Re: So, let me get this straight....
With the proper hardware/software, mach3 can be used to control
There are some Digital to Analog converters out there that convert
step/direction to analog and have encoder inputs that close the servo
loop on the board, but I haven't tried them. I also haven't heard
too many good things about this approach.
However, Mach3 is compatible with Galil controller cards (like the
1840), so a PC with a Galil card can be used to control the servo
loop to all the axes, then Mach3 sends commands to the Galil card.
I've talked with Brian Barker (he's a member of a CNC group I've
started here in southern NH) and he has done installations using
Mach3 with a Galil card. All that is needed is a .dll plug-in in
Mach3 to communicate with the Galil board.
I'm still running my converted V2XT with 42 frame steppers and Mach3
as I have 2 million other projects at the moment, but I have all of
the parts already for a Mach3/Galil setup. I spend an hour here and
there installing software or wiring the drives on a bench, but it's
definetly not the top priority. I haven't missed a step since I
converted it a couple years ago, which pushes it down the list even
farther. Also, once I do convert the machine, I will not be using
the original brush servo motors, as I have brushless motors & drives,
but the input to the drives is the same ±10vdc.
I hope this helps.
--- In firstname.lastname@example.org, <nccams@...> wrote:
> Theoretically, it may be possible, practically it is not.
> Most of the V2XT's, both FMDC and BMDC based used analog
> +/-10volt signal servo amps. MACH only works with step &
> direction amps. Big difference in integrating them.
> I contacted MACH directly as I wanted to go from a BMDC in
> my EzTrak (BMDC based system) and MACH replied that their
> system could NOT be integrated with analog servo amps.
> Besides, both FMDC and BMDC are true "feedback based"
> systems and need it to close the loop in servo control.
> There have been attemts to feed the S/D signals of MACH
> into D/A converter of some sort to create an analog control
> signal. Even if this were possible, you lose the encoder
> feec back loop - I dunno if this is practical or possible,
> especially since MACH only relies on step/direction(S/D)
> direction and speed and motion control. I do not believe it
> is encoder interfaceable at this time nor will it be in the
> Good luck
> On Mon, 04 Feb 2008 19:39:09 -0000
> "lefeverluke" <lefeverluke@...> wrote:
> > If a person would get frustrated with trying to make a
> > V2XT work with the existing circuit
> > board and software- hypothetically speaking, one could
> > keep the servos and encoders, but
> > control them with a Windows PC running Mach 3, and
> > control the servos through Geckos, and
> > control the spindle through a break-out board?
> > Do I have that correct? It's what I've been able to
> > glean from surfing cnczone.com,
> > practicalmachinist.com and here.
> > I'm not sure that this is the route I want to go- I'm
> > mostly asking just for my own education.
> > Thanks, Luke
> > Yahoo! Groups Links