Re: My CNC Mill retrofit project

Message: 9
Date: Fri, 8 Oct 1999 19:05:59 -0400
From: "Matt Shaver" <mshaver@...>
Subject: Re: Re: My CNC Mill retrofit project

> From: Ray Henry <rehenry@...>

> Matt figures that you need opto 22 stuff. It looks like there is some
> already there. They're shown in the top center of the bottom right photo.
>
> http://www.computersculpture.com/rammill_page.html
>
> It looks like the cards hold four devices each and there are three of them.
> Your mill gif shows them between the power supply panel and a row of
> control relays. That part of the drawing is laid out the same way the
> control box is laid out.
>
> If I'm reading these things right, the photo shows 8 opto devices in place.
> The layout shows 10 being used. The schematic shows 11 being used. You
> might want to keep the 110 volt wiring (red maybe) from these opto devices
> to the relays/contactors that they control in place for a while. Your new
> wiring from a parallel port or stg or (?) would go to the input screws on
> these boards.

Hey, you're right! I didn't look at the photo as close as I should have.
There should be enough of these to do the job. I think the relay (CR2)
labeled MAN. TOOL CHANGE is probably just for a tool change light or beacon.

[Does this turn the machine off in the middle of an operation, so one can
change tools and resume?]

My big question is what are the characteristics of the interface to the
Lovejoy spindle drive.

Matt

[I thought that was the most straightforward connection of the lot- isn't
it hooked directly to 3 phase 220 (after the fuses)? Then there seems to
be a 5amp(max ) 110 volt control circuit to change the speed and a spindle
error opto , as well as 2 optos for spindle CW and CCW. But now, looking
at it more closely, it seems like there was a modification made, because a
new spindle speed board is drawn in by hand on my schematic, coming from 92
on the terminal block. I'm not sure how this corresponds with reality,
though.]

Andrew Werby - United Artworks
Sculpture, Jewelry, and Other Art Stuff
http://unitedartworks.com