Re: [CAD_CAM_EDM_DRO] Acme Thread- opinions?

I built several machines using those enco mill/drill tables. The first
one used 2" pipe for the Z axis. It was basically three floor flanges , a
couple Tee and some various length nipples. It was assembled much like the
capital letter F but rotated 90 degrees to the right. The expose floor
flange was used as a base to mount a flat plate that held the Z axis
leadscrew, stepper and 1/4HP die grinder.
The other machine used a piece of 4X6 rectangular steel tubing. I welded
a base plate to it to secure it vertically to the stand. I used a harbor
freight 5" mill/drill vice for the Z axis . I replaced all the leadscrews,
added torrington needle thrust bearings and generally improved the imported
drive mechanism.
BTW I go to Tacoma screw all the time for fasteners.
Dan
-----Original Message-----
From: Steve Greenfield <polymorph@...>
To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
Date: Thursday, December 21, 2000 9:31 PM
Subject: [CAD_CAM_EDM_DRO] Acme Thread- opinions?

>OK, some rank beginner questions, to break up the "monotony" of all
>these E=MC2 topics. ;')
>
>I've ordered an XY mill/drill table from Enco and have some 150 oz-in
>steppers to bolt on it. I still need something for the Z axis, best bet
>seems to be for me to build it myself. The hardest materials I'm likely
>to work in this are plexiglass and wood.
>
>A local nut and bolt store (Tacoma Screw- really, it isn't a put-down)
>gave me a price on Acme threaded rod of $13 a foot for 1/2 inch 10tpi,
>and $6.50 for the "nut". Is that good, or bad? What kind of questions
>should I ask to make sure this is better than the average carjack Acme
>thread? For instance, should the nut be bronze or some other specific
>metal?
>
>I have been following the more advanced discussions with great interest,
>if little comprehension. The basics of CNC seem pretty transparent, it
>is the details that get hairy.
>
>Thanks,
>Steve Greenfield
>
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