[Lars van Meer]

Hi

Im working on a OKK mill with cnc fanuc om control.

The 30year old machine is for the first time by me fired up.

seems a lot of fun but the toolchange gives problems.

on the machine is a big vertical carroucell with a arm who turns 180degrees.

when i wand to change the tool for the first time it looks good but stops when the arm is under de main axis.

and gives alarm 2032, 2033 after reset.

parameter 0240 is 6

Tool change program is 9000
Tool change program m6 is 9001

What is going wrong? And how can i get that arm back to start position?


O9000
(TOOL CHANGE T);
G0 G91 G28 Z0 M5;
G49;
#500=#149;
;
IF (#501 EQ #500) GOTO1;
;
#501=#500;
;
G4 X0.5;
;
T#4120;
G4 X0.5;
N1;
G90;
M99;



O9001
(TOOL CHANGE M6);
G49;
G91 G0 G28 Z0 M5;
IF (#502 EQ #500) GOTO1;
;
#502=#500;
;
G4 X0.5;
;
M19;
;
G4 X0.5;
M6;
N1;
G90;
M99;


THANKS,
lars

[zavateandu]

did you checked the unclamp sensor for the tool?
if is not confirmed ,will not continue to take off the tool from spindle and rotate 180 degrees.

[angelw]

Hello lars,
Tool Change can be carried out entirely by the PLC, or with varying amounts of involvement from a User Macro program. The example Macro Programs you've listed indicates that the Tool Change is carried out almost entirely by the PLC.

1. Program O9000 is being called by a "T" code, with #500 and #501 being set the the Tool Number in the Ready Position

2. Program O9001 is being called by M6, and sets #502 to the Tool Number that will be changed into the spindle, and therefore will indicate the Spindle Tool until changed again.

You have stated that parameter 0240 is set to 6, therefore program number O9001 will be correctly called. Ensure that parameter bit 0040.5 is set, so that program O9000 is called when a "T" code is executed.

Even if parameter 0040.5 is not set, a Tool Change should still occur by the execution of M6 in program O9001. The fact that the Tool Change mechanism starts to move indicates that M6 in the Macro Program, where its treated as an ordinary "M" code, is being executed.

Depending on the actual version model of your 0M control, you may, or may not be able to view the PLC (PMC in Fanuc speak) Ladder at the control. In either case, there should be a Hard Copy of the Ladder, and from that you will be able to follow the sequence of the Tool Change, and what proximity switches (real inputs to the PLC) and there required state for the Tool Change to continue and complete. There may be a number of proximity switches involved. Tool un-clamp as stated by toolzavateandu, and an in position proximity for the Tool Change Arm will be two.

After a "T" code has been executed, either via a program in Memory Mode, or MDI, observe the value of Macro Variables #500 and #502. #500 should be the number of the tool in the Pot at the Tool Change Position, and #502 should be different to that of #500 for a tool change to occur. If these Macro Variables meet this criteria, executing M6 should launch the Tool Change.

What is going wrong? And how can i get that arm back to start position?

Often there will be a "Recover from Tool Change Failure Sequence" detailed in the books that came with the machine. If the Tool Change Arm mechanism is driven by an electric motor, often the mechanism can be brought back to the start position by removing the fan cover of the motor, and manually rotating the motor shaft to either complete the Tool Change sequence, or to reverse the sequence that has already occurred. If the system is Hydraulically driven, you may be able to manually actuate the hydraulic valves to return the mechanism to the start position. Extreme care is required here to ensure that the correct hydraulic valve is forced to operate. In any event, consult whatever information you have, or can obtain, so that you have an understanding of the Tool Change sequence, and how the mechanism works before trying to drive it manually.

Regards,

Bill