Post help

[Davidimurray]

Hello

I've just been modifying a basic post-processor to suit the 1985 Denford Triac mill I have access to. I've now got everything tweaked to my satisfaction except for one thing. For feed rates in the X and Y, the triac requires FX to be defined, for moves in the Z, FX must be defined - e.g.

G01 X150 Y50 FX100 Z150 FZ50

However, what the post produces is :-

G01 X150 Y50 F100 Z150 F50

If I change the function defintion to FX then it replaces F wih FX
all the time. Mastercam seems to know the difference between feed
and plunge rates - but assigns the same variable to them both. Is
there a way that I can get the post to insert FX and FZ as
appropriate ?

Any help would be great

Thanks

Dave

[DAB_Design]

Davidimurray, I've had to configure a post myself. If you want to post/send the actual post file, I'd be more than willing to take a look and see if I can help.

And if I can't help, there's several that will also be of assistance....guaranteed.

*edited because I can't read*

[CAMFUN]

David, what version of MC are you using?Send me the post please, and I fix for you.

Regards

Daniel

[Davidimurray]

Hi everybody - thanks for the offers of help. I'm using MC 9. Please find enclosed the post file. It works just fine except that X and Y moves should be associated with a feed FX and Z moves should be associated with an FZ feed. At present all of them output FX and then manually go through and change the required ones to FZ.

Thanks Again

Dave

[DAB_Design]

I was sitting here going through this, and got to thinking about something. How do you input 2 different feedrates in mastercam? I've never seen the option of having a feed for X and/or Y and a different feed for Z.

[mark c]

You can actually have 3. The first is for x & y. This is on the define tool page as feedrate. there are also plunge and retract feedrates available there

Mark

[DAB_Design]

Doh! Didn't even think of it that way. Now that you mention it, the plunge rate could be for X Y and Z (if ramping).

But I don't know of any place to define 2 different feedrates for use on the same line.

[mark c]

It's up to the post to take the 2 types of feedrate and manipulate them so you get the desired result. Every post I've ever worked with just has one feedrate and whether it's used with z or x & y (or x, y & z as in the case of helical) determines if it's plunge or contouring. I've never seen one to output one such as asked for, but I'm sure it can be done. Might take a crack at it myself

Mark

[CAMFUN]

Hi David, I´m working in your post.I don´t read your reply before because a long holiday that we have here.But now all it´s Ok again.I already solve the problem.I´m testing now.Hang in there!!!!

[CAMFUN]

David, I put in attach with this reply your post.
I create a rule in pst that when you have a move only in Z, put only FZ, when you have a move only in X or Y or both, put only FX, and when you have a 3 axis moves (XYZ) or X or Y move combined with Z (XZ OR YZ) the post put FX after X/Y values and FZ after Z value.
Try and report to me your results.

Like below:

G90
G71
G54 X0 Y0
M06 T2
M00
( CHANGE TOOL )
G98
M03 S2800
G00 X-15. Y5. Z2.
G01 Z0. FZ215. <- Only FZ
G01 X-20. FX230. <- Only FX
G03 X-25. Y0. CX-20. Y0.
G03 X0. Y-25. CX0. Y0.
G03 X25. Y0. CX0. Y0.
G03 X0. Y25. CX0. Y0.
G03 X-25. Y0. CX0. Y0.
G03 X-20. Y-5. CX-20. Y0.
G01 X-15.
G00 Z200.
G00 X-102.186 Y62.554
G00 Z50.
G00 Z2.
G01 Z0. FZ220.
G01 Y57.554 FX111.
G03 X-97.186 Y52.554 CX-97.186 Y57.554
G01 X-89.686
G01 X91.685 FX110. Z31.98 FZ110. <- 3 axis move - FX and FZ respectively
G01 X99.185 FX111.
G03 X104.185 Y57.554 CX99.185 Y57.554
G01 Y62.554
G00 Z50.
M06 T3
M00
( CHANGE TOOL )
M03 S3000
G00 X-3.922 Y-66.05 Z-.107
G01 Z-2.107 FZ124.
G01 Y-64.52 FX123. Z-.126 FZ123.
G19 G02 X-3.922 Y-57.199 Z8.278 CX0. Y-2.138
G02 X-3.922 Y-49.89 Z13.5 CX0. Y-36.916
G02 X-3.922 Y-41.313 Z15.459 CX0. Y-41.313
G02 X-3.922 Y-39.686 Z15.392 CX0. Y-41.313
G02 X-3.922 Y-31.878 Z13.972 CX0. Y-42.853
G02 X-3.922 Y-23.884 Z11.555 CX0. Y-107.71
.....

Hope that helps.If work let me know.

Kind Regards

Note: Sorry my Bad English.

[Davidimurray]

Hi camfun

I've run the post a couple of times and all appears well. I haven't had time to test on the machine yet as I've been adjusting the gibs and sorting out a couple of other problems. As soon as I run a test (hopefully in the next few days) i'll let you know how I got on.

Finally I'd just like to say a BIG BIG thanks to you for all your help. You've made me a very happy man.

Thanks Again

Dave

[Davidimurray]

Hi Camfun

Ran a test program last night and everything worked perfectly.

Thanks for the help - much appreciated

Dave