Homebrew PCBs

On Sun, 12 Jun 2005 15:28:51 +0200, mycroft2152 <mycroft2152@...>  
wrote:

> Hi robert,
> Hadn't thought of using servos for this, just steppers. But that is
> an interseting idea. For hobby robots, the servos are modified for
> continuous rotation. May just be possible.
> The picaxe has built in servo routines and is programmed in BASIC.
> Should be easy to hook up a couple of servos to the screws to try it
> out.
> Myc


I thing the reference to servos was meant more general, not RC model  
servos.
They often use DC servo motors on larger CNC machines, for faster speeds  
and more power.
There is a severe increase in control circuit complexity (you need  
rotational feedback and a closed loop control).

If you do not need to advantages of servos (power and speed) it is MUCH  
easier to go the well tried route of using steppers.

RC servos would not last very long, in this application, and would not  
move very fast or with any amount of force. They are more expensive than  
steppers with no advantages, so i would not suggest using them.

Now.... you could use a chicken grill motor..... ;-) just joking!


ST