Homebrew PCBs

> DO you have any suggestions for a spray-on
> protection?

Krylon's crystal clear acrylic sprays work well. Very popular in art 
and photographic circles for this purpose. Careful, use several thin 
coats only, too much at one time and the toner will run. Never tried 
it with injet output but the same probably applies. Minwax's 
polyurethane sprays should also work, tried only the gloss, but it 
had a varnished look I didn't like.

> The 320 is the one I believe I am going with, while still low on 
> current (20 amps and I need 40), I am hoping it will work for me at 
> the reduced current.  The mechanical gearing I am using should 
> equalize the lower current as delivered by the Gecko.

Your maximum feedrate would basically determine your maximum current 
requirements. Other than reducing that, you could opt for higher 
voltage motors unless you've already speced for 80V motors.

Note that the Gecko 320 has a fixed encoder multiplier of 4X 
(standard quadrature feature of these encoders). This means that your 
software step frequency requirement will have to be four times higher 
than that required were there a 1X option. Depending on your 
software, encoder CPR and motor RPM, this can be an issue if the 
encoder is on the motor shaft.

--- In Homebrew_PCBs@yahoogroups.com, "lcdpublishing" 
<lcdpublishing@y...> wrote:
> > http://www.misterart.com/store/view.cfm?store=001&group_id=3700
> 
> Will check that out. DO you have any suggestions for a spray-on 
> protection?  I would think a laquer would eat the film.
> 
> > A simple plug-n-play setup using drivers from here;> The 320 is 
the one I believe I am going with, while still low on 
> current (20 amps and I need 40), I am hoping it will work for me at 
> the reduced current.  The mechanical gearing I am using should 
> equalize the lower current as delivered by the Gecko.

> > http://www.cadcamcadcam.com/index.asp?
PageAction=VIEWPROD&ProdID=11
> 
> 
> Rats, current is too low for my needs.
> 
> > http://www.geckodrive.com/item.htbml?order_id=0&item_id=G320
> 
> 
> Chris