Re: [CAD_CAM_EDM_DRO] EMC2 DC-servo controlled minimill

Just d-loading your video - nice stuff !
I appreciate teh specs on the mill / emc2 combo.

What size rails do you have ?
(Ie thk 25 mm - 15 mm dual block etc ?)

A- ootko suomesta/suomessa ?

Cheers-
hanermo

awallin55 wrote:

>
> Hi All,
>
> you may find some of my recent videos amusing/interesting.
>
> Servo tuning and test-running
> http://video.google.com/videoplay?docid=3321458111477478272&hl=en
> <http://video.google.com/videoplay?docid=3321458111477478272&hl=en>
>
> Testing the X-axis:
> http://video.google.com/videoplay?docid=1864749796574452730&hl=en
> <http://video.google.com/videoplay?docid=1864749796574452730&hl=en>
>
> Program dry-run:
> http://video.google.com/videoplay?docid=-4918805093165248240&hl=en
> <http://video.google.com/videoplay?docid=-4918805093165248240&hl=en>
>
> One of the first cuts:
> http://video.google.com/videoplay?docid=-6222166294337898920&hl=en
> <http://video.google.com/videoplay?docid=-6222166294337898920&hl=en>
>
> First 'serious' job, rough and finish cutting a model-yacht keel bulb
> out of steel:
> http://video.google.com/videoplay?docid=916833244018390029&hl=en
> <http://video.google.com/videoplay?docid=916833244018390029&hl=en>
>
> The machine started out life as an Opti BF-20 manual mill, but only
> the base and column remain. We've installed linear rails, ballscrews,
> a new belt-driven spindle, a new bigger table, and an enclosure to
> keep the coolant inside.
>
> It's controlled by EMC2 via an m5i20 pci-card from mesanet. The
> servo-amps are from Jon Elson / Pico-systems and the DC-servos from
> Dan Mauch / camtronics.
>
> The servos have 1000 count encoders so I get 4000 edges per revolution
> and they are direct-coupled to 2.5mm/rev ballscrews. I did the
> PID-tuning with rapids set to 4000mm/min and acceleration around
> 500mm/s and it stays inside +/- 16 counts or around 0.01 mm at all
> times. Better than this for actual cutting which we do at around
> 1500mm/min maximum.
>
> Next we are going to put an encoder on the spindle to enable rigid
> tapping.
>
> More about this in my blog: http://www.anderswallin.net/
> <http://www.anderswallin.net/>
>
> have fun,
>
> Anders
>
>
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