Re: Digest Number 15

"Dan Mauch" <dmauch@...> wrote:
Subject: CNC Software

The servo system requires encoders for feed back. The comparison between the
ordered desination and the actual location is taken care of in the
electronics.
The servo system works fine with desknc, maxnc,dancam and other step and
direction software.

[Evidently you are using some special hardware. I just asked, and while
they're working on it, MaxNC isn't recommending their software to run
servos. Apparently until they fix something, the machine booting in Windows
fries the motors. But I'll keep you posted with their progress in resolving
this problem.]

It works good on my .000 backlash chinese knee mill. On
my mill drill it also works fine now trhat I added ballscrews to the X and Y
axis. The z axis has .02 backlash. thus at 24,000 counts to the inch
1/24000=.000041667 " per count there for .02/.000041677=479 step in backlash
that I would have to add in the max pr file. It will only go to ~256. So
that has forced me to fix the damn quill problem.
I called otto about 4 times on the file size. On the 4 axis version he said
it could not be fixed. I don't need the three axis version.
Dan

[I just talked to Otto (president of MaxNC) about this, and he says the
unlimited filesize program for running all 4 axes is there, in the current
DLX version of the software. Apparently, you need to choose "DNC" as a menu
item. This turns off tool radius compensation, but everything else is
supposed to work, with a "lookback" routine reading the file off the
harddrive instead of trying to store it all in memory. If you could try
this and let us know how it works, I'd appreciate it. Apparently I have a
transitional version of the software which bundled this function into the
MaxL program (and it seemed to work fine), but it is a bit different now.]

Andrew Werby

-----Original Message-----
From: Andrew Werby <drewid@...>
To: CAD_CAM_EDM_DRO@onelist.com <CAD_CAM_EDM_DRO@onelist.com>
Date: Tuesday, May 18, 1999 9:52 AM
Subject: Re: [CAD_CAM_EDM_DRO] Digest Number 13

>From: Andrew Werby <drewid@...>
>
> "Dan Mauch" <dmauch@...> wrote:
>
>I tried using maxnc on a Shoptask with a servo system. Since the shoptask
>had .015 backlash and the servo system has 24000 counts to the inch the
>maximum number that could be put into the backlash comp field was 255
>counts.I needed to put 285 as I recall.
>
>[I didn't know MaxNC's system supported servos at all. Don't they require a
>feedback loop? Or is this taken care of in the amplifier circuitry? If I've
>got a machine with ballscrews (and hence less backlash), do you think I can
>use the MaxNC parallel port control system? That would certainly be
>cheaper than the other alternatives I'm looking at, and besides I'm used to
>it.]
>
>When did they fix the file size problem. As of January it was still there

on

>the 4 axis delux version that I got.
>Dan
>
>[You need to use the "MaxL" program, which runs in DOS, not MaxPro. It's
>been out for about a year, although their explanations of their various
>programs could be a lot clearer. They will send it to you if you bother
>them enough by phone (don't expect them to reply to e-mail, though.)]
>
>Andrew Werby

Andrew Werby - United Artworks
Sculpture, Jewelry, and Other Art Stuff
http://unitedartworks.com