Re: EMC - Servo-To-Go - Analog output

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@p...> wrote:

>
>
> foxprints2003 wrote:
>
> >I need a little more info, such as what axis output is used, how

to

> >set the scaling & direction etc. Do you know where to find this

info?

> >
> >
> Axes are numbered 0-n internally. Usually x is 0, y is 1, z is 2,

and axis

> #3 is not used. There is a line in the .ini file
>
> ; analog out bits
> SPINDLE_ON_INDEX = 3
>
> that defines what DAC channel the spindle speed comes out. I have

not

> been able to get it to move to other DAC channels, but it does

seem to

> work on channel 3.
>
> As for scaling, there are some new parameters that set it

independently for

> each direction. I think the following sets it so it will always

be zero to

> approximately +10 Volts at 10,000 RPM, for either direction. If

both

> numbers are positive, then spindle rotation in the reverse

direction (M04)

> will give a negative voltage. These lines go right below
> the spindle_on_index line shown above.
>
> MIN_VOLTS_PER_RPM = -0.001
> MAX_VOLTS_PER_RPM = 0.001042
>
> The standard servo DACs go from -10 V to +10 V, and the S speed

value

> is just multiplied by one of the above numbers to become voltage.

So,

> 1000 RPM x .001 would be 1 Volt. (The numbers above were copied
> from a .ini file, I suspect they are different to get the right

calibration

> for a particular motor drive.)
>
> The info on this can mostly be found by reading the code, which is

a

> daunting
> task even for me. Hopefully, the documentation will catch up.
>
> Jon

Thanks,
I set it up in the ini file & it didn't crash but I don't have the
means to test the output right now. It really won't help anyway
because the interpreter handles an "S" code the same as an "M" code,
motion stops before executing.
Matt Shaver replied yesterday that the problem of pausing motion
moves had come up before & hopefully he knows of a fix.
Thanks,
Dean