RE: [CAD_CAM_EDM_DRO] Re: $250 machine pics

Hi John,

I saw what looked like bearings between the two bronze bushings but it
wasn't clear how it all works.

In my case, the flying head on the Z axis has pins that register in the
circuit board panel before the spring loaded programming pins make contact
with the board. I could be 0.020" off and not care in this case. Given
that I have to program between 1000 and 2000 boards at a time, this was
always intended to be a dedicated XYZ assembly that would also teach me a
few things. Got me into MACH2 for instance.

http://www.autoartisans.com/cnc/proghead3.jpg

This link points to a fairly large (115K) picture of the programming head.
The three posts are tapered and slide into the mounting holes. This
assembly will fit onto the Z axis.

John Dammeyer

>
> I'm glad you mentioned that.
>
> The motors have a washer in them that when direction changes
> will spring the shaft in or out just slightly.
>
> the leadscrew needs to be put between the support columns in
> such a way
> that it can't move from side to side at all. Not directly attached
> to the motor shaft. I used skate bearings to "lock" the screw between
> the columns...then carefully connect motor directly to the end of the
> leadscrew with a straight coupler.
>
> My circles were coming out not round and I watched what was happening
> for hours before I saw that.
>
> That's why my prototype machine in my pictures are "rigged up"
>
> If you need more info let me know and I'll get you some pictures.
>
> _John
>
>
>
>
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