post processor modification - coolant

[Bob W.]

How would I modify my post to shut off the coolant before the spindle retracts (in Z) for a tool change or at the end of a program? Currently the spindle retracts and shuts off the coolant just before the tool change. It retains a little residual pressure during the tool change. My mill is a Haas VF2.

 

Thanks,

Bob

[Guest]

see if this switch in in your post

 

code:

---

cool_zmove  : yes$  #Coolant off with last move

---

If that doesn't work it can always be moved

[Tinhman]

Look in your post at "General Output Settings" section, There is a line should look like this:

 

cool_zmove : yes #Coolant off with last move

 

Happy New Year.

[Bob W.]

That appears to post it as it has been. Here is an example:

 

N1930 G1 G40 X.0371 Y.1923

N1940 Z-.3724 F50.

N1950 G0 Z.1

N1960 M5

N1970 G91 G28 Z0. M9

N1980 M01

( 0.375" - .06R BULL MILL TOOL - 4 DIA. OFF. - 4 LEN. - 4 DIA. - .375 )

N1990 T4 M6

 

This is how I would like it to be:

 

N1930 G1 G40 X.0371 Y.1923

N1940 Z-.3724 F50.

N1950 G0 Z.1

N1960 M5 M9

N1970 G91 G28 Z0.

N1980 M01

( 0.375" - .06R BULL MILL TOOL - 4 DIA. OFF. - 4 LEN. - 4 DIA. - .375 )

N1990 T4 M6

 

The way it currently works is it shuts off the coolant when the spindle reaches Z0. and I would like the coolant cut before it begins retracting to Z0. Can this be done?

 

Thanks,

Bob

[gcode]

quote:

---

Can this be done

---

yes

 

find this

pretract #End of tool path, toolchange

sav_absinc = absinc

absinc = one

sav_coolant = coolant

coolant = zero

#cc_pos is reset in the toolchange here

cc_pos = zero

gcode = zero

pcan

pbld, n, sccomp, *sm05, psub_end_mny, e

pcan1, pbld, n, sgabsinc, sgcode, "G28", "Z0.", scoolant, strcantext, e

 

and move "scoolant" up to the line above it.

put it next to *sm05

 

this was cut from an old V9 mpmaster post

an X post will have variables ending with $ signs

so it will look a little different.

 

Some machines will alarm out with 2 M codes on the same line. Its been 6 yeras since I ran a

Haas. I think a Haas will accept 2 M codes on one line but I'm not sure.

If it won't you'll have to do something like this

 

pbld, n, sccomp, *sm05, psub_end_mny, e

pbld, n, scoolant, e

[Bob W.]

That did the trick.

 

Thanks,

Bob

[Tinhman]

Or you can do this

 

pbld, n, sccomp, *sm05,"M9", psub_end_mny, e

 

and

 

pbld, n, sgabsinc, sgcode, *sg28ref, "Z0.", e

 

It will do the trick too.

[Bob W.]

Okay, so the Haas will not accept multipls Mcodes in one line of code so I added the following:

 

pbld, n$, scoolant, e$

 

This adds the M9 after each M5 throughout the program except at the end. How would I go about altering the coolant at the end of the program when the machine goes to the home position?

 

Thanks for all the help.

Bob

[gcode]

quote:

---

How would I go about altering the coolant at the end of the program when the machine goes to the home position

---

it should all ready be fixed

the first line of

peof #End of file for non-zero tool

 

is

pretract

which calls up the entire retact

definition you jut edited

[Bob W.]

Here is my peof code:

 

peof$ #End of file for non-zero tool

 

#pretract

comment$

#Remove pound character to output first tool with staged tools

#if stagetool = one, pbld, n, *first_tool, e

n$, "M5", e$

n$, "G53 G90 G0 Z0. X-24. Y0. M9 (LOAD UNLOAD POSITION)", e$

n$, "M30", e$

mergesub$

clearsub$

mergeaux$

clearaux$

"%", e$

 

Is there a good reason why the pretract would be turned off?

 

Thanks,

Bob

[Bob W.]

Okay, I think I am getting the hang of this by trial and error :-) Here is my modified peof:

 

peof$ #End of file for non-zero tool

 

pretract

comment$

#Remove pound character to output first tool with staged tools

#if stagetool = one, pbld, n, *first_tool, e

#n$, "M5", e$

n$, "G53 G90 G0 X-24. Y0. (LOAD UNLOAD POSITION)", e$

n$, "M30", e$

mergesub$

clearsub$

mergeaux$

clearaux$

"%", e$