Post processor editing

[Nadroj88]

Hi!
I could use some help as i am new to editing mastercam posts. Ive got two major problems.

For some reason it always gives me a -2.0 feed rate and at the beginning of each operation it returns to the part's zero before going where its supposed to.

As you can imagine it gets tedious fixing every single operation. Id appreciate it if someone could tell me how to fix this.

[txcncman]

My first suggestion is just try a different post processor. If that does not work for you, attach a copy of the post processor you are using, a copy of the posted program, and a copy of the posted program with the corrections made that you want with those corrections well noted.

[Nadroj88]

Ok. The post i am using is the best ive got so i cant use another one. so here is my processor and a bad program for a simple 4plc. 1/4-20 bolt hole pattern on a 3" dia. and a good copy of the same program. thanks

[txcncman]

Look for these lines in the post:

pfr # Feedrate W/O Negative Feedrates
if fr$ > 0, fr$

I think you might need to add like this:

pfr # Feedrate W/O Negative Feedrates
if fr$ > 0, fr$
if fr$ < 0, fr$=fr$*-1

On the redundant line output, look at:

prapidm # Linear line movement - at rapid feedrate
psubseqn
if mi2$ = 0, n$, pccdia, *sgcode, *x$, *y$, *zr$, pfr, *ss$, *spdlon
if mi2$ > 0, sn, pccdia, sgcode, x$, y$, z$, pfr, ss$, spdlon

Try commenting out one of the lines and see what happens, like:

prapidm # Linear line movement - at rapid feedrate
psubseqn
if mi2$ = 0, n$, pccdia, *sgcode, *x$, *y$, *zr$, pfr, *ss$, *spdlon
# if mi2$ > 0, sn, pccdia, sgcode, x$, y$, z$, pfr, ss$, spdlon

[Nadroj88]

Ive made the changes you suggested and touched nothing else, but when i saved it and tried to load it into mastercam it gave me 3 errors.

1st it said: "corrupt or invalaid file" then when i clicked ok it said "selected machine definition file is not valid" again i clicked ok and it gave me another message "selected machine definition file not found"

is there a certain way i have to reload the post?

[txcncman]

Did you change the file extension back to .PST?

[Nadroj88]

I had not but i just did that now and it still gave me the same 3 errors

[txcncman]

What editor are you using?

[Nadroj88]

The default one the comes with mastercam

[txcncman]

I just used Default mill and attached your my-post-processor-code.txt‎ changed to PST and posted the following code:

O100 G0 T1 M6
N110 G0 X214681 Y111381 Z1000 S1069 M3
N120
N130 G1 Z-10000 F64
N140 X215565 Y112265
N150 G3 X215931 Y113149 I214681 J113149
N160 X215931 Y113149 I113421 J113149
N170 X215565 Y114033 I214681 J113149
N180 G1 X214681 Y114917
N190 G0 Z1000
N200 M2

[Nadroj88]

What do you mean you attached the code? i didnt even know you could do that. i saved the code, after i made the changes, under a different name and tried to load it as a whole new post. please expalin how you attached it

[txcncman]

What do you mean you attached the code? i didnt even know you could do that. i saved the code, after i made the changes, under a different name and tried to load it as a whole new post. please expalin how you attached it

I attached your POST PROCESSOR (my-post-processor-code.txt‎ changed to PST) to MasterCam's Default Mill. Do you know how to access and use Machine Definition Manager?