Re: [CAD_CAM_EDM_DRO] Re: Max feedrate of ball screws?

----- Original Message -----
From: Chris L <datac@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, December 07, 2002 10:42 PM
Subject: Re: [CAD_CAM_EDM_DRO] Re: Max feedrate of ball screws?


> Alex,
> The Plasma Cutter is a Hypertherm. It plugs into a 30amp 208v outlet.
> The computer/Controller and power supply box are on a typical 15a 110v
> outlet An electric Dryer, Arc welder, or Electric oven would probably
> draw more depending on just how thick of material you are cutting.
>
> A laser is a whole different animal, MUCH cleaner and vey narrow kerfs.
> The Laser also has however a very different cost factor. It's lots more
> to both operate and own. I have been very happy with the finish of the
> edge. One must use a control that has very good continuous motion to
> avoid any "chatter" showing up on the edge. I've been using the Version1
> FlashCut control on it which does an excellent job. I do not have any Z
> axis height control applied, so I need to make sure my plate is level
> before starting. I do have what they call a "machine Torch Head", which
> is the long tip with a rack on it that fits into its own housing. That
> housing has a simple knob to raise and lower. It would be a snap to
> install a motor to this housing, but you need a method to control height
> based on amp draw from the Plasma machine. To my understanding,
> Hypertherm has this output, And I believe Mariss has given us a circuit
> that should work. I just didn't get that far yet !
>
> Because I do not have the best height control, my Kerf can vary in angle
> as it pierces thru the steel. So that can make it tricky to measure.
> However, I have never seen a part go beyond .030" 0r so thou at the
> bottom edge of the cut on 1/8-3/16 steel, and for what I make it does
> not matter. The parts clean up very easily. The machine resolution as I
> recall is .002 and if one just throws a dial on the machine, She stays
> pretty accurate to that, so you can see how much the kerf itself can
> throw things off. Correct height is important if you want really good
cuts.
>
> It's a great tool to have, thats for sure.
>
> Chris L
>
> alex wrote:
>
> >Chris, you mentioned about the plasma cutter.
> >Ever since I saw a laser cutting machine about 14 years ago I wanted to
have
> >something similar. How clean your plasma cutter cuts and how exact?
> >How much electricity does it take?
> >Regards, Alex
> >
> >----- Original Message -----
> >From: Chris L <datac@...>
> >To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> >Sent: Friday, December 06, 2002 8:17 PM
> >Subject: Re: [CAD_CAM_EDM_DRO] Re: Max feedrate of ball screws?
> >
> >
> >
> >
> >>I know this "drifts" a little from "max feedrate of ball screws",
> >>
> >>But, My next homebuilt Router style machine over 36" in any direction,
> >>
> >>
> >will have Rack and Pinion. I've got an Old Digital Tool 6'X10" Router at
the
> >shop to play with. The thing Flat out Flies.
> >
> >
> >>Accuracy can be measured within .005 overall, and if I throw a "short
> >>
> >>
> >throw" dial indicator on it, and make a .002" move via software command,
> >(which is by the way this things current resolution), By
> >
> >
> >>diggidy, That's about what shows up on the Dial.
> >>
> >>This is an old machine, and I have not done anything to try to limit
slop
> >>
> >>
> >or backlash. Lot's can be done to Rack and pinion to gain accuracy, at
least
> >to the point that the manufacturer sells his rack.
> >
> >
> >>I also Built Plasma cutter with Rack. Of course what do you need in
> >>
> >>
> >regards accuracy here ? But it works excellent.
> >
> >
> >>In my book, Ballscrews on a large machine are only necessary If you
> >>
> >>
> >absolutely have to have super duper accuracy. Don't forget, on a large
> >machine, you better have a Floor, or a Laser Leveling System
> >
> >
> >>to get that accuracy over a large area. I'm Liking Rack more and more
> >>
> >>
> >every day for your "Typical" Router. Rack is Cheap, You can "Glue" it on
> >with Loctite 609, and replace it easily if you wear it
> >
> >
> >>out.
> >>
> >>For smaller machines like Engravers, Small Routers Etc. Screws are still
> >>
> >>
> >OK, And a bit more affordable when Short.
> >
> >
> >>Chris L
> >>
> >>
> >>Addresses:
> >>FAQ: http://www.ktmarketing.com/faq.html
> >>FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> >>Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
> >>
> >>Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> >>Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> >>List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...
> >>Moderator: jmelson@... timg@... [Moderator]
> >>URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> >>
> >>OFF Topic POSTS: General Machining
> >>If you wish to post on unlimited OT subjects goto:
> >>
> >>
> >aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it
if
> >you have trouble.
> >
> >
> >>http://www.metalworking.com/news_servers.html
> >>
> >>http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
> >>
> >>
> >sister site to the CCED group, as many of the same members are there, for
OT
> >subjects, that are not allowed on the CCED list.
> >
> >
> >>NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
> >>
> >>
> >DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> >
> >
> >>bill
> >>List Mom
> >>List Owner
> >>
> >>
> >>
> >>Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >>
> >>
> >>
> >
> >
> >Addresses:
> >FAQ: http://www.ktmarketing.com/faq.html
> >FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> >Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
> >
> >Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> >Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> >List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...
> >Moderator: jmelson@... timg@... [Moderator]
> >URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> >
> >OFF Topic POSTS: General Machining
> >If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
you have trouble.
> >http://www.metalworking.com/news_servers.html
> >
> >http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
sister site to the CCED group, as many of the same members are there, for OT
subjects, that are not allowed on the CCED list.
> >
> >NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> >bill
> >List Mom
> >List Owner
> >
> >
> >
> >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
> >
> >
> >
> >
> >
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
>
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...
> Moderator: jmelson@... timg@... [Moderator]
> URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
sister site to the CCED group, as many of the same members are there, for OT
subjects, that are not allowed on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> bill
> List Mom
> List Owner
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>