Newbie- tool number disappear after power off

[mcv300]

hello,

I am new to fanuc 0imd , i found that the tool number for the program is lost after power down

each time the machine need to run a program after power down ( lunch break for instance), I have to type in mdi Tx M6 , otherwise alarm will appear

any comment or suggestion ?

[angelw]

Originally Posted by mcv300 hello, I am new to fanuc 0imd , i found that the tool number for the program is lost after power down each time the machine need to run a program after power down ( lunch break for instance), I have to type in mdi Tx M6 , otherwise alarm will appear any comment or suggestion ?

Whats the difference between the command being read in your program and programming it in MDI. Post the segment of your program where the alarm occurs, and outline more concisely the circumstances how and when the alarm occurs.

Regards,

Bill

[mcv300]

Hi Bill,

I always put the switch at MDI before swiching the power off.

Before the machine went off, on MDI program display , it shows tool number in the spidle as T1 , next tool as T2, etc

After power on, still at MDI display, the tool number in the spindle T1 disapeared, Next tool shows T2 , etc

So only the information about the tool number in spindle is gone, all others are there

If I switch to auto and press cycle, alarm goes on said that I have to check the tool number.

If this happen I just push the feedhold, switch to MDI, input T1 M6 for example, start, and then everything is normal

my machine is first mcv 300 / sharp sv2412
previously with 0imc , they put tool information on external LED tool display, but this time with 0imd, they put the tool display on LCD screen

I will take a picture on friday ( tomorow is holiday here )

Jon

[stevo1]

Can you post the part of the program that is giving you the alarm as Bill had asked for?

It sounds like where you are trying to re-start the program you have no information of what tool you have. IOW there is no tool call in the program where it is alarming out.

How long is your lunch? Is there a reason that you power down the control when going to lunch? I can see over night but for a 30-60min?? I ass u me that you get the same problem when you come to work the next day after powerdown overnight?

Stevo

[mcv300]

Hi,

Please see attachment, one picture taken before machine shutdown , the other after shutdown / power off ( picture with red undeline )


As for the part program, it ends with
G28 Z0
G28 X0 Y0
M30

[angelw]

Originally Posted by mcv300 Hi, Please see attachment, one picture taken before machine shutdown , the other after shutdown / power off ( picture with red undeline ) As for the part program, it ends with G28 Z0 G28 X0 Y0 M30

I'm not quite sure what you are trying to do when you power up the machine again. Are you expecting to be able to just press the cycle start button and start the program from where it was prior to power down? There are certain G codes that the control defaults to on power up. These are mostly set via parameter, and codes such as G20 and G21 set their default bit when they are executed in a program. The spindle tool number is stored in the system variable of those machines that have the User Macro option, but I'm unaware that its shown as the current spindle tool on Power Up of the machine. Further, with a well structured program, and in normal situations, there is no need to check what the default values are, because the program will take care of placing the machine in the correct mode for the part of the program being run. For example, once G20 or G21 have been programmed, the machine will default to which ever code was programmed in the program prior to the power being withdrawn. If the default was G21 when the machine was Powered Up, and if the next program was in Metric format, it could be successfully executed without including a G21, but it's better practice to have the G21 code in the new program.

Even when restarting a program without the power being withdrawn from the machine, its good practice to allow the control to read the tool number again and not relying on it maybe still being in the spindle. There are some machines that object to this. I've seen a few machines that will generate an alarm if the Spindle tool is called, but most machines today have good tool change routines that look to see if the called tool equals the spindle tool, and if so, quits the tool change program.

For members of this forum to give you any help, I'd suggest that you post your program so that it can be seen how your program is structured. The program snippet you've provided tells us little, except that the three slides are being sent to the Machine's Reference Return position at the end of the program; what relevance does that have to your problem?

What is the error being displayed when you don't input the T number via MDI?

Regards,

Bill

[canwong]

You may check the battery inside the controller, sometimes the battery dead will cause the problem.

[dcoupar]

In the fanuc1.jpg, the blank T would display the number of the last T read by the program... if one had been read. Since you just powered-up the machine, no T code has been read. The same is true for S and F if display of those was turned on.

If you run a program after power-up with a G01 move but no F code active, you'll also get an alarm. Same for the spindle; if you command an M03 with no S code active you'll either get an alarm, or the spindle won't rotate.

So, as steveo1 suggested, post the program here and maybe we can help you.