RE: [CAD_CAM_EDM_DRO] HIP4081 was Re:Re:Black box/kerr

Hi Andrew -

Could you tell us a little more about your spindle drive project?
I don't remember to much discussion here about that, except for
VFDs. I'm working on putting together a spindle system, and I'm
trying to figure out how much position control/resolution is
needed for toolchanges and rigid tapping. Yes, I realize these
are totally different monsters. Any idea how the big boys do it?

Carlos Guillermo
VERVE Engineering & Design


-----Original Message-----
From: andrew abken [mailto:kn6za@...]
Sent: Monday, December 11, 2000 4:06 AM
To: CAD_CAM_EDM_DRO@egroups.com
Subject: Re: [CAD_CAM_EDM_DRO] HIP4081 was Re:Re:Black box/kerr


Hello,

No I did not do anything special, I lost lots of mosfets to find
out that
I can get no where near the promised upper limit of 80 volts. As
long as I
stay down at 30 volts all is cool. If I had it to do over again I
would
never use this chip again. I am building a spindle drive, 100
volts 15 amps,
that will be under pic servo control, but it will use the ir2104.
So far I
have not had any problems in my limited testing.


I admit it was a bad choice, and one I would love to change, but
as long
as I stick with my 24 volt servos I will continue to use the
drives.


Andrew Abken