Re: Best source for Servo's ??

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Les Newell <lesnewell@f...>
wrote:

> Excellent links Erie. Thanks!
>
> Jon Elson posted some specs for the E650 motors on
> <http://www.alltronics.com/motors.htm> here:
> <http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/message/70772>
>
> To give you an idea what to look for, a 20 oz-in motor with a max

speed

> of 2000 rpm will give a continuous thrust of nearly 40 lbs with a

max

> feed of 200 IPM. Peak thrust can be twice that.
>
> Be careful. A lot of the encoders on the motors on the
> http://www.aaaim.com site are pretty useless. You need quadrature
> encoders not hall effect tachos or sine encoders.
>
> Les

We are obvously talking different types of machines. For a plasma
cutter with a 4 ft table, I would expect that something on the order
of 250 inch pounds to move the gantry, but double that for higher
speeds ?

It appears to me that those motors are very light ???

I was assuming that shotting for more than 20 watts was in order ?

What driver would be best ? The Rutex and Geckos shoot for 70 plus
volts and some of the links show 9 volts.... Is there a lower cost
driver that would handle the smaller motors for half the price ?

Dave