[appenzeller]

Dear community
I have a weird problem! I have a program where I have to mill an outer diameter in helix with different feed depths. That looks like this:

x250 y0 z20 ro fmax
z0 fauto
x200 y0 rl fauto
cc x0y0
lbl10
cpi 360 iz-2 dr+
call lbl 10/rep2
lbl11
cpi 360 iz-1 dr+
call lbl 11/rep2
cc x0y0
cpi 360 dr+
z20

Now I have the problem that the machine sometimes mills 1 mm too deep!!! ( from 1000parts one will be a reject)
What could be the raison???
Is it because I haven’t programmed a Inl 0 ??
Controller Heidenhain itnc530

Regards

[schwindl]

Hello

if you want to be sure then you have to work with if-inquiries.
Then you can request the final depth with the parameters.

[appenzeller]

Hello
What is an if-inquiry?
Regards

[CNCFanatiker]

Hello
What is an if-inquiry?
Regards

@ appenzeller

You will find the if-inquiries behind the soft key “JUMPS”
Here a few examples:

FN 9: IF SAME, JUMP
e.g. FN 9: IF +Q1 EQU +Q3 GOTO LBL 12
If both values or parameter is the same, jump to the stated label

FN 10: IF NOT EQUAL, JUMP
e.g.. FN 10: IF +10 NE –Q5 GOTO LBL 1
If both values or parameter not equal, jump to the stated label


FN 11: IF BIGGER, JUMP
e.g. FN 11: IF+Q1 GT+10 GOTO LBL 5
If first value or parameter bigger than second value/parameter, jump to the stated label

FN 12: IF SMALLER, JUMP
e.g. FN 12: IF+Q5 LT+0 GOTO LBL “EXAMPLELBL“
If first value/parameter smaller than second value/parameter, jump to the stated label

[JBobis]

e.g.
q1 = -6 ;1.depth absolute(infeed2)
q2 = -8 ;2.depth absolute(infeed 1)
q3 = 0 ;counter
x250 y0 z20 ro fmax
z0 fauto
x200 y0 rl fauto
cc x0y0
lbl10
q3 = g3 - 2
cpi 360 iz-2 dr+
if q3 ne q1 goto lbl10
lbl11
q3 = g3 - 1
cpi 360 iz-1 dr+
if q3 ne q1 goto lbl11
cc x0y0
cpi 360 dr+
z20

[appenzeller]

Hello everybody
I know that I can do it with parameters but I know it’s also possible with a cycle!
I would prefer not using parameter because otherwise my shift partner will struggle...
Of course many ways lead to the goal....wink.gif)

But that doesn’t answer my question about the missing Ibl 0!!!!!!
Is here anybody that is familiar with this problem??

Regards