Re: nice servos from plotter

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "skykotech" <rick@...> wrote:

>
> Hi guys,
>
> Haven't posted in awhile...been busy this summer with other
> projects. I just disassembled a HP7550A pen plotter and cut down
> the carriage to make a lightweight Y axis for a laser engraver. The
> plotter was all of $15 purchased locally, and includes two very nice
> pittman servos with encoders. They are pretty small, but actually
> have quite a bit of power. Of course there are little forces with a
> flying lens laser engraver, but perhaps they could be used to move a
> camera for a 3D digitizer or something similar. I am driving them
> with a Pixie P100 step/dir to analog converter (www.skyko.com)
> hooked to an Advanced Motion Controls 12A8 brush amplifier (a bit
> overkill).
>
> Here is a quick video of the carriage moving at 2640IPM running on
> Mach3. The carriage actually takes 4000 steps to move 1 inch, but I
> have set the step multiply in the Pixie P100 to 4x. With Mach3
> outputting a max of around 45khz, this gives me 1000dpi resolution
> and the 2640IPM travel speed (fairly fast, no?)
>
> http://www.skyko.com/videos/HP7550A.wmv
>
> -Rick
>

Hi Rick,
I'm thinking about laser engraving plastic labels and possibly
lasercutting steel at a later stage as i'm currently paying for both
these services.
Can you tell me what types of laser I would need and where I could buy
them at a reasonable price? I'm in Australia.
Thanks,
Glen.