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Inverse Time Feed Rate & Fanuc Alarm 003 'Too Many Digits'


Bret Vanderhyden
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I've programmed a part with 4th axis simultaneous motion that I'm trying to run on a Kitamura HX300iF with a Fanuc 16i-mb controller. The inverse time feed rates are really big (xxxx.xx) which causes the fanuc control to throw the 003 'too many digits' alarm. As far as I can tell, the F register on the 16i-mb has a 3.2 format so anything over 999.99 is a problem. I adjusted the max inverse feed rate in the machine definition to 999.99, is that the best way to control the inverse feedrate so that it doesn't cause a problem for the control? Does anybody have experience with this type of problem on fanuc controls? 

 

Thanks

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Yes that is the best way and with that control I have to assume the machine has some age to it and might be the best you are going to get out of it. The bigger numbers are not for show the post was outputting them because of the cut conditions you are doing required them. The fact your control can only go up to what you posted means you could see some problems in some of your toolpaths.

 

HTH(Hope That Helps)

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