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