Re: [CAD_CAM_EDM_DRO] Servo questions.

no falloff wrote:

> I was offered a pair of servos yesterday, and I realized that, though I tried to do the research from the FAQ here, and by searching other web pages, I still have absolutely no clue. My goal is to CNC retrofit the small Knee mill I already have ( a clone of a clausing 8200 series), and I've been trying to formulate a game plan. As of now, I'm planning on using servos and not steppers as I like the idea of the better accuracy through the feedback of the servos, as well as the faster rapid mode travel. These motors are DC brushed, 2 wire panasonic servos, with 6 wire encoders, there is no torque rating, however they say 80 Watts on them.

80 W is not a lot, that's about 1/10 Hp. 200 W sounds better for this use.

> What I needed to know is: Are these the type of motors I should be looking for? Are they too big to be driven by Gecko 320s? Is there a general conversion from watts to oz/in?

no, certainly not too big for gecko. No conversion from watts to Oz-In is possible without
knowing the speed that the rating was determined at.

> I've found a bunch of sites that have tutorials on steppers, however nothing really on servos. Anyone have a web site URL for something like this?

See my discussion of this at http://206.19.206.56/Servo.htm there is a link in this
page for servo performance calculations.

Jon