How to change Fanuc 10tf from metric to standard?

[blakemachine]

After getting my Hitachi lathe, somewhat functional, am trying to figure out how to change it from metric to inches? What parameter should I be changing, and from what to what. Fanuc 10tf. Thanks guys.

[angelw]

Originally Posted by blakemachine After getting my Hitachi lathe, somewhat functional, am trying to figure out how to change it from metric to inches? What parameter should I be changing, and from what to what. Fanuc 10tf. Thanks guys.

Simply program G20 (imperial) at the beginning of your program before setting the coordinate system.

1. Once either G20 (imperial) or G21 (metric) is executed, the machine will default to the respective system when the machine is next powered up.

2. The Inch/Metric system must not be changed during the program, other than at the beginning before the coordinate system is set. That is, you can't swap between the two systems, for example, to cut a metric thread and then swap back to Imperial mode.

3. When switching G20 to G21 or the other way, the work coordinate system shift amount must be reset according to the input unit. The tool offset values are automatically switched between imperial and metric.

Regards,

Bill

[gbowne1]

Read your operator manuals... but..

also look at this recent thread:

http://www.cnczone.com/forums/fanuc/...te_metric.html

Oh, you might wanna try your S code first then M03 or M3. Somtimes it does not work the other way around ie say something like.. M3 S200.

Greg

[blakemachine]

Ok, I understand the G20 G21. So is it because if it has metric ball scews, is why you cannot change the entire machine, to where it does NOT display any metric values, but all american? I am just wanting to see only inches, as far as the position page, etc.

[dlokon]

I can't tell you which parameter to change, only that it is a parameter change that needs to be made. Unfortunately, I got rid of all of my Fanuc manuals a couple of years ago. However, from many years of experience, I can tell you that if you call Fanuc directly, a service tech should be able to tell you which parameter to change.

Also, If you're interested in any of the Fanuc options that are available, I have the parameter list and directions on how to change the option parameters....

[stevo1]

Blakemachine,
Take a look at the link Greg posted in post #3, it will help explain some things. In that thread we were discussing why the coordinate systems would not update metric to inch and vise verse. It has nothing to do with metric ballscrews.

You can setup your machine to display all inch if you choose to do so. Now if you are going to switch back and forth then I would make sure you have the proper parameter set to change the tool offsets and custom G-codes programmed so that your workcoordinates switch as well. This can all be found in the thread Greg posted.

Bill,
Out of curiosity does the 10t have the same setting as the 15t that you can use G20,G21 or G70,G71 for changing the system? I don't have a 10t manual and I remember beating my head against a wall a few years back on a 15t control because it was set to use G70 and G71 instead of G20 and G21.

Stevo

[angelw]

Originally Posted by stevo1 Bill, Out of curiosity does the 10t have the same setting as the 15t that you can use G20,G21 or G70,G71 for changing the system? I don't have a 10t manual and I remember beating my head against a wall a few years back on a 15t control because it was set to use G70 and G71 instead of G20 and G21. Stevo

Hi Stevo,
This is dependent on the G Code system of the control. With a lathe, system A and B use G20/G21, system C uses G70/G71; system C was optional. Bit 6 and 7 of parameter #2400 are used to select the system. With a machining center, bit 2 of #2400 is used to select between G20/G21 and G70/G71.

Regards,

Bill

[gbowne1]

I actually thought of this post I saw.

FAPT Fanuc 10T change from Metric to Engilish?

You have a 10T with FAPT? This might help a bit.

Greg

[sinha_nsit]

Originally Posted by blakemachine Ok, I understand the G20 G21. So is it because if it has metric ball scews, is why you cannot change the entire machine, to where it does NOT display any metric values, but all american? I am just wanting to see only inches, as far as the position page, etc.

I do not know about your control, but on 0i, parameter 3104#0 (MCN) is set to 1 for position display in input unit.