Originally Posted by
David C. Roseman
Roger, sorry, I should have been a bit clearer. When I said "no problems whatever since then", I meant no problems resulted from restoring the pulse width modulation carrier frequency setting to the Delta Electronic factory default value of 15kHz. The lathe shipped from Grizzly with a pr. 71 setting of 9kHz. The only reason I changed the setting in the first place was to get rid of some acoustic motor noise that presented as a high-pitched trill audible at certain rpms. The adjustment completely eliminated it. The trill doesn't affect performance at all. Many folks wouldn't mind it, and some, including two or three of my many friends who have G0766s, don't even notice it.