but it tested ok.

Or sign in with one of these services Sign in with Facebook. And if, for instance, you program the cutting tool to go to the spindle center in X, as is done when facing a workpiece to center, fnc spindle will run up to its maximum speed in the current spindle range. However, when you program to use G96 in Mastercam, you will see an initial G97 move at the toolchange.

In all cases, the reader is totally responsible for considering the implications, good and bad, of implementing one or more of the techniques we show.

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Where diameters changed, particularly when facing, it made a massive improvement to tool life and surface finish as well as speeding up the whole process. What I really mean is that the most important thing is to understand what the machine can do and the concepts of programming and Basic Turning. If you program G96 S Subscribe to eMastercam News. We simply publish information we feel will be of interest to CNC users.

Basic Turning G96 G97 – CNC Programmer Training

I had my own shop after that for 6 years, went to work for other shops for the last 4 years and now Im back on my own again. With manual lathes, there is no such thing as constant surface speed.


I wasn’t clear on what to change, I thought that changing G97 had an effect on the way it works. Originally Posted by MJR7. Could be a problem. Now, you could program G97 S At this point the constant surface speed mode is re-selected with the proper speed in sfm. This message will be removed once you have signed in.

Posted December 9, Sign In Sign Up. How does someone who’s been programming for 10 years not know what constant surface speed is? In this way, the wasted change in spindle speed will not occur, and when the next tool is in position, the spindle will be running at its correct rpm.

I am in the process of buying another used lathe but want to keep using this one if it is possible to fix it. Depending upon your spindle g69 system’s response time, it will likely take longer for the spindle to slow down than for the rapid motion to occur. Create an account or sign in to comment You need to be a member in order to leave a comment Create an account Sign up for a new account in our community.

Use your display name or email address to sign in: If you work exclusively in the constant surface speed mode, the spindle will always be rotating at the appropriate speed – matching the diameter the cutting tool would be cutting. No matter what, it’s When you use G96, it changes. Now on the big two foot diameter one it took him ages just to get it h96 spin around once. This website or its third-party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy.

G96 however means metres per minute. In this case, many programmers will calculate the appropriate speed in rpm and run the machine in rpm mode. During this motion, the spindle will slow down. While this is great during each tool’s cutting operation, consider what happens during tool changing.

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Cnv when you’re working in constant surface speed mode, cycle time is inversely proportional to spindle speed in rpm. All parameters look ok and I have re entered chc all. Share this post Link to post G7 on other sites.

The cncc time I programmed a lathe was when I started my own shop in 05, before that I had never programmed a lathe. Theres a difference, dont put words in my mouth. G96 constant surface speed control according to the list of G codes.

Siemens SINUMERIK 808D Programming And Operating Manual: Constant Cutting Rate (g96, G97)

This mode is only used for single point turning tools boring y97, turning tools, grooving tools, etc. I know what it is, and I have always understood the concept. Poor workholding setups – Since speed in rpm is difficult to determine when working in constant surface speed mode, it should only be used when making adequate setups.

So if you programme. Industrial Forum Existing user? My next question is, how does it determine G97?

On the outside your speed is too fast and when you get to the centre you are too slow. Login to Your Account. G996 will be slow at the OD, and as it moves closer to X0, it will speed up until it hits the max spindle speed.

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But if you’re workholding device cannot grip with adequate force, of course, you cannot run at optimum speeds. Wasn’t trying to take a shot at you.

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