I am using NCstudio version 5.5.60 and cannot find a way to get the software to slow the spindle to less than 6000rpm. I can set a spindle speed of (say) 500rpm in a Gcode file and the NCstudio screen will display this when the file is run. I can also set a speed of 500rpm manually in the input box on the NCstudio screen and the software will accept it. In both cases the actual spindle speed is always 6000rpm. I cannot find anywhere in NCstudio to set a minimum spindle speed (there is a setting for maximum). I have searche dthe manual that I have and as many on-line links as I can find, but without success. Is a minimum speed of 6000rpm hard coded into NCstudio? Or is there a "hidden" way to change this? Help with this would be very much appreciated because I want to use an edge finder that requires a spindle speed of 500rpm.