I think it really depends on the VFD.
Some Siemens VFDs can have multiple stop inputs so you can setup a
normal stop and then a emergency stop and more.
Dave
On 12/7/2010 2:15 PM, robert wrote:
>
>> Why don't they have VFDs with adaptive stopping cycle, so that they
>> reduce the frequency
> Why don't they have VFDs with adaptive stopping cycle, so that they
> reduce the frequency to maintain high bus voltage (to be dumped into
> the brake resistor), adaptively, as opposed to mindlessly doing it on
> a predetermined linear scale?
>
> i
>
>
i dont know if this is a function in highe
On Mon, 6 Dec 2010 16:13:15 -0600, you wrote:
>I have used many VFDs, but in all of them the stopping time is
>programmed in terms of seconds.
>
>This does not translate well into operating machine tools with
>multiple speeds. On such tools, slowly rotating spindle can be stopped
>quickly and more
On Mon, 2010-12-06 at 16:13 -0600, Igor Chudov wrote:
... snip
> Why don't they have VFDs with adaptive stopping cycle, so that they
> reduce the frequency to maintain high bus voltage (to be dumped into
> the brake resistor), adaptively, as opposed to mindlessly doing it on
> a predetermined linea
I have used many VFDs, but in all of them the stopping time is
programmed in terms of seconds.
This does not translate well into operating machine tools with
multiple speeds. On such tools, slowly rotating spindle can be stopped
quickly and more time is needed to stop a fast rotating spindle. If
f
