Re: mini-mill converson data kit ?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jim Brown <jagco1998@y...>
wrote:

> For the record ....I used NEMA 34 steppers on my Grizzly mini mill

and have had zero problems with thier weight on the x axis in the
last 8 months or so.


What was the rating of the steppers ?
single or double stack ?


I have some single stack 150's and am wondering if they are OK for
use on the mini-mill.

Dave

>
>
>
> Regards,
>
> Jim
>
>
> shawnusa2002 <shawnusa@e...> wrote:
> I'm highly interested in the conversion kit for the z and future XY
> axis. Do you have photos of the prototype? When will you be ready

to

> start supplying?
>
> Thanks
>
> Shawn
>
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "kdntool"
> wrote:
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude"
> > wrote:
> > > --- In CAD_CAM_EDM_DRO@yahoogroups.com, ccq@x wrote:
> > > > On Mon Jun 30 04:03:49 2003 kdntool wrote:
> > > > >
> > > > >--- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude"
> > > > > wrote:
> > > > >> Hi,
> > > > >>
> > > > >> I am looking for data on converting a mini-mill to

steppers.

> > > > >>
> > > > >> can anyone offer some links ? or recomendations on stepper
> > > sizes ?
> > > > >>
> > > > >> I was thinking of starting with some NEM34's 150 in-oz
> because
> > I
> > > > >have
> > > > >> them and could always swap out for larger units.
> > > > >>
> > > > >> Also, what is the best way to automate the Z axis ?
> > > > >>
> > > > >> Dave
> > > > >
> > > > >Dave,
> > > > >I just finished the conversion on a "Grizzly" type with the

R-

> 8
> > > > >spindle. A ball screw for the Z-axis is the only way to go.

I

> am
> > > > >running a 180oz NEMA 23 with a 2:1 pulley ratio. Direct

drive

> on
> > > the
> > > > >X&Y axis'. Rapid rates are 24 IPM--Z and @13 IPM X&Y.(until

I

> > ball
> > > > >screw them as well)(would also improve with higher voltage
> > drives)
> > > > >Not finished fine tuning EMC yet so they might get even
> better!
> > I
> > > did
> > > > >a jig for work with it: 1st piece:50 holes .035 DIA, 5/16"
> THK
> > > 6061,
> > > > >w/ 2 .187 dowel holes 2nd piece: 50 holes .024 DIA, 1/8" THK
> O-
> > 1
> > > > >flat ground, w/ 2 .187 dowel holes. I used solid
> > carbide "circuit
> > > > >board" drills with the spindle running flat out, no broken
> > drills
> > > > >even with the "slow" spindle speed. Had to "peck" .015"
> deltas
> > > > >through the O-1. Both pieces line up perfect. I will be

going

> to
> > > > >market with the retro kit soon if you are interested? Just
> > waiting
> > > > >for another saddle to arrive so I can finish the ball screws
> for
> > > the
> > > > >X&Y.
> > > > >Good Luck with your upgrade it yields a nice little cnc for
> > small
> > > > >parts.
> > > > >Ken
> > > >
> > > > Yo Ken;
> > > >
> > > > Are you talking about a conversion kit for the mini-mill? If
> so,
> > > what are the
> > > > details?
> > > >
> > > > Bill
> > > >
> > >
> > >
> > > Yes let me know when it is available.
> > >
> > > I hope you have a site up soon too.
> > >
> > >
> > > Dave
> >
> > Details Details,
> > I plan to offer a full range from mechanics only kits right up to
> > fully assembled and tested closed loop machines.
> >
> > Basic "Mechanics" Only Kit:
> >
> > Modified headstock mount casting with pre-installed 5/8" DIA ball
> > screw & nut. (Non-preloaded nut as there is not enough room in

the

> > casting, however with the weight of the headstock on the ball nut
> > backlash is not really an issue except on heavy plunge cuts)
> >
> > Y & Z axis thrust bearing housings w/ 2 ball thrust bearings per
> axis
> > (utilize existing stock X axis thrust bearings)
> >
> > NEMA 23 motor mounts for all three axis' (NEMA 34 available on
> > request although I am a little concerned about the weight of a
> NEMA
> > 34 motor on the X axis)
> >
> > New mounting plate for spindle motor relocation.
> >
> > Z-Axis pulleys and belt.(haven't tried direct drive)
> >
> > All necessary installation hardware.
> >
> > Advanced Kit will include:
> > All of the above plus
> > Modified saddle casting with pre-installed ball screws & Nuts.
> >
> > For Basic electronics I've chosen a Xylotex based
> driver/controller
> > w/power supply, packaged in an enclosure with all necessary quick
> > disconnect cabling, and (3) 180 oz/in double stack NEMA 23's. I
> will
> > include the crossover cable to enable the use of EMC software if
> > desired. Hell I'll include the two CD's with the BDI installation
> and
> > all the settings I am using if you want.
> >
> > I am looking at the MAXNC closed loop package for advanced
> > electronics until I design my own set-up. (subject to change)
> >
> > Prices?
> > I am looking at @ $400.00 for the basic mechanics only kit.
> > Basic electronics is in the $500.00 ballpark.
> > Probably add @ $250.00 for the X&Y ballscrew upgrade.
> > MAXNC Closed Loop is @ $875.00 directly from them.
> >
> > Harbor Freight Machine $500.00 (chosen for R-8 spindle)
> > Basic Package $400.00
> > Basic Electronics $500.00
> > EMC Software $ FREE
> > -----------
> > Complete "MiniMill" CNC $1400.00 If you don't mind
> getting
> > your hands dirty. Even less if you supply the electronics.
> > CAST IRON DOVETAIL CONSTRUCTON WITH R-8 SPINDLE!!!!
> >
> > Full Basic Machine (stock x&y leadscrews) with basic electronics
> and
> > IBM PII 400mhz loaded with EMC all set-up and tested= @$2300.00
> >
> > I am a Toolmaker by trade, with an extensive industrial

automation

> > background, so this is not some chop and hack kit. It has been
> well
> > thought out and tested every step of the way. I am looking for
> > feedback so please respond.
>
>
> 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@a...,

timg@k...

> Moderator: pentam@c... indigo_red@q... [Moderators]
> 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/

>
>
>
>
> ---------------------------------
> Do you Yahoo!?
> SBC Yahoo! DSL - Now only $29.95 per month!
>
> [Non-text portions of this message have been removed]