Re: [CAD_CAM_EDM_DRO] 20 Amp 80 V $99 DC Servodrive

Mariss Freimanis wrote:

>
> Hi,
>
> This is a shameless cheap advertising ploy. I got my servodrive
> prototype boards (48) from the PCB fabricators and they work great
> after I fixed my numbskull mistakes on them.

......

I have a couple questions here, and maybe they are of general interest
so I will post them to the list.

First, exactly what are you offering here? a pc board 'kit' or a fully
populated module ready to run?

With this board what else do I need to move a servo motor- Obviously I
need a motor, of less current draw than the board spec. I assume the
motor needs an encoder wheel of some kind? does it need a tach winding?
any kind of encoder board needed?

If I hooked up a couple of these directly in place of the step and
direction stepper board I have now would that be a fully functional
system?

What do I loose in running a servo in step and dir mode? I recall a note
here a while back knocking the JR Kerr PicServo in that mode as being to
slow. Is that true here, or what magic does your board do to prevent it?

For motor selection I see lots of DC motors that look about the right
size and current draw in surplus sources. How would I choose one of
these to run with this board? What if I wanted a small motor, maybe only
1-2 amps?

Sop far all my CNC tinkering has been done with steppers because I know
how to use them, Id like to try a servo ssytem but have always been
turned off by the complexity of it all. I hope this board is an answer.

ron