I have a BP Series 1 knee mill with an Anilam 3 axis CNC conversion and a Kwik Switch spindle on it that now runs with LinuxCNC. I have a GS2-23PO 3hp AC drive for the spindle. I recently added a 2500 line encoder to the spindle and can now rigid tap.
http://www.automationdirect.com/adc/Shopping/Catalog/Drives/GS2_%28115_-z-_230_-z-_460_-z-_575_VAC_V-z-Hz_Control%29/GS2_Drive_Units_%28115_-z-_230_-z-_460_-z-_575_VAC%29/GS2-23P0 Right now I have the original 1 1/2 hp BP motor and the vari-speed head on it. So I've been running it at 1800 RPM and using the vari-speed to change spindle RPM which can be a bit of a pain when swapping back and forth from drilling to tapping. The thought came to me yesterday after remembering my buddy had one of his BP's converted to a timing belt drive and a VFD for speed control. I found a 2 hp 3600 RPM inverter duty motor for $440 at automation direct. http://www.automationdirect.com/adc/Shopping/Catalog/Motors/AC_Motors_-_General_Purpose_and_Inverter_Duty_%280.25_-_300HP%29/AC_Motors_-_Inverter_Duty,_Marathon_%280.25_-_100HP%29/Marathon_Inverter_Duty_Motors_%28by_HP%29/E2006 The specs say the motor will run from 350 RPM to 7200 RPM. If I gear it at 1.4:1 I can get 250 RPM to 5142 RPM which the spindle should do as it can do 4200 RPM now. I can tap at 250 RPM and do that now. Have I missed anything? Is this a bad plan? Thanks JT ------------------------------------------------------------------------------ Introducing Performance Central, a new site from SourceForge and AppDynamics. Performance Central is your source for news, insights, analysis and resources for efficient Application Performance Management. Visit us today! http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
