Kirk Wallace wrote: > Hello all, > > I have a Hardinge HNC which I am thinking about converting to EMC. It > was working very well for the previous owner, so I am concerned about > making sure that if I make the conversion, that it works just as well or > better, in order to justify the conversion. Does anyone have any > experience with EMC with the HNC that they would like to share? Should I > consider using the existing resolvers as opposed to replacing with > encoders? You want to talk with Ray Henry, as he and Matt Shaver did one of these machines, but he changed the resolvers to encoders, and found it to be pretty easy. The resolvers are servo flange mount, so just get an encoder with the same mounting flange, and your are set. If the encoder doesn't have the same shaft size, then you will need to change the shaft coupling or adapt with a ring. The PLC feature of EMC should be able to handle the turret, > the two speed spindle, collet closer, bar feed, parting attachment, > coolant, and lube system. I am planning to remove the variable pulley > drive and use a VFD with the existing two speed clutch system instead. I > believe the servo drives have +-10V analog input so Jon's PPMC would be > appropriate? You could use the PPMC if your servo amps are in good shape. Ray and Matt used my PWM controller and my PWM servo amps, and thought it performed well. Apparently, the turret position feedback is a three bit > binary value, so I will need a binary data input somewhere. Anything > else I need to consider?
If you can get the hal files from Ray or Matt, it will speed you on your way. I think Ray spent a lot of time getting the tool change to work right. Because of the number of I/Os needed to control the turret and the rest of the machine, he used an additional I/O card to the PWM controller. I think they are made in England, I can't remember the maker. Jon ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
