Homebrew PCBs

Phil wrote:
> --- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan"
> <stefan_trethan@g...> wrote:
> ... 
> 
>>DC servos are not the answer to a simple drilling machine for sure,
> 
> as the  
> 
>>controllers are unnecessary complicated.
>>But we all have our opinions.
> 
> 
> While I'm reluctant to recommend servos for cost reasons, I think they
> can be done at about the same complexity level provided one is
> conversant with microcontroller design and programming.  They are more
> reliable as open loop steppers can miss steps in some circumstances
> and the encoder always tells you where you are.

Agreed.  I was assuming we are talking about
"midnight engineering" here rather than looking
for a $ervo motor off the shelf.  I'd expect the
lab-built "digital motor" approach to be less
than the cost of a roughly equivalent stepper
solution as viewed by total system cost.

-- 
uhmgawa@...        www.gnu.org