Re: Rod Sizes

Was thinking about using the 2 smaller rods that have their
carriages with the base. 1 on each end with lead screw in the
middle. Then the Y-axis could use the largest, and the Z could use
one or 2 of the smaller rods.

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude"
<dave_mucha@...> wrote:

>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "krashking405"
> <krashking405@> wrote:
> >
> > OK, I have measured the rods I have. Three of them have the

carriages

> > that came out of the donor machines, two of these have a rod

diameter

> > of 0.35 inches [8.89mm] with a length of 15.28125 inches

[388.14375

> > mm], the other is .392 inches [9.9568mm] in diameter, and a

length of

> > 17 inches [431.8mm]. The rest have no carriages, I have two

at .235

> > inches [5.969mm] in diameter with a length of 10.5 inches [266.7

mm],

> > two at .275 inches [6.985mm], one has a length of 16.5 inches

[419.1

> > mm] the other is 9.71875 inches [246.85625mm], and one at .305

inches

> > [7.747 mm] in diameter with a length of 10.125 inches

[257.175mm].

> > What would my approximate work area be? I plan on using the rods

with

> > the carriages on the X, Y, and Z-axis. Can I get away with just

a rod

> > and lead screw per axis?
> >
>
> Put the heavest rods on the base. If you still have the slides,

then

> all you need to do is to adapt the slide to a platform maybe

epoxy or

> some such. maybe screws if you have them.
>
> if you figure securing each end by 1/2" and a 2 inch long bearing,
> then you have about 3 inches taken up.
>
> figure the dremel will drill down the center of the gantry and you
> lose an inch on each side from the slides. if it overhangs on one
> end, you lose the 2 inch on the slides, plus the overhang.
>
> If you get a length of 1/2" threaded rod, you could use that as one
> rail. but, the diameter of the parts is small an you might want a

3rd

> rail.
>
>
> As for end supports, you can use a 1x1 wood end rail and another on
> top of it. then just bolt them together and sandwich your rails in
> place. That allows a simple method of getting the ends mounted
> without high tech stuff.
>
> Although your rails are really light, you will be able to have the
> drill move accuratly to a location. that will allow you to

manually

> push the dremel into tougher materials for drilling. This is what

I

> do to spot drill holes in aluminum. I use a 1/8" dia center drill

and

> just finger press the unit into the aluminum, then take it to the
> drill press and put in the larger holes.
>
> The reason I mention this is because once you get the X and Y
> movement, you can use postioning to locate holes super accurate to
> make plates and supports to have the machine help you make parts

for

> the rest of the machine.
>
> Dave
>