5 axis Post processos 1

[lipee83]

Hello. I have (i made) my own postprocessor, which is working well on any axies (when i mill something directly on any rotated axis). Now i started ti check how it is working when i'd like to mill a 3d surface, with a multi axis moving, but something wrong, and the tool is go to a wrong position. I am sure something is wrong in my post, but i didnt find yet.
Is this any special command what i must use in this milling type?

 

[kukelyk]

what controller?

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kukelyk

 

[lipee83]

Heidenhain iTNC530 (for HERMLE C800U)

 

[jelmerra]

The machine works best with some kind of tcpm when cutting multi-axis mode.

When using M128 or TCPM coordinates are relative to the part and not relative to the machine.

The coordinates need to be mom_mcs_goto instead of mom_pos.

Initital coordinate before you switch to M128 should be in machine coordinates.

 

[lipee83]

My post just turn of the simultan milling with M129 with this operation. I changed the linear movement coordinates to mom_mcs_goto, now looks like the linear movement is go to the good position, but the rapid movement is still in the wrong position. how can i modify that? Meanwhile i started a totally new/empty post, and i just checked with that what it's do with my operation, ant there the rapid movement is also good, and there it's still mom_pos standing same like in mine, but there also the post turn on the M128. Maybe should be better if i start everything again from the begining, and not from the "original" hermle post what i found on the nx support site.

 

[jelmerra]

maybe it is a better idea to write a procedure that makes mom_pos mom_mcs_goto and put that procedure in the MOM_linear_move and MOM_rapid_move. You can either use a ude or some logic to sense multi-axis milling operations to switch between mom_pos and mom_mcs_goto output.

The rapids will need some adjustment too in multi-axis mode because xy z sequencing will in some cases damage the part.

 

[kukelyk]

Try FUNCTION TCPM instead of M128

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kukelyk

 

[lipee83]

Thank you / Köszönöm.

I found the basic problem. If i just make a save without any modification from my "basic" post, my newer post builder modify almost every command and prompt in the post, thats why it's started to be wrong.