On Tue, Aug 10, 2010 at 07:53:48PM -0700, Neil Baylis wrote:
> Chris,
>
> would you care to hazard a guess at how much phase shift you see from the
> 7i48 input to the velocity input at the servo amp?
I tried to measure the delay in this setup. I scoped the real
tachometer (which is now hooked t
On Wed, Aug 11, 2010 at 07:47:21AM -0700, dave wrote:
>
> Hi Chris,
> Indeed that is exciting. Far better results than I would have expected.
> I wonder if decreasing the servo cycle would decrease the following
> error? Not that 0.0005 on acceleration is bad. That is about 13 counts
> at the mo
On Tue, 2010-08-10 at 22:19 -0500, Chris Radek wrote:
> On Tue, Aug 10, 2010 at 07:53:48PM -0700, Neil Baylis wrote:
>
> > would you care to hazard a guess at how much phase shift you see from the
> > 7i48 input to the velocity input at the servo amp?
>
> There's at least a millisecond delay betw
On Tue, Aug 10, 2010 at 07:53:48PM -0700, Neil Baylis wrote:
> would you care to hazard a guess at how much phase shift you see from the
> 7i48 input to the velocity input at the servo amp?
There's at least a millisecond delay between the motion and the amp
seeing the corresponding tach signal, b
Chris,
would you care to hazard a guess at how much phase shift you see from the
7i48 input to the velocity input at the servo amp?
Neil
On Tue, Aug 10, 2010 at 7:19 PM, Chris Radek wrote:
> Hi all,
>
> I have a VMC with low inertia servos and 25 amp 270 volt velocity mode
> servo amps. It ha
