[laka]

Is there a parameter on a Fanuc O-TC that will let me change on the Program Check screen where it says "ACT.F ##.## INCH/M" to read Inch/Revolution?

Thanks

[fordav11]

the ACT.F reading is set at 'per minute' and can't be changed. That's one of the things you don't get with the cheaper 0-series controls. On 15/16/18 there is another item that shows actual feed/rev when the feed rate override knob is changed plus or minus.
The cheaper controls show FEED/REV but it's only the programmed feed rate. If you override it the ACT.F changes (which of course is not helpful because it's feed/minute) but FEED/REV stays the same as per the programmed feed rate.
I believe this is the same for 21-series as well.

In any case, it's simple to work it out from your programmed feed rate. work out 10% of your programmed feed rate and multiply it by how many 10-percents you increased or decreased and add/subtract to your programmed feed rate.

example: programmed feed is 0.012 and over ride is + 20%

0.012 / 10 = 0.0012 (i.e. move decimal point one place to the left)

0.0012 * 2 = 0.0024

0.0024 + 0.012

= 0.0144

Doing it this way these calcs can be done in your head, no calculator is required.

Then simply update your program with this feed rate

[hawk1411]

You can change the display on 0i 18i 21i and 32i controls by changing parameter 3191 bit 5 and 3107 bit 3 both to a 1.

[fordav11]

Ah yes good catch! But not all of the manuals for each model have the information listed. That's why I initially said it wasn't possible.

But researching it further.....

In my 21i-A manual there is no listing for parameter 3191 and 3107 bit 3 is blank (undocumented)
However in my 21i-B manual parameter 3191 is indeed the correct parameter but it is listed as bit 0

3191 Bit 0 (FPS)
The unit function (feed per revolution) for actual cutting feedrate display
displays numerals of:
0 : Feedrate per minute.
1 : Feedrate per spindle revolution.

In the same manual the description of bit 3 of parameter 3107 is blank (undocumented)

This may also apply....
3116 Bit 4 (FOV)
In the field of specified feedrate F on the program check screen,
0 : The specified feedrate is displayed.
1 : (Specified feedrate) x (override) is displayed.


In my 0i-D manual 3191 bit 0 is undocumented.
In my 0i-C manual it says......
3191 Bit 0 (FPS)
The unit of values in the display of actual speeds in feed per
revolution mode is:
0 : Feedrate per minute.
1 : Feedrate per spindle rotation.
This parameter is valid when bit 3 (REV) of parameter No. 3107 is set
to 1.

In the same manual.....
3107 Bit 3 (REV)
The actual speed in feed per revolution mode is displayed in:
0 : MM/MIN or INCH/MIN.
1 : MM/REV or INCH/REV.

I think possibly 3191 bit 0 and 3116 bit 4 and 3107 bit 3 all need to be set to '1' to solve the 'Actual Feedrate' display problem.

[fordav11]

a quick update on this....
it doesn't work. it may work for some machines depending on system software revision but on my 21i-TA even with all 3 parameters set to 1 it doesn't do anything.