Re: Replacing Anilam Controller with EMC?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Matt Shaver <mshaver@e...>
wrote:

> On Saturday 20 December 2003 00:05, another_roger wrote:
> >For
> > position feedback, it uses linear encoders mounted directly to the
> > axis.
>
> I hope there is no backlash (or flexability) between the motor

shaft, drive

> belts, leadscrews (ballscrews I hope), nuts, and mounting hardware.

I suspect

> that if your present setup worked that you are OK in this respect.

The servo's are set up in a velocity loop between the drive and motor
with tach feedback. I had a good bit of backlash when I first got
the mill, the motors would run a speed proportional to the error. If
there was a 0.0005" error, the motor would run at a slow constant
speed the other direction and wouldn't stop until the error was
removed. I'm guessing that the analog output of the controller
should consist of a velocity command minus the error. Perhaps I
could set I and D gains to zero. Does EMC support velocity
FeedForward?

> You may also need some solid state relays like Opto22 or Grayhill

makes to

> interface the PC's digital I/O to your spindle & coolant relays.

I would want to add those in the future, the Anilam control has no
I/O except for the limit switches. To turn the spindle on, I press a
button (forware, reverse) that latches in the motor starter. I
currently open a needle valve to turn on my mist coolant system.

> > Has anyone here set up a similar system? How difficult will it

be to

> > get the software configured properly?
>
> Well, it can be done because I have done four of them so far. I

have replaced

> two Bridgeport E3 controls, a Sharnoa control on a Wells-Index and

a Delta 10

> (or 20, I forget) on a Kondia.
>
> If you unbelt the servos and your spindle forward/reverse relays

are

> mechanically interlocked (probably), then there's little harm you

can do

> while experimenting with getting the emc.ini file configured for

your

> machine. That said, it can be somewhat vexing to get all the

numerous

> parameters correct. I'd plan on it taking you at least a few hours,

maybe a

> day (for the configuration part, the retrofitting part can take

seemingly

> forever... There are a LOT of wires, although your situation is

eased

> considerably since you already have a power supply and amps already

wired. If

> you're lucky and have a schematic of what's there, you may be able

to do the

> wiring in a week of spare time).

I figure if I wire to mating connectors that are used on the current
control, I can experiment and re-connect the Anilam control until I
get it working right. One of the main things I'm unsure of it how to
compile EMC with the STG2 file. The other is how to configure EMC to
work with my hardware, mostly the linear encoders. I'll have to find
out the true resolution of the encoders, I think they have 2540
counts per inch, though it only uses 2000 counts per inch in inch
mode (.01mm in Metric).

> Here's a web page for you:
>
> http://users.erols.com/mshaver/v2e3.htm
>
> > Thanks!
>
> Good Luck!
>
> Matt
>
> P.S. If you live near Baltimore, I can come take a look.

Is Southern Illinois close enough? Come on over :-)

I plan to start saving $$$ for the STG board and getting the mating
connectors for the 3 scales and the control. I'll also try to get
the pinouts for the scales from Anilam, I think I have the control
interface schematic already.