Re: Better servo performance: Ameteks at 60V, 80V ?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Kim Lux <lux@d...> wrote:
Hello Kim,

I'm in the process of retrofitting a bridgeport boss 5 mill
and have purchsed some ametek motors that are rated at 40 volts
also. I was wondering if you could tell me what size machine that
you have your Ametek motors mounted on? I need to find out what gear
reduction i need, if any for my machine? and if i remember correctly
these motors have a 2000 count encoder on them,i was told that
by using a 1000 count encoder that the overall r.p.m.'s of
the motors would increase. I'm not to that point yet but looks like
you are. Any info would be greatly appreciated.

Thanks
Jeff


> High people.
>
> We've got Ametek servo motors on some of our CNC equipment.
Everything
> work well, but we are limited to 150 IPM. We'd like our rapid
speeds to
> be faster, something closer to 400 IPM.
>
> Does anyone know of servo motors with about 600 OZ In torque
(peak),
> reasonable size and a top speed of about 2000 RPM, with a
reasonable
> price tag ?
>
> There is nothing wrong with the Ameteks except that they are only
rated
> for 900 RPM with a 40 Volt supply. I'm wondering how they would
run
> with a 60 or 80V supply. Right now they run cool all the time,
whether
> running fast or slow, even under heavy cuts. We have plenty of
cutting
> power.
>
> The only problem we have is that at high rapid speeds (motor RPM
800+)
> they run out of power, probably due to the fact that their no load
speed
> is 900 RPM from a 40 V supply. If we ran them from a 60V supply,
we
> could probably get 1350 RPM or 225IPM and 80V would yield 300 IPM
or so,
> which would be a big step in the right direction.
>
> Has anyone tried this ?
>
> BTW: setup is Ameteks, 5 TPI ballscrews, Gecko 320s, 40V supply,
direct
> drive, ie no belt reduction.
>
>
> Thanks
>
> --
> Kim Lux <lux@d...>