Just like the topic says, I sometimes like to use the JOG button to turn, face or bore soft jaws manually on a Mori Seiki SL25 with Fanuc 15t control, but on our Daewoo 400L with Fanuc 21 control the minimum feedrate appears to be about 3.94 IPM, that is usually way too fast unless the chuck is turning 600-1000 RPM, is there a parameter or other method that can reduce this?

If you page thru your parameters to "parameters relating to feedrate" you will find a jog feedrate parameter. it is probably set to 1000 MMPM right now. 10% = 3.94 IPM. if you change the param to 500 MM PM your minimum will be cut in half. Be aware your max will be cut in half also. this only effects jog mode so rapid and program feedrates will remain unaffected.

Thanks, I'll look into that.