Problem- tool change in DNC mode with fanuc OM controller-KIWA Excel 510 machine

[flaheu]

First, this forum is great !

Here is my problem:

I'm doing molds and my programs are very long, memory is limited to 48K.
For this reason I use DNC with Cimco 5.
The program runs good until a tool change, then it stops and after +/- 15 sec, the red feed fold buton lights up.
Here is an example showing the end of the first operation with the first tool and the begining of the second operation, where it blocks:

-----------------------
X317.643 Y-46.021
X317.744 Y-45.711
X317.834 Y-44.943
Y-39.721
G0 Z34.
Z200.

G0 G17 G40 G49 G80 G90
G91
G30
Z0
(TOOL - 0 DIA. OFF. - 0 LEN. - 0 DIA. - 10._3∞)
T2M6
G0G90G56X94.271Y-111.572
S1500M3
G43H2Z100.
Z43.
G1Z26.5F150.
X94.484Y-106.577F300.
X89.701Y-101.369
X88.605Y-101.323
X88.242Y-101.294
X87.151Y-101.167
X86.959Y-101.141
X86.889Y-101.131
X86.702Y-101.098
X85.607Y-100.885
---------------------------------
Any help would be greatly appreciated.

Thx

[CHAD LAWSON]

I would check the ladder on the machine and see what conditions need to be met to allow tool change. I run into sometimes with Fanuc spindle motors if the BZ sensor in the back of the motor is acting up the ORAR signal for the spindle orientation position will turn of and on rapidly. Usually something like this will not generate an alarm but will stop the machine from changing tools. If you have a maintenance person that understands reading ladder you can read through the ladder and check to see that each item has been met and the high or low signal is maintained in the proper state. Our you getting an alarm? If you feel it is your program do you have another machine you can run it in and simply cut air for a test cycle?

[flaheu]

In fact no alarm arises, just the feed hold reb button is lit.
I don't think it's a "hardware" problem, because, when I enter G91 G30 Z0 in MDI mode the spindle goes up in front of the tool changer, and then I enter Tx M6 and the spindle goes picking the tool.
I'va also noticed that I've got 2 protected programs O9001 and O9002 for tool change operation.
My feeling is that I put a wrong sequence of codes or in the other hand I miss some codes to properly start the tool change.
Can somebody post a code example from a similar machine ?
I have to run in production very quickly, any help is more than apreciated.


Thx

[CHAD LAWSON]

most Fanuc controllers do not need you to send the axis home during the tool change process. The macro program for the tool change program will normally send all axis to the proper positions for the tool change process. I beleive this is your 9001 macro program. There is also usually a seperate macro program used mainly for changing heavy tools which may be your 9002. On all of our Fanuc machines you can run tool changes in MDI mode with the axis in any position by entering TxM6; and hitting the cycle start push button. The axis will then move to the tool change position. You may try this with your machine, if it works you can take out you line of program where you send Z axis to the tool change position. A nother not is that not all machines consider the tool change position zero.

[Daleb]

I'm not sure why you have a G91 right after a G90, but I always stop my spindle (M5) in my main program and depending on what style tool changer you have some need to have the T2 & M6 on different lines.