Re: [CAD_CAM_EDM_DRO] Tec/Apple/Abaton scanners for CNC use

Hi Alan,

That's a little tough, if you don't have the pinout of the IC. 18 pins,
drives motor with 3 or 4 pins. I'd identify the motor pins, and the
power pins, anything else (are we down to 2 pins?) remainder could be
the step/dir or cw/ccw signals. Tack on a few wires, and make it
"scan". Watch the lines. Try to relate the input lines to the
direction of the motor. Go for the Zen. Oops! Sounds a lot like
reverse engineering! Got a pin that's "stepping"? Disconnect it, and
try feeding in your own signal (might need to scan also, if there is an
"enable pin"), and see if responds. Got one pin that is high for fwd,
and low for reverse? You get it. cw/ccw will have two pins "taking
turns stepping" depending on direction.

HTH!

Alan KM6VV


beer@... wrote:

>
> While cleaning up around the university, I ran across two flat
> bed scanners destined for surplus.
>
> One is the old Apple One-Scan, the other is the Abaton/Everex Scan 300.
>
> Never allowing any piece of electronics to just pass me by and
> CERTAINLY not allowing anything with a motor in it to just be tossed, I
> snagged them.
>
> Upon taking them apart, I discovered that they are exactly the same
> mechanics with only slightly different scanning electronics.
>
> The optical assembly ( lens, mirrors and CCD ) move on a simple
> carriage; a linear bearing ( bronze bushing on a shaft ) on one side, a
> flat slide on the other, the weight of the optics keeping it anchored.
>
> A stepper, which I think is three phase, has a small FINE PITCH
> gear on it. This drives a much larger gear which drives a toothed belt
> which drives the table. ( Belt is firmly afixed to the slide. )
>
> Overall motion is about .001" per full step, using a quick eyball
> measurement.
>
> The motion control and power supply electronics live on a separate PCB
> from the SCSI/Optical/microcontroller electronics. ( One thing that DID
> catch my eye was a DAC on one of the uP boards, leading me to believe
> that these steppers may run in microstep mode. )
>
> Now, since I have TWO of these units, I immediately think X-Y, and given
> all the recent discussion of routing PCBs, I'm starting to think
> hmmm ...
>
> Here's the question.
>
> All the motion control electronics seem to live inside a single big
> 18 pin "IC-like" device, similar to some audio amplifiers devices.
>
> See
>
> http://www.nteinc.com/specs/1300to1399/pdf/nte1331.pdf
>
> for a similarly packaged device.
>
> The markings on it are
>
> TEC
>
> EC-A051
>
> Japan
>
> And that's about it.
>
> Now, I would really like to use these electronics, even if only as a
> starting point, if I can.
>
> But I can find no reference to these devices anywhere, in any of the
> usual spots. ( ECG, NTE, Google, etc. )
>
> And the service manual from Apple does not show schematics, only
> assemblies. Abaton manual is non-existent.
>
> Anyone seen these before ? Heard of them or the company ? Because
> reverse engineering this is not really an option .. a whole bunch of
> lines leading back to a big uP is not all that informative.
>
> Any help appreciated.
>
> Alan
>
> --
>
> Alan Rothenbush | The Spartans do not ask the number of the
> Academic Computing Services | enemy, only where they are.
> Simon Fraser University |
> Burnaby, B.C., Canada | Agix of Sparta
>
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