Re: [CAD_CAM_EDM_DRO] Re: servo products co. of Pasadena, CA

Hi again Ed
No, there is no special card in the computer. I have enquired from Servo
regarding upgrading from a 486 (which mine has ) to a P133 Compac and have
been told the only thing is to ensure I have a 9 bit addressing scheme in
the serial port.
I am assured by the Computer tech in charge where I work that this is no
problem and he is organising a serial card for me.

This is what Servo told me.
" Be aware that some serial ports on the PC's have a problem with our
software, some are too slow to work properly. We use a 9 bit addressing
scheme which is non standard. All UMC uarts and National 16450 style uarts
seem to work ok. Winbond uarts seem to have at least intermittant problems
if they work at all and of course the older 8250 uarts do not work."

If you have the manuals you will find a setup procedure which will describe
for you how to startup . I think you should be able to connect everything up
and do this .
Just be sure that you tie the motors down to something as when they start
their will be some starting inertia which will throw them around a bit if
they are not restrained.

The motors only have 3 windings and a large encoder disc with two optical
sensors and a small data transmission board , one of these sensors was
causing one of my problems when I bought the machine . It is a HEDS 9000
sensor as has been referred to several times in these posts . I replaced
this and did the setup with an led jig I made up to Servo's instructions and
finally had the z-axis working .
Be very careful if you open the encoder end of the motor and never take the
actual endbells of the motor off. There is an end cover at the drive end
which covers the encoder area which may be removed , actually it has to be
to mount the motor on the machine . You will find a diaphragm type flexible
coupling in there.

The tool maker I bought the machine from used the system for about 6 years
and did some serious work with it, and seemed quite happy with it . It was
only towards the last that I think the problems occurred which I suspect was
from mains power surge problems . There were a couple of FETs blown and chip
that I replaced.All quite cheap parts but I needed the help from Servo to
find them.

The manual describes the backlash setup and tells you to jog in 0.0001 steps
which seems to do OK so I think it will be good enough for me.
The motors are pretty grunty , on the cover of the manual the picture shows
them driving the knee direct drive and that always seems the heaviest
movement I make on a mill (obviously)
My z -axis is fitted to the quill though, as I said in an earlier post.
Sounds like you may have a good deal if the price was right.
Regards
Graeme
Kiwi from 'down under'

----- Original Message -----
From: "Jon Elson" <jmelson@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Friday, May 18, 2001 5:21 PM
Subject: Re: [CAD_CAM_EDM_DRO] Re: servo products co. of Pasadena, CA


> blueveil@... wrote:
>
> > > Do you really have the full system? Does the 'pendant' have
> > the
> > > entire CNC control and servo amps, or is it just the CPU and
> > display,
> > > or just the display?
> > >
> > > Without the servo amps and power supply, you may have to
> > buy these,
> > > and hope they are compatible with the control.
> > >
> > > Jon
> >
> > Jon, Thanks for responding. I have 3 motors, a pendant, a giant
> > black box with 3 driver boards and power supply inside, quick n
> > easy cam software with dongle and programmable disk
> > software for the pc, pendant dongle, two user manuals, and
> > misc utility disks for ibm pc. I don't have the original display, but I
> > think it was just a 386/486 computer running dos mounted on a
> > stand.
> > I can't find to much info on these guys on the web. I am going to
> > see if the motors run first, taking it step by step. It looks like it
> > was just rebuilt or is new, very clean. Are you familiar with this
> > system?
>
> Besides the "big guys" like Allen-Bradley, Fanuc, Siemens, etc.
> who sold $50,000 to $250,000 CNC controls, there were a bunch of
> smaller outfits, like Bandit, Acro and such. many of them are out of
> business, a few were good enough that they were bought out by one
> of the big boys, just to get their product off the market. Unfortunately,
> that means that parts, manuals, etc. for these units are anywhere from
> hard to come by to absolutely impossible.
>
> OK, so it sounds like this was a provide your own PC, and hook it to the
> control box. You'd better check if there is some special interface board
> that went in the PC. If you need that and don't have it, you could have a
big
> mess. If the servo amps are relatively standard, you could replace the
> control with EMC or one of the others that handles servos, and keep the
> servo amps.
>
> Not trying to rain on your parade, but it is best to find out if there is
something
> major missing before you go too far with it.
>
> Jon
>
>
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