subroutine calls.. ..a living nightmare!!!

[VertikalMan48]

HELP!!!!!

 

I spent 4 freaking hours trying to debug a subroutine operation using G71 and G70 in my class today and even my teacher was at a loss about it!!! Vericut said it was O.K. to cut machine my part on the lathe but as soon as it went into the lathe, a tool path geometry error came up. With all due respect to my teacher, I can't understand why we spent so much &*2%!!! time trying to fix this: we don't even know what to look for!!! #%$!!....is this what they do in machine shops?! What a waste of $%# student time!! You would think by now they would come up with a book indicating the most common problems in manual programming especially these subroutine programs...I mean, were looking at it and looking at it. Tracing the tool path in our heads over and over while looking at the code but we can't find the freaking error!! Oh no, but The Mazak lathe insists we &*^# up on block 75...right where the subroutine call is!!

We look again and again and again...for WHAT??!!! where the %$#&* is the error???!!!this is insane!!Why did I spend 3 days writing and verifying my program on vericut only for it to be rejected by Mazak??!!..this is not the way to learn....it only discourages you in every way!!

[DavidB]

Well First Welcome,

Firstly Vericut will check the NC code BUT the controller must be setup in Vericut the same as your machine to identify any errors.

 

If you can send the code I'll have a look at it for you.

 

Can your machine do G71 cycle?

Has this example been done before at school or is this a new example.Surely you could have cross checked against a program that has been run before.

 

From experience you will find the answer and it will be something very minor you are over looking.

 

 

[Charles Davis]

This is why I am able to make a living as a Mastercam dealer. Tracking down and fixing post processor issues can be a major time hog and headache.

 

To turn a phrase, "This IS rocket science!"

[Philcott]

VMan,

 

First of all, welcome to the forum. Second, you need to calm down a bit. We all get frustrated from time to time but raving on about it doesn't get the problem solved. Coming here and explaining your problems, in detail, will usually give you a good chance of getting your problem corrected.

 

quote:

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we don't even know what to look for!!!

---

If you post your troublesome code and the error message you are getting here, we can have a look at it and try to find out why it is not working. The next step would be editing the post so it gives you the correct code.

 

G71 and G70 are not called sub-routines, they are canned cycles. There are a number of common errors that new programmers often overlook when useing them. A couple of the most common are not having the correct line numbers for the "P" and "Q". The other is not having the contour path follow a constantly increasing or decreasing direction.

 

Again, post some code so we can have a look

 

Phil

[Guest]

VertikalMan48:

 

Experience is the best teacher. All does not run smoothly in a machine shop. Trouble shooting skills are very valuable. Calm down. Learn how to ask a good question and you will generally get good answers.

[JG]

quote:

---

The other is not having the contour path follow a constantly increasing or decreasing direction.

---

Type 1 does not allow a reversal, type 2 allows one axis to reverse.

 

post some output or even better upload the file to the ftp.

 

Jg

[Philcott]

JG,

 

Not to hi-jack the thread but can you elaborate a bit on this?

quote:

---

Type 1 does not allow a reversal, type 2 allows one axis to reverse.

---

I have not heard of Type 1 and Type 2 canned cycles. Are these machine specific?

 

Phil

[JG]

In turning there are two G7X cycles available, type 1 (no axis reversals allowed)and type 2 ( single axis reversals allowed), I think there are parameter selectable.

 

Jg

[PE @ IHS]

Type 2 works as an optional parameter that allows undercuts. In the real world, we would post the code long-hand instead of spending 4 hours trying to make G71 work, and your part will be fine.

[Jack Mitchell]

Hopefully these are clear enough to comprehend.

As ran for years and years on an Ikegia AX20N CNC lathe (Fanuc 6T)

 

 

Regards, Jack

 

[ 02-02-2005, 03:27 PM: Message edited by: Jack Mitchell ]

[Jack Mitchell]

Damn, timed out on the edit.

 

Right click and save as over each picture, then you would have the opportunity to enlarge the view as required.

 

Regards, Jack

[Philcott]

I once ran a cnc lathe that would turn undercuts in a G71 canned cycle an long at the first "U" value was greater than the step down of the undercut. Came in handy but also had limitations.

 

Phil