Re: Fanuc 6m help

My spindle drive was shot, so I don't have to worry about interfacing
to it :-). My mill uses a 180V armature 200volt field 5HP DC brush
motor for the spindle, so I bought a KBRG-255 5HP 4 quadrant
regenerative drive from KB. About $350. It has a +/-10V input
signal, and also manual pots for speed and torque control. Right now
I am just using EMC to turn the spindle on and off and reverse
direction. I need to interface to the +/-10V signal without buying a
servo to go card.

Your fanuc 5 motors are 90V 12 amp, with 2500 count encoders (I
think). The gecko g340 will run them at 80V, which should be plenty
of torque. With the high encoder count, you set the gain and damp
pots almost fully counterclockwise (minimum setting). I think there
is a market for used Fanuc parts, since the three translation chips
on the motherboard cost $330 each alone. I saw a 6MB motherboard
with a few other boards (BMU, Punch tape) go for over $1000.

Do you have three phase available? One nice thing about my
conversion is that everything runs off of single phase 220V now,
except for the spindle lube pump, which is a small 3 phase motor. I
bought a small VFD on ebay for it that runs on single phase (have not
gotten it yet). Since I didn't have single phase, it is nice not to
have to use the noisy, power consuming 7.5hp rotary phase converter I
built.

Richard

--- In CAD_CAM_EDM_DRO@y..., "gorton22" <ksmath@b...> wrote:
> > Richard: I have a 6MB with fanuc 5 motors. I did not mention that
it
> also has a fanuc spindle drive and 5hp motor. What do you use to get
> the signal for the spindle drive? Have you had much trouble with
> tuning? How do you like EMC? I was planning to use the brain dead
> install.I will have plenty of questions and will keep you posted. Is
> there a market for used fanuc parts? The last board I had repaird
cost
> 350.00 don't wnat to do that again. Thanks to every one who replied
so
> far. Don B
> --- In CAD_CAM_EDM_DRO@y..., Rick E <skykotechnologies@y...> wrote:
> > Hi Don,
> > I am doing the exact same thing. I bought a Shizuoka cnc bed mill
> with a fanuc 6MB (is yours a 6MB or 6MA?). My motherboard was
missing
> a y axis translation IC (the 42 pin gold colored ICs in the middle
of
> the motherboard). My motors are fanuc 0 and fanuc 5 dc brush with
> 2500 line encoders. In that reguard, I guess I am lucky. I bought a
> gecko G340 drive (already had two others) and am up and running on
> EMC. Still a lot of work to interface the tool changer, spindle
drive
> and other stuff.
> > I kept my motherboard and drives, but I may sell them when I am
sure
> that everything is going to be ok with EMC.
> > Repairs from fanuc are at least $1250 for them to glance at
> it...over $4 grand for a new motherboard (much more than I paid for
> the whole mill, including delivery)
> > Keep us posted. I am sure we can help you.
> > Richard
> >
> > gorton22 wrote:Hello everyone: My name is Don Blausey and I
joined
> the group
> > recently.
> > I have a gorton mill with a fanuc 6m control on it. I have used
this
> > mill for the past few years in my home shop. While using it a few
> > weeks ago the control died as it has frequently in the past year.
I
> > would like
> > to save the drives and the motors and install a new control. I
know
> > that
> > I will have to change the resolver to encoders. I have learned
that
> > from the many web sites I have viewed in the past few weeks. I
have
> > been following this site and am not sure if I am in the right
place.
> > This machine has a 10" x 50" table on it, and most of the post are
> for
> > table top machines. I have checked out camsoft and a few others
and
> > not ready to spend that on this machine. Repairs on old boards are
> not
> > cheap either. Has any one else done this or have a sugestion on
what
> > to do. Any help greatly appreciated.
> >
> >
> >
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