I'm considering a cnc conversion of my Grizzly, G0602. I have noticed that after conversion. some folks operate the machine without a compound. Is this a common practice and what are the pros and cons.
There is no use for a compound on a CNC lathe. The controller runs both the X and Y axis. Now if you are gonna set the lathe up for manual functionality having the compound may still be a good idea. But you are gonna need to make sure that it's put in the same spot every time for use with the CNC function. The CNC controller is not going to know where the tool bit is if you move the compound and therefore the tool bit.
Wouldn't think it would matter. First off, what amount of temp change would the block be subject to? Thermal expansion is figured in degree of change times a constant for the metal involved, Steel is .0000066, Aluminum is .00001 One inch thick aluminum would expand .0001 for every ten degrees of change, steel, .000066 for the same. The block of steel/aluminum on the top of the crossfeed isn't going to change all that much.