Parameter of machine's Z

[qmas99]

Hi,
When we take tool length offset and use INPUT C button, we will have Relative's Z, what parameter do I need to change to get machine's Z when using INPUT C?.
Thanks

[dcoupar]

As far as I know there is no parameter to change that. You should zero out the Relative position display before setting tool length offsets.

[qmas99]

I think there is, because we have Enshu EV450 can take machine's Z,it doesn't add or subtract the Z value already in the work offset.

[dcoupar]

On the Enshu, do the Machine and Relative position displays agree? What model control are you having the problem with?

[qmas99]

all the machines have Fanuc 18i, on the Enshu doesn't matter what the Relative Z is, always use Machine Z for TLO when INPUT C is pressed.

[dcoupar]

Here's the section from the 18iM Operator's Manual on Tool Length Measurement using [ INP.C ]. Please note step 8 on the 2nd page.

I have also done a search of the Parameter Manual pdf, and find no reference to a parameter to select the Machine Position rather than the Relative Position when using [ INP. C ]