Inverse time/ ipm feed

[PROG_MAN_DO]

I don't need inverse time on every toolpath in the program I am running. The only way I see to output ipm feeds for a specific path is to turn off inverse time (post setting), then re-post the sections I want at ipm and do the cut and paste thing. which is not desirable for obvious reasons..Any suggestions?

[Allan Brown]

What about something like

 

if cuttype = zero, use_frinv = 0

else, use_frinv = 1

 

e.g. base the use_frinv switch on the cuttype, or opcode, or rotary_axis, etc.

[PROG_MAN_DO]

That would be great!! Where do I put it in the post?..What is the cuttype for rotary axis? Sounds simple, but I know it isn't so, there always seems to be more required, and not being a post expert adds to the mix...

 

I imagine something related to rotary axis would be best since I am using contours for several profiles..

[Christian Raebild]

You would need to put that in the psof, ptlchg and ptlchg0 postblocks.

 

You will need to find some variable that identifies whether you will be wanting inverse time feed or not. That can be a misc. value which you set when you make the operations, or you can automate it using some other variable.

 

It is difficult to tell which variable (or combination of variables) would be needed to automate it, without knowing in which cases you need inverse time feed, and in which cases you do not need inverse time feed.