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

What does VFD mean?

As for how the big boys do tool changes, the whole thing is basically
mechanical with the travel of the various components physically limite to
stop at various point. I know this because I once (before I "retired") had
to design
a system for Caterpillar Tractor company the moved and rotated parts (rather
than tools) for machining purposes.
The elecronics required for tool changes (or moving/rotating parts) does not
require the use of any CNC components. It does require a signal to get the
system started tho'. For a home shop or hobby environment, this signal
could be provided by a manual pushbutton operated during a pause in the
G-code. After tool changes are done, simply hit the "go" (or "continue")
button for the CNC unit.

Smoke

-----Original Message-----
From: Carlos Guillermo <carlos@...>
To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
Date: Monday, December 11, 2000 7:15 AM
Subject: 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
>
>
>
>Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the

discussion of shop built systems, for CAD, CAM, EDM, and DRO.

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