I've only changed the belt on my Taig a couple times, and every time it's a PITA. I hate the idea of having a computer controlled machine but having to change the belt manually if I want the tool to spin at a different speed... I'm a nerd, I want my computer to do the work.
I get a little long winded at times, so I'll keep this post as short as I can...
(1) If cost was not an issue, would a Keling KL34-170-90 (NEMA 34) motor (w/ encoder), and a Gecko 320/340 make a good replacement for the stock Taig 1/4 hp motor? Motor spec sheet (PDF), other Keling servos
-To me it looks like this servo is a little more powerful than the Taig motor
-It's maximum speed is close to the constant speed of the Taig motor
-I've never used a servo before, and I'd like to experiment a little (I'm a kinesthetic learner)
-I'm planning to get a Taig lathe in the near future - seems like I'd really want a servo on there. If I decide it's overkill for the mill I could move it to the lathe. If I want a servo on both I'll have gained first-hand experience, which is always good.
(2) On a CNC lathe a servo is required to cut threads, right? (3) Would a servo offer any advantages over a normal DC motor when used on a mill? I can't really think of anything myself... tapping comes to mind, but I don't really see doing any rigid tapping (I may be using this term wrong, sorry) on the Taig.
One last question: (4) Since I plan to only use a single pulley ratio between the spindle and the motor should I look into getting a couple timing pulleys to replace the 6-groove Taig pulleys?
Hmmm... That's not too long.