Whats Maximum baud rate on an OM-D

[meadowtech]

baud rate 9600 is what it shows in the manual as the fastest it will go, is it really as fast as it can communicate? I'm 3D cutting a part and the machine looks like it is going faster than the information can get in.

[PSSJEFF]

I would recommend the "AICC" Artificial Intelligence Contour Control. BUT, I only know it to work on the 16i, 18i, 21i,... So maybe my advice is no good, but might be worth looking into:

AI Nano - 180 block look-ahead
AICC - 40 block look-ahead
AI APC - 15 block look ahead (standard)

PSSJEFF

[Dan Fritz]

You should be able to go at 19,200 baud. Try setting parameter 552 to "12".

Also, try minimizing the number of characters per block. Try to change your post or use a good G-code Editor to do these things:

1) Eliminate N-numbers except for those lines you might be jumping to with a macro GOTO command or an M99 Pxxxx command

2) Eliminate space characters

3) Be sure your DNC system is sending a LF (line feed) but nothing else (no Carriage Returns).

4) Set your control and your DNC system to use 1 stop-bit instead of 2. That alone will speed you up by 9%.

5) Eliminate redundant X Y or Z numbers. If you're cutting a row of points in X-Z, and Y is the same in each block, you can use just one Y command and eliminate the rest

6) Eliminate trailing zeros on the numbers. If the numbers are small, you can eliminate decimal points and just use trailing zero format (X1.2345 = X12345)

7) If you really want to squeeze a program down to size, switch to trailing zero format and, at the same time, switch to incremental (G91). You'll be surprised how small your program gets when you do this. Only use a G90 position at those points where you may have to restart the progam in the middle.

8) Test your cutting speed by timing how many seconds it takes to cut a row of points, then (with a G-code editor) count the number of characters in that row. If you're cutting at nearly 960 characters per second (at 9600 baud) or 1920 characters per second at 19,200 baud, then your baudrate and the number of characters/block is what's holding you back. If you are only cutting at a fraction of the maximum characters/second, test your DNC system to see if it's actually delivering a full data stream at that speed. Try sending that line of data to "outer space" with no CNC attached. See if it sends at the full baudrate if the CNCs is not connected. If it can't, then the DNC system may have a software limitation.

The Fanuc high-speed look ahead option will give you a big boost in the number of blocks per second you can cut. The baudrate is one limitation, the controls internal "Blocks-per-second" limitation is very different. The high speed look-ahead option will not help a baudrate problem, but it may speed you up a lot.

[meadowtech]

Thank for the reply and the information I will try the setting the parameter to12 and change from 2 to 1 stop bits. I read in an old post that parameter 0390 turns on some kind of look ahead buffer, do you know anything about this? I will check that out at the same time as I change the others.

[dcoupar]

#390 bit 7 should be set to 1. If it's 0, the control outputs a DC3 at each EOB.