Hello all, I am sure this one will stretch the memory!! I used to know the specifics, but when you don't use something, well, it kinda goes away! We have a hole position tolerance of .009"TP (True Position). Can anyone tell me how to convert this tolerance into an X-Y location value? Like, based on the zero datum you are allowed a maximum of .003" x .003" off the defined location. Or, you are allowed a maximum of .006" in any direction combination which represents the .009"TP. The only number I am using from actual is the .009"TP. Taking that tolerance and defining the location values allowed is what I am having a tough time finding out. Thanks to anyone who can save me here! Richard Hamilton Clemar Mfg. / Rain Bird [log in to unmask] ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################