Topic: Dropping Information when sent

By: Gerald

Posted on: Dec 23 2009 at 01:50:51 PM

Hello,
We have just installed the trial version to our old CNC that was using an old system. We have it hooked to a BTR on a Fanuc control. We have the mahcine communicating which was a relief but what we are now finding is when we either drip feed or download the entire file into memory, some data is being dropped such as one number ina line for instance part of a dimension for an I or J loaction or drop part of for example 7.457 it may drop the 7 and only send through the .457. Nothing seems to be scrambled and it is not consistant. If we send the same program through again, it sill drop somehting at a dofferent location.

HELP

By: Guest,

Posted on: Dec 23 2009 at 05:32:24 PM

How long is your cable ? If it's too long or routed near other electrics then the signal will be Susceptible to interference resulting in the kind of data loss you've described.

Also check that all the solder joint are good - a poor contact could also cause it. During a file transfer shake the cable near the connectors - if there's a loose solder joint then it'll usually lose even more data indicating that you have bad connectors, solder joints etc.

By: Guest,

Posted on: Dec 24 2009 at 04:07:55 AM

I will check what you described. The cable is about 5 to 10 feet. We did slow the baud from 9600 to 2400 and changed the delay to 4ms and so far we haven't lost any more data. We are ocnducting a few more tests to verify. Is it possible these changes would make any difference or have we just been lucky so far?

By: Guest,

Posted on: Dec 27 2009 at 08:40:44 PM

10 feet at 9600 really shouldn't be a problem - it may just be that the btr isn't very fast so is losing data

Topic: Dropping Information when sent

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