Re: [CAD_CAM_EDM_DRO] Now have possession of my mill

Dennis Cartier wrote:

>Well I managed to move that Moog S-24 I purchased on eBay today. It was
>quite an undertaking. Just finding someone to move a 2 ton machine
>350Km's and not charge me more than I paid for the whole mill was the
>hard part.
>
>The good news is that I received a manual with the mill, and although it
>covers every Moog mill under the sun, it indicates the machine(s) use a
>5V 1000CPR rotary encoder mounted to the ballscrews. Excellent.
>
>Now I just have to decide how much of the, state of the art, Z-80 based
>controller with its whopping 16K of ram I want to replace. Ummm, all of
>it :)
>
>The machine currently has an 'Inland Motor, AC Spindle servo unit' that
>takes 0-10V signal along with a spindle enable and direction signal to
>control the RPM and rotation of the spindle. It would be nice to keep
>this and somehow interface it to EMC, I am just not sure if I can.
>
>I am bit confused on 1 point. The machine was operated on 480V 3P and I
>want to use 230 3P, and the specs for the spindle controller show either
> 230 or 480 input, then a power transformer with the controller
>delivering 220V to the spindle motor. What is the point of providing
>480V if the motor only needs 220V? But if it uses 220V ... I'm not
>complaining.
>
>The servos are quite large, and again if the specs in the manual can be
>believed, are 120V DC. Yow. Hmm, that would make for a cheap unregulated
>supply. No transformer required? :)
>
>Well maybe not, each axis amp delivers 16A :(
>
>The existing axis controllers and servo amps are again, Inland Motor
>units. I guess scrap these and use Jon's PWM units?
>
>

Well, you could, or you could keep the axis drives and use my PPMC board set
to drive the servo amps with the (presumably) +/- 10 V velocity command
signals.

>Last but not least, the tool changer is pneumatic. Have to figure out
>how to isolate and salvage this subsystem, or even if it can be.
>
>

If it is driven by air cylinders, just hook solenoid valves up to
control them.

Jon