Cylindrical Interpolation (G107/G07.1) or Inverse Time (G93)

[impyman18]

So I'm trying to post a wrapped 2D Adaptive or 2D Pocket toolpath to machine with radial live tooling with the:

Doosan Mill/Turn with Fanuc 31i control post for my Doosan Lynx LSY

1. I would like to use either a Cylindrical Interpolation (G107/G07.1) or Inverse Time (G93) and have had no luck.

The issue seems that the C axis is taking the programmed feed for the X movements and using them degrees per min which is painfully slow. 

I can use the C for postion and then mill in X and Y but that doesn't allow the cutter to say perpendicular to the radius and won't produce a correct wrapped toolpath.  

2. I'd also like to get some advice on how to lock the C and axial mill in X and Y. I can't seem to get it to post without using polar interpolation. 

Thanks in advance! 

[impyman18]

No Pros with ideas?

[paul.clauss]

Hi @impyman18

Thanks for reaching out! I spoke about these questions with the post team and have some thoughts to share.

Firstly, the Doosan post was edited today to support DPM feed rates, but it does not support Inverse time. Using the new post (available at this link) should resolve the feed rate issue.

The post will default to XY moves as long as the X-and-Y axes do not exceed the machine limits. It will then use polar interpolation. 

You will need to set the yAxisMinimum, yAxisMaximum, and xAxisMinimum to match your machine. These are defined in the "defineMachine" function within the post itself (the CPS file).

I hope this helps! Please let me know if you have any questions.

[dave_]

Hi guys i am in a similar problem with my post for our doosan puma 2600y. I have downloaded the new post with DPM and the inverse feed in it. I have a couple problems with the DPM 

-first is the calculated feed for DPM is half of what it should be.

-second the codes is using the max feed of 470.0ipm for rapid re position. The feed rate is easy enough to change in the post but the rapid is not calculating the DPM at all how do i change the feed rate for rapid reposition to DPM. 

i also have a problem with the post breaking up the C axis movements for no reason. there is no reason to not just output a single C-axis move.

i have attached a part file

IE

G1 X3.325 F470.
X3.045 F20.
C-97.063 F338.698
C-98.38
C-99.696
C-101.012
C-102.329
C-103.645
C-104.962
C-106.278
C-107.595
C-108.911
C-110.228
C-111.544
C-112.861
C-114.177
C-115.494
C-116.81
C-118.126
C-119.443
C-120.759
C-122.076
C-123.392
C-124.709
C-126.025
C-127.342
C-128.658
C-129.975

[bob.schultz]

The DPM feedrate calculations have been improved and will be in the next release of the Doosan Mill/Turn post, probably next week.  This version will also output the feedrate in DPM mode when a rapid multi-axis move is output as a linear move (G01) move.

The output of multiple consecutive C-axis moves is known and an update to HSM is currently being worked on to optimize this so that only a single move will be output.  Look for this update in a future release of HSM.

[silvio.pratter]

Hy @bob.schultz  

Can you tell me is it possible to adjust the PP so that i can output for this kind of work ( wrapped toolpath) a G107/G07.1? 

Or is it impossible thing? 

Thank you 

[bob.schultz]

Hello @silvio.pratter,

It is not possible to support G107 cylindrical interpolation at this time in Fusion/HSM or the post processors.