Re: Servo/Spindle motor ammeters?

Sorry, use this link: That one won't be good for long it it still is.

http://newark.com/NewarkWebCommerce/newark/en_US/endecaSearch/partDetail.jsp?SKU=01K5532

On 7/12/06, Dennis Schmitz <denschmitz@...> wrote:
> Don't do that, open up the drive and find the current sense resistor
> and hook one of these across it:
> http://newark.com/NewarkWebCommerce/newark/en_US/endecaSearch/partDetail.jsp;jsessionid=ZSKL32AMIEABSCXDUY2SFGIK2OTCIIV1?SKU=01K5532&N=0
>
> In geckos, they're connected to the low-side driver and are 0.025 ohm,
> making the display fullscale at 8 amps.
>
> Or if you're really anal about not calculating that 2.5 is really 1,
> you could divide the sense resistor voltage by 2.5 and get a 1:1
> correspondence to the digits, and a 20 amp full scale.
>
> On 7/12/06, Abby Katt <cncgroupnospam@...> wrote:
> > Hi Guys,
> >
> > Just searched my archives of the list and found no direct references to
> > this, so thought I would post here as it seems a pretty obvious question
> > (though I suspect my range of answers will surprise me, as usual, about
> > how obvious items are rarely so - especially in CNC!)
> >
> > I was at the Mach 2006 expo and saw a lot of the "real-thing" CNC mills,
> > personally I thought Mach3 looked way better than many of them (don't
> > flame me! :), but I did notice a feature standard to just about every
> > mill and not on the average hobbiest CNC. They had load bar-graphs for
> > the spindle motor, and the servo motors.
> >
> > I want load-meters for my mill! :)
> >
> > So I was wondering, can I just get away with 3 DC ammeters placed
> > between the power of each servo driver, and one AC ammeter in series
> > with my (AC) spindle? How reliable is this, or does it really not
> > indicate anything other than looking cool (in which case I'll probably
> > do it anyway...)
> >
> > Abby
> > (http://www.silverkatt.co.uk)
> >
> >
> >
> >
> >
> >
> >
>