O-MD DNC

[extonson]

hi - I have a chevalier 2040 VMC with fanuc OMD control , I use One CNC professional 2000 to program , and send all files from pc to cnc - no problems. Today I had to cut 2 large internal threads and the file was too big for the cnc memory - so I tried to DNC (not done this before) and after about 220 lines I got the buffer fault - 087 I think.I tried to slow the com port as described elsewhere in this forum, but no good - so I broke the program up and uploaded as per normal and got the job done. I have more 3d stuff to do now and I would like to get this sorted - any ideas??

[samu]

wath is your baud rate, try to slow down. Start at 2400 baud and if it works fine, increase it until you get 087 alarm.

[extonson]

9600 baud - I have tried this and if I slow it down it no longer recieves files from the pc - put back to 9600 and all ok - sends and recieves files to memory - just no DNC (after about 220 lines)

[stevo1]

You have to slow the baudrate in the CNC and in the PC. They have to be set to the same. That is probably why when you slow down the baudrate the CNC does not get the data. If you can send programs at 9600 you can send them at any speed below that.

If you are using Port 1 it is parameters 552 or 553 depending on the IO channel?
=11(9600baudrate)
=10(4800)
=9(2400)
=8(1200)

Stevo

[extonson]

I have not yet played with the parameters - what is the proceedure?

[stevo1]

I do not have a lot of experience on the OM control but this is what I got for a procedure.

I am pretty sure you have to be in Estop mode.
Select the MDI mode.
Press the function button [DGNOS/PARAM] to display the parameter setting screen.
Key in address “No.” and value “0” in the stated order, then press the [INPUTJ button; the setting parameter screen will appear. Set PWE = 1. The PWE bit allows you to make changes to your parameters.

Now you should be able to go to the parameter you want and change it. Set PWE back to 0 when finished.

If you never changed the parameter baudrate in the machine but you were adjusting in the PC that is why you could not send data.

Stevo

[extonson]

thanks - I will try in the morning and see what happens.

[GPena]

Please also check your cable configuration, the better is:
PC NC
DB9 DB25
2-------------2
3-------------3
5-------------7

1] 4]
6]SHORTED 5]SHORTED
4]
6]
7]SHORTED 8]SHORTED
8] 20]

Also you can connect the phisical ground of your computer to be the same in your NC.

This solved my DNC problem once.

Good luck.

GP.

[Al_The_Man]

Originally Posted by extonson I have not yet played with the parameters - what is the proceedure?

If you want the RS232 manual for the 0, send me a PM with a email add.
Al.

[extonson]

Thanks guys - sitting in front of machine running DNC right now - slowed down to 4800 - again many thanks.
Don.

[dantkaledd]

hi I am dinesh,

to avoide buffer over flow can you just reduce the buffer rate of your PC.

i tried to many machines and it was working.

Also can you mail me the tool change micro programe it might be O9001 program.

it will be help fule for me.

Thanks