Re: EMC with STEPPING_TYPE = 3

I have just recently been running emc. I am using step and
direction drives but in the proccess of learning about freqmod I
found a lot of info. Looks like type 3 is a 4 phase output. type 2
they call a table driven stepper - maybe that is what you need.
Come up with your own phase table. Don't ask me how that works as I
have not found any info on it.

sam

http://emc.sourceforge.net/NIST-archive/msg05936.html


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "martindunschen"
<zabaione@u...> wrote:

>
> Hi
>
> I had posted before, looking for advice on how to configure EMC

with a

> German made stepper drive, called SMC 1500.
>
> I am now at a stage where I get some kind of a response from the

motors:

> I use
> ...
> EMCMOT = freqmod
> STEPPING_TYPE = 3
> ...
>
> I cant find much useable documentation on this setting of
> STEPPING_TYPE = 3.
>
> My interpretation is this. The driver card I use is just some kind

of

> an amplifier, it does not process clock/direction signals, but

needs

> the waveforms send out to energize the motor coils. The setting "3"
> for STEPPING_TYPE does that. Does that make any sense?
>
> Now, with these settings the motors make a lot of noise and tick

back

> and forth. When I then jog the motors, the noise just changes.
>
> My assumption is that I now have to calibrate the software to the
> motors/drive. This means fiddling with P, I, D and further

parameters.

> But I dont have the slightest clue where to start, or a method I

could

> use. When I change the P it seems to have an influence: The

rattling

> noise the motors make changes. But no idea what I am aiming for.
>
> Does anybody out there use a similar setting, and can post some

hints

> on how to proceed?
>
> (I also have a DOS programme (PC-NC) that operates the motors very
> smoothly through the same driver card, and I would assume that EMC

and

> Linux would be capable of the same, or not?)
>
>
> Martin
>