RE: [CAD_CAM_EDM_DRO] High Voltage servo cards

Hi Harko

Which ones are more reliable?



I have resistors on the outputs, but a little more inductance would give the
card something to work with and slow those transients that can blow the fets
when it's pushed to a limit.,

as long as the backemf current through the FET diodes doesn't rise too much.
The present motors though are 8.1mH which is quite hi for a servo.





Dr. Mark Vaughan Ph'D. B.Eng. M0VAU

Managing Director

Vaughan Industries Ltd, reg in UK no 2561068

Water Care Technology Ltd, reg in UK no 4129351

Addr Unit3, Sydney House, Blackwater, Truro, Cornwall, TR4 8HH, UK.
Phone/Fax 44 1872 561288

RSGB DRM111(Cornwall)

_____

From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Harko Schwartz
Sent: 01 April 2007 16:10
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] High Voltage servo cards



use inductors on the output of the drives and it will work better and using
a better grade of drive would also help look at servo dynamics. There
pricing is not bad and they are very reliable.

Harko

On 4/1/07, Mark Vaughan <mark@.... <mailto:mark%40vil.uk.com> com> wrote:
>
> Hi Guys
>
> I'd like to ask what other HIGH VOLTAGE servo cards are some of you are
> using.
>
> I've just lost another Rutex which has gone noisy, grunchy motor control,
> and gaining steps, change the card and it's OK so must be a bad card.
>
> The PID control on the Rutex is brilliant, but they suffer from noise,
> which
> I've just about got a handle on, and seems have a few other weaknesses.
>
> Time I thought about what alternatives there are.
>
> Any suggestion please, good or bad, together with your experiences.
>
> Thanks Mark
>
> Dr. Mark Vaughan Ph'D. B.Eng. M0VAU
>
> Managing Director
>
> Vaughan Industries Ltd, reg in UK no 2561068
>
> Water Care Technology Ltd, reg in UK no 4129351
>
> Addr Unit3, Sydney House, Blackwater, Truro, Cornwall, TR4 8HH, UK.
> Phone/Fax 44 1872 561288
>
> RSGB DRM111(Cornwall)
>
> [Non-text portions of this message have been removed]
>
>
>

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